Optromix Laboratory

Optromix, established in 2004, has an extensive experience in the development of unique laser systems based on the advanced research work and patents of international R&D team.

Optromix Company cooperates with the world recognized scientists from the Institute of Automation and Electrometry, particularly with Dr. Sergey A. Babin and patentee for the many inventions in the field of lasers and optical sensors technologies Dr. Dmitry S. Starodubov. In 2015 we started operations in the US.

Today we offer a wide range of top quality laser and optical products from coast to coast through our offices in Cambridge, MA and Los Angeles, CA.

Today Optromix R&D team together with the Institute of Automation and Electrometry (IA&E, SB RAS) conducts research and develop the following advanced laser systems:

Pulsed Thulium Fiber Laser System. 1870 -1980 nm pulsed fiber laser with a high peak power output about 800 kW (80 mJ at pulse) at repetition rate ~200 Hz

There is a huge demand for 2 μm Thulium fiber lasers with a high peak power and beam quality in the market. This laser has a lot of different applications in science, medicine and material processing due to its unique characteristics. It corresponds well to an atmospheric transmission window wavelength; hence, it can perform atmosphere measurements, which means it can be perfectly used for eye-safety radar, LiDAR and gas remote analysis.

Our team is currently developing an efficient solution to produce this laser system. It is well known that the doping concentration of rare-earth ions in a silica fiber is limited due to the intrinsic glass network structure. Various approaches have been developed to increase the doping concentration including co-doping with oxides Al2O3, B2O3, and P2O5 and using nano-particle technology. The highest doping level in silica glass is limited to approximately 2 wt%. Due to the limited Tm3+ doping concentration the quantum efficiency of Tm3+ doped silica fiber lasers is also limited.

All-fiber highly chirped dissipative solution oscillator for ultrafast femtosecond ytterbium mode-locked fiber laser

A special fiber resonator design makes the pulse generation and energy far more stable. It is based on the nonlinear polarization rotation effect; a mode-locked laser generates pulses with high-frequency modulation (chirp) constricted by the external compressor up to 250 fs length.

The pulse energy is 6 nJ, and it can be increased to 20 nJ and more by using large mode area fibers (LMA fibers). The main problem is stimulated Raman scattering which plays a significant role when each level is more than 10 nJ. On the other hand, this effect may be used to generate a pair of coherent and synchronous pulses separated from each other by Raman shift. This source may find its potential application in CARS-diagnosis when generating different frequencies.

Optromix engineers continue to improve previously developed products.

257,5 nm UV CW fiber laser for FBG writing

It is designed to replace the gas (Argon) laser for the fiber Bragg grating writing. Optromix UV CW 257,5 nm fiber laser is a lot more stable, reliable and compact compared to argon one. On top of that, UV CW 257,5 FBG workstation is much easier to operate than a gas laser recorder. Ytterbium 1030 nm fiber laser’s fourth harmonic gives a compact source in the ultraviolet spectrum range, which is a great replacement of an inefficient argon laser.

However, it is more difficult to replicate the same results in the wavelength range of less than 1020 nm. The issue is that the absorption and the emission of cross sections near 975 nm coincide for Yb-doped fiber lasers. Therefore, more than 50% of ions must be excited to prevent their re-absorption.

Continuous wavelength tunable CW Green fiber laser

Tunable green fiber laser was initially developed for a well-known medical research facility (National Institute of Health, Bethesda, MD) to install the flow cytometer. Right now, our team is working to expand the wavelength adjustment range.

Apodized FBG

When the refractive index modulation depth is constant within a certain length and then suddenly drops to zero outside this range, the side “petals” emerge in a reflection spectrum, especially when the reflection peak is large (see fig. 1a). These side lobes can sometimes cause significant interferences, for example, when FBG is used as an optical filter.

They are reduced by using apodization technique (fig. 1b): the refractive index modulation depth changes smoothly along the grating length. Of course, it is necessary to increase the overall grating length to achieve a certain reflection peak. For the specific profile of the refractive index modulation in an apodized fiber Bragg grating there is a tradeoff between the optimal side lobe suppression and maximum reflectance for gratings with a limited length and predetermined maximum value of the refractive index modulation depth.

This technique allows increasing the optical quality of some fiber elements, such as band-pass filters, mirrors etc.

fig 1a

fig 1b

  • 1. Frequency doubling of a tunable ytterbium-doped fibre laser in KTP crystals phase-matched in the XY and YZ planes.
    Vladimir A. Akulov 3, Sergei I. Kablukov, Sergey A. Babin 1
  • 2. Tunable Green Yb-Doped Fiber Laser
    Vladimir A. Akulov 3, Denis M. Afanasiev, Sergey A. Babin 1, Dmitriy V. Churkin, Sergei I.Kablukov, Michail A. Rybakov, Alexander A. Vlasov
    DOI: 10.1364/ASSP.2007.MB22
  • 3. Yb-doped fiber laser with tunable FBG
    Vladimir A. Akulov 3, Denis M. Afanasiev, Sergey A. Babin 1, Sergei I.Kablukov, Michail A. Rybakov, Alexander A. Vlasov.
  • 4. Optically Assisted Internet Routing Using Arrays of Novel Dynamically Reconfigurable FBG-Based Correlators
    Michelle C. Hauer, John E. McGeehan, Saurabh Kumar, Joseph D. Touch, Joseph Bannister, Edward R. Lyons, C. H. Lin, A. A. Au, H. P. Lee, Dmitry S. Starodubov 2, and Alan Eli Willner
    Publication Date: 2003 Publication Name: IEEE/OSA Journal of Lightwave Technology
  • 5. Generation and scaling of highly-chirped dissipative solitons in an Yb-doped fiber laser
    D.S. Kharenko, 1,2,∗ O.V. Shtyrina, 3,1 I.A. Yarutkina, 3 E.V. Podivilov, 1,2 M.P. Fedoruk, 3,1 and S.A. Babin 2,1
    DOI 10.7452/lapl.201210060
  • 6. Feedback-controlled Raman dissipative solitons in a fiber laser
    Denis S. Kharenko,1,2, ∗ Anastasia E. Bednyakova,2,3 Evgeniy V. Podivilov,1,2 Mikhail P. Fedoruk,2,3 Alexander Apolonski,1,4 and Sergey A. Babin1,2 26
  • 7. Multicolour nonlinearly bound chirped dissipative solitons
    Sergey A. Babin1,2, Evgeniy V. Podivilov1,2, Denis S. Kharenko1,2, Anastasia E. Bednyakova2,3, Mikhail P. Fedoruk2,3, Vladimir L. Kalashnikov4 & Alexander Apolonski1,5
    DOI: 10.1038/ncomms5653
  • 8. 20 nJ 200 fs all-fiber highly chirped dissipative soliton oscillator
    D. S. Kharenko,1,2,* E. V. Podivilov,1,2 A. A. Apolonski,1,3 and S. A. Babin1,2
    DOI: 10.1364/OL.37.004104
  • 9. Tuning and Doubling of the Generation Frequency of Fiber Lasers
    V. A. Akulov and S. I. Kablukov
    DOI: 10.3103/S875669901304002X

Patent: Fibre Laser with Intracavity Frequency Doubling US 20090245294 A1
Patent: Optical fiber sensors, tunable filters and modulators using long-period gratings US 6058226 A
Patent: Near-ultraviolet formation of refractive-index grating using reflective phase mask US 5745617 A