Laser beam pulses make optical fibers act as gun

A team of researchers from the U.S. has developed a new fiber laser technology that allows for stimulating the emission of electrons from the tip of an optical fiber by a laser beam pulse passing through the fiber. It should be noted that according to previous researches, it is possible to use these nanotips of optical fibers as electron sources if they are stimulated by laser beam light. Nevertheless, this light had to be originated from an external source before.

To be more precise, now a light pulse from a fiber laser passing along the optical fiber can lead to the appearance of electrons instead of previous techniques. Such fiber laser technology provides more efficient nanoscale imaging and sensing applications making it possible to add electrons from previously challenging angles or locations.

For example, previously the optical fiber tips had to be tracked by laser systems, and this was considered to be more challenging technologically. Therefore, this problem limits the ability to tale images quickly and from any position. The promising solution is electron emission techniques that lowered the necessary laser beam power thanks to the proper design of the nano-scale tip of the optical fiber.

“If the optical fiber terminates in a tapered gold-coated nanotip of the correct dimensions, then the field intensity for a pulse of fiber laser light going through the fiber would demonstrate a distinct hot-spot at the tip, sufficient to stimulate electron ejection.” The fiber laser technology has been already tested on a femtosecond laser system to emit ultrashort laser beam pulses through an optical fiber with 50-nanometer-radius nanotip coated with gold film.

The test results demonstrate the appearance of controlled electron emission as the result of stimulation from the gold-coated nanotip of optical fiber. Additionally,  the electric field increases by specific wavelengths of laser beam light. Herewith, a similar result can be achieved with a less powerful continuous-wave laser system, if the voltage at the tip is enhanced to compensate it. 

It should be noted that this is the smallest laser beam intensity capable to cause electron emission from nanotips. Thus, nowadays it is possible to use a low-cost laser system instead of expensive ones. If you are looking for a compact highly-efficient laser system, the Optromix company is ready to manufacture it. 

Optromix is a manufacturer of laser systems, optical fiber sensors, and optical monitoring systems. We develop and manufacture a broad variety of fiber lasers, high-powered fiber lasers, and other types. We offer simple laser products, as well as sophisticated fiber laser systems with unique characteristics, based on the client’s inquiry. 

We manufacture laser modules using our technologies based on the advanced research work and patents of the international R&D team. Laser processes are of high quality, high precision, easily-automated manufacturing solutions that provide repeatability and flexibility. If you have any questions or would like to buy a fiber laser system, please contact us at info@optromix.com

Ultrafast fiber laser system for biomedicine

A team of scientists from India has demonstrated its new ultrafast yellow fiber laser system that has a compact size and generates high-power laser beams. It is possible to adjust the laser system that in turn provides perfect laser beam quality, resulting in the creation of a practical yellow light source generating ultrafast laser beam pulses.

To be more precise, fiber lasers with the yellow spectral range are considered to be very useful for definite medical procedures. Nevertheless, their wavelengths are generally produced by applying large and inefficient copper vapor laser systems, dye lasers, and optical parametric oscillators. 

Even though their application is wide, they have great disadvantages, for instance, “low level of average power, the lack of an optimal spatial laser beam profile, limited or no wavelength tunability, and broad output pulses.” The conversion of mid-infrared laser beam light into yellow one requires a two-step nonlinear frequency change, therefore, it can be adjusted from 570 to 596 nm. 

Herewith, such a wavelength range emitted by the fiber laser is regarded as a very potential for a variety of applications. This fiber laser system shows a reliable, high-power, ultrafast, adjustable yellow emission in a rather simple experimental configuration.

Additionally, the applications of such fiber laser technology include not only biomedicine but also full-color video projection and other numerous spectral fields thanks to a sought-after laser beam wavelength range. Nonlinear frequency conversion allows for changing mid-infrared laser beam light into yellow one that can be adjusted from 570 to 596 nm.

It should be noted that fiber lasers play a crucial role in numerous applications because they produce numerous photons in a short period to offer high-intensity levels and accuracy without arousing thermal damage. Moreover, nowadays there is no commercially available yellow laser system that offers the required parameters, and that would stand to gain from that wavelength range.

