The laboratory's main focus is the development and research of new types of fiber optics for various applications. We also develop laser devices based on these fibers.

The laboratory conducts the following research:

• Design, manufacture, and research of erbium- and ytterbium-doped cladding-pumped fiber optics, including fibers with variable diameters and fibers with extremely high dopant concentrations. Lasers and amplifiers with high peak/average power based on these fibers are developed;
• Design, manufacture, and research of specialized fiber optics for generation at new wavelengths. The laboratory develops various light-guiding structures for the implementation of Yb lasers/amplifiers at 976 nm and Nd lasers/amplifiers at 920 nm. Research is underway on optically dense waveguide elements in a quartz cladding, optical fibers with complex diameter doping profiles, and optical fibers with extremely small quartz cladding. Optical fiber testing is performed in continuous and pulsed modes, including the implementation of drive signal sources;
• Design, manufacture, and research of radiation-hardened and radiation-sensitive optical fibers; research is conducted on the mechanisms of radiation-induced losses, their evolution over time and with temperature changes, and the development of methods for eliminating radiation-induced defects in optical fibers;
• Design, manufacture, and research of optical fibers with an increased SBS threshold. Research is underway on special designs of single-mode optical fibers with complex doping profiles, which reduce the overall gain peak by implementing multiple Brillouin resonances over a wide range of acoustic frequencies.

Collaboration:

The laboratory closely collaborates with a large number of research institutes and companies, including: the IInstitute of Chemistry of High-Purity Substances of the Russian Academy of Sciences (Nizhny Novgorod), theFORC-Photonics (Moscow), the Bauman Moscow State Technical University (Moscow), and others.

2026

1. S. S. Tsvetkov, T.S. Zaushitsyna, V.A. Agakhanova, L.D. Iskhakova, M.V. Yashkov, A.S. Lobanov, D.S. Lipatov, M.Yu. Salganskii, M.M. Bubnov, M.E. Likhachev, "Rigorous modeling of electrostrictively excited acoustic fields and SBS gain spectra in single-mode optical fibers," Journal of Lightwave Technology, doi: 10.1109/JLT.2026.3669028.
2. D. Davydov, S. Aleshkina, V. Velmiskin, A. Lobanov, M. Yashkov, D. Lipatov, D. Przhiialkovskii, O. Butov, M. Likhachev, "Monolithic Single-Mode Nd-Doped Fiber Laser Operated at 915-nm With 37% