Tag: fiber laser manufacturer

Fiber laser systems criteria for clinical treatments

Which fiber laser systems suit treatment in clinics best? First of all, it should be noted that a laser system with higher power does not mean the opportunity to do things a much lower power fiber laser system will not. The application of Class 4 laser systems of 0.5 W of power is the ideal solution for laser technology treatment in clinics.

To be more precise, photobiomodulation therapy or low-level fiber laser therapy requires a sufficient quantity of laser beam light energy into injured tissues. The thing is that skin scatters and reflects most of the laser beam light that it is exposed to resulting in great challenges.

Herewith, specific wavelengths of laser beam light energy have the skin penetration ability higher than others. Nonetheless, additional barriers (hemoglobin, oxyhemoglobin, fat, and water) are distinguished under the skin that also catches or reflects more of the remaining laser beam light. Thus, it is necessary to pay careful attention to the choice of therapeutic wavelengths to maximize a fiber laser system’s efficiency.

Also, laser systems with the ideal laser beam wavelengths to penetrate the tissue and a low level of overall power allow efficient treatment of small areas and take 30 minutes or even longer. The possible solution to the low power of fiber lasers and the requirement to treat a large area is substantially increasing treatment time to maintain the necessary dosage.

Such a disadvantage of Class 3b laser systems is considered to be the main reason a lot of early fiber laser research demonstrated amazing results. Compared to Class 3, Class 4 fiber laser systems are used in photobiomodulation, where the previous lasers leave off at 0.5W of laser beam power.

The higher power of laser systems enables “sufficient laser beam energy to be passed onto nerve, muscle, ligament, tendon, and capsular tissue in a reasonable amount of time”. The thing is that the usual therapy session takes from 2 to 6 minutes, which is acceptable in a clinical setting.

Fiber laser systems of high beam quality offer such benefits as the versatility to treat injured tissue in multiple areas in a given session, which greatly improves the overall effectiveness of the laser when adding it to a plan of care. Nevertheless, Class 4 laser systems commonly have a higher cost than Class 3 laser technology.

Finally, it is necessary to take into consideration the following factors when choosing fiber laser products: the laser device manufacturing, warranty parameters, application heads, and a type of available customer service to learn the staff how to use the laser system effectively after it is purchased. Although the fiber laser cost plays a crucial role, careful consideration should be given to the mentioned factors.

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

Ytterbium Doped Fiber Lasers for spontaneous emission

A team of researchers presents a new random noise pulsed regime provided by a ytterbium doped fiber laser. Herewith, the output of the ytterbium laser complies with the photon statistics common to narrowband amplified spontaneous emission resulting in the noise pulsing in terms of probability density and autocorrelation functions. The new fiber laser technique demonstrates that the increase of ytterbium doped laser leads to a prominent decrease in the regime’s coherence time (from few ns to tens ps).

Fiber laser systems are regarded as highly promising tools that have a wide range of commercial applications. Fiber lasers are used as light sources in fully fiberized optical schemes with no free-space components. Herein, they offer a high level of optical and electrical to optical conversion efficiency. Additionally, fiber laser systems have various operating regimes, “characterized by narrow (from a tens Hz) to a very large optical band, in continuous-wave (CW) and pulsed regimes including Q-switched, mode-locking and soliton operations where the pulse width is ranged from hundreds of nanoseconds down to tens of femtoseconds”.

Ytterbium doped fiber lasers are considered to have such a benefit as an excellent power budget thanks to the absence of excited-state absorption. Nevertheless, ytterbium doped lasers have a disadvantage that influences their efficiency: there is a specific broadening of the laser line in the case when the cavity of fiber laser is made from FBG couplers. Thus, the partial leakage of fiber laser power occurs on highly reflective fiber Bragg gratings.
The output power of ytterbium doped fiber lasers may vary from several watts to tens kW or even a few hundred kW depending on single-mode and multimode operations. It should be noted that the low cavity Q-factor of ytterbium lasers causes high fiber laser gain, and the regime of the laser system is changed on random kW pulses resulting in Brillouin scattering.

The researchers confirm that the operation of ytterbium doped lasers happens in a noise pulse regime with random magnitudes and widths (not in the CW regime). Moreover, there is a dependence between the fiber laser photon statistics and laser beam power (and hence on laser linewidth), thus, its behavior seems similar to narrowband ASE. For instance, several high-amplitude noise events with low probability achieve powers more than the mean laser beam power.

Finally, the developed laser system has been already tested. It shows that the laser spectrum’s width becomes higher with increasing output power. While the rate of the ytterbium laser process at lower output powers is lower than at higher one. Taking into consideration the fact that the nonlinear optical fiber length is considerably shorter than the cavity one.

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