The use of ultrafast fiber lasers enables scientists to overcome the current limitations in a single experimental configuration. The laser beam frequency of the ultrafast mid-infrared laser system with a peak wavelength has been doubled in two various nonlinear crystals, herewith, the scientists employed not complex fiber optic components available in any conventional laboratory to reach a high-power, adjustable, ultrafast yellow fiber laser source.

The fiber laser system has been already tested and offered tunable ultrafast laser beam emission with significant average power promising for different applications, involving spectroscopy, material processing, and imaging. The laser system’s operation demonstrates high stability over a long duration.

If you are looking for a compact highly-efficient laser system, the Optromix company is ready to manufacture it. Optromix is a manufacturer of laser systems, optical fiber sensors, and optical monitoring systems. If you have any questions or would like to buy a fiber laser system, please contact us at info@optromix.com

Fiber laser systems produce low-cost bioelectronics

Nowadays it is difficult to imagine the modern world without the use of laser systems. They have significantly changed the current technique of material processing, fiber lasers’ application includes welding, cutting, marking, measurement sensing, 3D scanning, LIDAR devices, scientific researches, the fiber laser systems are widely applied in domestic appliances and even as laser beam weapons. Moreover, the applications continue expanding.

Laser systems are also employed in bioelectronics, however, their production is considered to be difficult and expensive. Nonetheless, a team of researchers from the U.S. has presented an easy, low-cost, and scalable technique that allows for producing bioelectronics elements applying fiber lasers.

The fiber laser technology can also be used in medicine, for instance, in pacemakers. The production principle is based on polydimethylsiloxane (PDMS) that is regarded as a type of elastomer (highly elastic, stretchable material). The use of a pretty low-cost commercial laser beam cutter makes it possible to change the PDMS into dense silicon carbide material required for electronics and even in bioelectronics.

It should be noted that previously, the researchers had to synthesize all the elements separately and then combine them. Now the fiber laser technology “enables sections of the soft PDMS to be turned directly into silicon carbide through accurate laser beam engraving to produce a seamless integration.”

To be more precise, it is easier to attach soft material to soft and deformable cells. Herewith, the silicon carbide systems are ideal for electronics, and it does not degrade within the body. Taking into consideration the requirement in high accuracy, the production by the fiber laser system is a very promising method for this application.

The laser system has been already tested on a tiny pacemaker made by the team. The researchers put the composite on a rat heart, to which electrical signals were employed. Therefore, the heart rate synchronized immediately to that of the fiber laser system.

Additionally, the researchers claim that other potential applications of laser systems are distinguished: they contain scientific measurement sensing or the stimulation of arterial smooth muscle cells. Laser beam light allows for directing signals to nearby cells, resulting in a targeted response and potentially supporting control over the contraction and relaxation cycles of muscle cells. Finally, it is planned to employ fiber lasers in “remote-controlling” arteries during muscle surgeries and treating patients with spinal cord injuries.

If you are looking for a compact highly-efficient laser system, the Optromix company is ready to manufacture it. Optromix is a manufacturer of laser systems, optical fiber sensors, and optical monitoring systems. We develop and manufacture a broad variety of fiber lasers, high powered fiber lasers, and other types. We offer simple laser products, as well as sophisticated fiber laser systems with unique characteristics, based on the client’s inquiry. 

We manufacture laser modules using our technologies based on the advanced research work and patents of the international R&D team. Laser processes are of high quality, high precision, easily-automated manufacturing solutions that provide repeatability and flexibility. If you have any questions or would like to buy a fiber laser system, please contact us at info@optromix.com

Low-cost crystal used in a fiber laser at room temperature

Recently a group of researchers from China has presented a stable laser beam generation process provided by a fiber laser system with a low-cost crystal at room temperature, therefore, the technology allows for solving the problem limiting such long operation.

To be more precise, high beam quality laser is considered to be a common device applied in various fields of application from manufacturing and research to communications and entertainment. Modern laser systems offer highly uniform laser beam light emission.

It should be noted that fiber lasers are generally classified by materials that enable researchers to transform energy into laser beam light with common components containing inorganic and organic semiconductors, gases, and crystals. Herewith, recent developments in fiber laser technology give the new potential to low-cost crystals in the application of laser systems.

The developed high beam quality laser has a pretty low cost and perfect stability, herewith, it generates various colors that can be adjusted. Nowadays it has been succeeded to solve the problem of stopping laser beam generation during constant operation at room temperature by paying careful attention to energetic states called triplet excitons.

The development of fiber laser systems based on organic semiconductors faces several obstacles such as losses generated by the buildup of triplets, which haven’t been examined sufficiently. The thing is that laser beam energy includes usually positive and negative charges resulting in an exciton (a combination of opposite charges).

“Excitons are frequently observed in organic semiconductors and, because of quantum mechanics considerations, most often fall into two types termed singlets and triplets, with light emission being nearly impossible for triplets.” The researchers claim that triplets with long lifetimes are responsible for stopping of fiber laser system generation.

These triplets cause laser beam energy loss without producing light. Thus, the absence of these particles leads to solving the problem. The fiber laser technology has been already tested and demonstrated the opportunity to achieve a continuous laser beam process. 

If you are looking for a compact highly-efficient laser system, the Optromix company is ready to manufacture it. Optromix is a manufacturer of laser systems, optical fiber sensors, and optical monitoring systems. We develop and manufacture a broad variety of fiber lasers, high powered fiber lasers, and other types. We offer simple laser products, as well as sophisticated fiber laser systems with unique characteristics, based on the client’s inquiry. 

We manufacture laser modules using our technologies based on the advanced research work and patents of the international R&D team. Laser processes are of high quality, high precision, easily-automated manufacturing solutions that provide repeatability and flexibility. If you have any questions or would like to buy a fiber laser system, please contact us at info@optromix.com

High beam quality laser contradicts laws of refraction

A team of researchers from the U.S. has presented a type of laser beam that contradicts the standard laws of refraction, thus, leading to new opportunities for forming the beam flow of a laser system applied for optical and laser applications. To be more precise, laser beam light generally slows up when it goes through a material.

Nevertheless, new high beam quality laser emits light that does not change the speed at all resulting in the possibility of a laser beam to pass at various points in space at the same time. The operating principle of such a high beam quality laser is based on a spatial light modulator that changes the energy of the laser beam pulse to combine its properties in space and time.

The fiber laser technology developed enables the researchers to monitor the group speed of the laser beam pulse. “When a pulsed laser beam was given accurate spatiotemporal spectral correlations, it demonstrated refractory phenomena such as group-velocity invariance concerning the refractive index, group-delay cancellation, anomalous group-velocity increase in higher-index materials, and tunable group speed by changing the angle of incidence.”

It should be noted that the fiber laser technology has been already tested and the law of refraction was confirmed for spacetime wave packets that take into account these effects. Nonetheless, these properties of high beam quality laser contradict traditional laws of refraction. The researchers claim that one of the spacetime wave packets is always distinguished independently of materials through which laser beam light passes, herewith, it crosses two materials without changing its speed.

Thus, the medium properties are not important, that is why the laser beam will cross the interface and continue its operation. The thing is that the high beam quality laser does not influence the message speed, despite there are various types of materials. Pulses produced by the laser system can expand so that they arrive at various destinations at the same time.

This fiber laser technology is considered to be a new one offered a new concept for laser beam light. Therefore, such beams demonstrate the new behavior of laser systems and bring into question a build-in assumption. Finally, the team plans to examine the interaction of these new laser beams with tools such as laser systems and optical fibers, in addition to current data.

If you are looking for a compact highly-efficient laser system, the Optromix company is ready to manufacture it. Optromix is a manufacturer of laser systems, optical fiber sensors, and optical monitoring systems. We develop and manufacture a broad variety of fiber lasers, high powered fiber lasers, and other types. We offer simple laser products, as well as sophisticated fiber laser systems with unique characteristics, based on the client’s inquiry. 

We manufacture laser modules using our technologies based on the advanced research work and patents of the international R&D team. Laser processes are of high quality, high precision, easily-automated manufacturing solutions that provide repeatability and flexibility. If you have any questions or would like to buy a fiber laser system, please contact us at info@optromix.com

A new defensive fiber laser system

A company-manufacturer of laser systems for military applications from the U.S. presents a defensive system that can be mounted both in a pod and in a fairing. The thing is that the developed defensive fiber laser has been developed for the aircraft industry. A video has been shown and demonstrated two fiber laser systems: a pod installed under the centerline hardpoint, and a fixed device elevated in a fairing.

The operating principle of such defensive systems is based on fiber laser technology that applies an optical fiber as an active gain medium, compared to a solid-state laser system that employs glass or crystalline solid material. The main purpose of the fiber laser is the protection of air, sea and ground assets due to the opportunity to “reduce a threat at the speed of a lightning strike, the accuracy of a surgical scalpel, with the system that can deal with a swarm and with the scalable effect to be able to resist the threat.”

It should be noted that the fiber laser has the laser beam control system that allows delivering the laser onto the target, the pod installed on the tactical fighter jet to increase the laser beam power and cool the system. Moreover, such a fiber laser system can learn on adversary targets to suppress them. Even though the power of the system is not mentioned, specialists claim that it should be in the “tens of kilowatts” range.

Therefore, the laser system with such power enables army men to neutralize numerous air-launched missiles in flight. The developed fiber laser system for the military industry offers such benefits as self-protection against incoming threats, the ability to destroy several targets quickly, compensation for laser beam-spoiling transonic turbulence effects, compact size and reliable design, and the system is suitable for multiple aircraft types.

Herewith, the company also presented a 60 kW combined fiber laser that can emit a single laser beam of 58 kW. The laser system has not been yet tested because of technical challenges and complications caused by the coronavirus pandemic. Moreover, there are some concerns regarding the installation of such a huge laser beam system on an aircraft and its application to neutralize an adversary missile even from very close.

If you are looking for a compact highly-efficient laser system, the Optromix company is ready to manufacture it. Optromix is a manufacturer of laser systems, optical fiber sensors, and optical monitoring systems. We develop and manufacture a broad variety of fiber lasers, high powered fiber lasers, and other types. We offer simple laser products, as well as sophisticated fiber laser systems with unique characteristics, based on the client’s inquiry. 

We manufacture laser modules using our technologies based on the advanced research work and patents of the international R&D team. Laser processes are of high quality, high precision, easily-automated manufacturing solutions that provide repeatability and flexibility. If you have any questions or would like to buy a fiber laser system, please contact us at info@optromix.com

The Basics of Fiber Laser Systems

Fiber laser systems are considered to be a type of diode-pumped solid-state laser system that applies a doped core of standard optical fiber as the amplification medium. The thing is that fiber lasers consist of a fiber optic cable with a core doped with various rare earth elements.

It should be noted that these elements are chosen and then installed into the ultra-pure optical fiber core to obtain a required laser beam wavelength and power. Therefore, the pump diodes emit the laser beam light, which in turn raises the rare earth ions installed in the doped optical fiber core.

Additionally, the fiber laser system has fiber Bragg gratings which are located at each end of the optical fiber leading to the amplification of the laser beam light. It should be noted that “one of the gratings has a lower reflectivity than the other, which enables the laser beam light which has been produced in the cavity (amplifying medium) to exit the optical fiber.”

It turns out the laser beam spreads through the fiber of high power and out of the laser system. To be more precise, a doped optical fiber core operates as the amplification medium in fiber lasers, while diodes are regarded as pumps. Herewith, several semiconductor diodes are installed into the optical fiber to make the fiber operates as the amplifying medium.

Usually, there are multiple pump diodes in the fiber laser, and the laser beam light emitted by the pump diodes goes through a pump combiner to raise the active element in the core of the optical fiber. All fiber laser systems include the following components:

  • Doped optical fiber

This type of optical fiber looks like a cylindrical strand made of highly pure silica glass. They allow directing the laser beam by reflecting the light as it goes through the fiber.

  • Double-clad fiber

Fiber lasers generally apply double-clad fiber with a core of the rare-earth dopants. A traditional single-mode optical fiber provides the laser beam quality characteristics necessary to laser system manufacturers.

  • Ytterbium (Yb) optical fiber

This material is considered to be the most common rare-earth element, herewith, it provides pretty good laser beam light absorption.

  • Pump laser diodes

Laser system diodes are compact efficient tools that modify electrical energy to the laser beam light. The brightness and spectral qualities enable to pump the optical fiber.

  • Pump combiners

These passive devices additively enlarge the output power of the pump sources employed to raise the doped ions.

  • Fiber Bragg gratings

FBG is a type of distributed reflector that is written on a small part of optical fiber. It blocks specific wavelengths or operates as a wavelength-specific reflector.

Optromix is a fast-growing fiber laser manufacturer and a vendor of optical fiber sensors and optical monitoring systems. The company offers fast turnkey solutions and creates sophisticated fiber laser systems for special purposes. Optromix uses only its technologies and develops a broad variety of fiber lasers. If you have any questions or would like to buy a laser system, please contact us at info@optromix.com

Fiber laser systems open new properties of steel

Laser systems change the size of the melt pool in the 3D printing process, therefore, opening the magnetic qualities of the deposited steel. A team of researchers from Switzerland has presented new fiber laser technology that allows overcoming a supposed disadvantage of laser beam-based additive manufacturing of specific materials that produces new alloys with various qualities employed in 3D printed metallic workpieces of high accuracy.

To be more precise, the researchers develop a metallic chessboard 4 mm on a side, where the magnetic checkerboard squares follow nonmagnetic parts. To create such a laser system, it is necessary just to change laser beam power and duration to reverse the metal’s process microstructure leading to the ferromagnetic checkerboard.

Moreover, a type of stainless steel developed some 20 years ago has been used in the development of the new fiber laser system. It should be noted that the steel used includes no nickel and around 1% of nitrogen, herewith, this metal is considered to be non-allergic, therefore, it can be applied in the medicine. The thing is that steel is regarded as a material that is not suitable for 3D laser beam printing because the temperature fastly achieves the melting limit of the laser beam leading to the evaporation of the great part of the nitrogen peaks and the change of steel qualities.

Thus, the disadvantage of 3D printing performed by the fiber laser has been overcome by changing the scanning speed of the laser system and the intensity of the laser beam that allows melting the particles in the metal powder bed modifying he size and lifetime of the liquid melt pool in a specified way. The fiber laser system operates as the laser beam light source emitting at a 1070 nm wavelength at a maximum power of 200 W in a spot size of 55 μm. 

The researchers claim that during 3D printing the fiber laser enables to achieve temperatures of more than 2500°C locally that is why it is now possible to vaporize different components of an alloy in a targeted way (manganese, aluminum, zinc, carbon, and other) – it locally modifies the chemical composition of the alloy. Additionally, fiber laser technology can be promising for many other alloys, not only for stainless steel.

The application of 3D laser beam printing promotes the creation of structural components that react locally and in a staggered way to various temperatures. Finally, the ability of fiber lasers to create various alloy compositions with micrometer accuracy is regarded as highly promising in the design of more efficient electric motors.

Optromix is a fast-growing fiber laser manufacturer and a vendor of optical fiber sensors and optical monitoring systems. The company offers fast turnkey solutions and creates sophisticated fiber laser systems for special purposes. Optromix uses only its technologies and develops a broad variety of fiber lasers. If you have any questions or would like to buy a laser system, please contact us at info@optromix.com

Optimizing fiber laser processes

According to experts, understanding requirements of such processes as laser system welding, fiber laser cutting, and laser beam marking as well as the production facility promotes the development of a reliable system for the production that will increase the production rate and yield.

Nowadays numerous companies prefer to apply a define – design – deliver methodology that allows defining not only the equipment but also the best process through clear system design. Therefore, the understanding of fiber laser processes pays a crucial role in success as the laser beam source itself.

It should be noted that it is necessary to pay careful attention to not only basics but also other factors, for example, the climate of a factory can influence the range of potential optimal solutions. The thing is that some fiber laser systems may not operate as expected in a facility located near the equator that lacks air conditioning.

Herewith, although customer needs define the choice of materials, they may not always be suitable for laser system welding. Nonetheless, experienced engineers can help ensure a successful laser beam process. For instance, one customer wanted to move from resistance welding to fiber laser welding but brass includes too much zinc to be effectively laser welded resulting in replacement of brass with bronze or pure copper.

Additionally, the choice of fiber laser system equipment is also essential. “Unlike resistance welding, laser beam welding is a non-contact process and doesn’t utilize electrodes to hold parts in place, so customers must develop part fixturing to hold parts in place during welding.”

It is possible to revise the laser system process itself to unlock production potential. Some customers prefer to perform a butt weld to join two pieces with beveled or round edges, however, the efficiency of metal welding suffers in this case. Thus, specialists recommend not to perform welding rounded corners, and instead implement a laser beam process in which operators can round off corners after the weld has been completed.

When samples meet the required parameters, it is necessary to design a favorable solution. Herewith, there are two options for laser system welding: pulsed and fiber laser systems. Both laser technologies offer virtually the same performance but have different serviceability. To be more precise, the impulsed laser system is considered to be field serviceable, whereas a fiber laser must be sent back to the factory for repair and servicing. Nevertheless, the choice of specific system depends on process-specific requirements.

Optromix is a fast-growing fiber laser manufacturer and a vendor of optical fiber sensors and optical monitoring systems. The company offers fast turnkey solutions and creates sophisticated fiber laser systems for special purposes. Optromix uses only its technologies and develops a broad variety of fiber lasers. If you have any questions or would like to buy a laser system, please contact us at info@optromix.com

Laser systems made from 2D semi-materials

A team of researchers from the US has developed the physical process that allows producing laser systems from 2D materials. Thus, this fiber laser technology promotes the discovery of a fiber optic system for providing optical gain in 2D materials at much lower density levels than conventional semiconductors. This fiber laser system can offer an alternative to standard semiconductors and play a crucial role in game-changing for energy-efficient photonic tools.

It should be noted that previous experiments demonstrate that laser systems can be made from 2D materials as thin as a single layer of molecules. Herewith, other researchers had designed these fiber lasers at cryogenic temperatures, the other team used room temperature. The standard technique of laser physics supposes that it is unreal to create laser systems with a very low amount of laser beam power being pumped into a 2D semiconductor.

To be more precise, the researchers use a new gain fiber optic technology including charged excitons or trions in an electrically gated 2D material well below the Mott density. “After examining the signatures of optical gain and their relationship with excitons and trions, the researchers were able to clearly identify the origin of optical gain as being trionic in nature.”

The thing is that the thinness of the 2D materials, electrons, and holes tighten each other hundreds of times stronger than in standard semiconductor laser systems. Moreover, this strong charge connection in fiber lasers makes excitons and trions very stable, especially at room temperatures. The fiber laser technology enables the researchers to discover the balance of the electrons, holes, excitons, and trions and monitor their conversion to reach optical gain at very low levels of density.

The laser beam power required to reach Mott transition — the process by which excitons form trions and conduct electricity in semiconductor materials to the point that they reach the Mott density — is essential for the future processes. The absence pf new abilities provided by the laser system lead to the necessity to use a small power station to operate one supercomputer.

The combination of optical gain with low levels of laser beam power input leads to the development of future amplifiers and fiber lasers, which need a small amount of driving power. Although the researches result in new fiber laser technology that researchers can use to design low-power 2D laser systems, the team doubt if this is the same mechanism that led to the production of their 2017 nanolasers.

The improvements in such fiber optic systems continue. It is planned to examine how the fiber laser technology of optical gain works at various temperatures, and how to apply it to create nanolasers for a promising purpose. Finally, the team claims that their next step is considered to be a development of laser systems that can operate specifically employing the new mechanisms of optical gain.

Optromix is a fast-growing fiber laser manufacturer and a vendor of optical fiber sensors and optical monitoring systems. The company offers fast turnkey solutions and creates sophisticated fiber laser systems for special purposes. Optromix uses only its technologies and develops a broad variety of fiber lasers. If you have any questions or would like to buy a laser system, please contact us at info@optromix.com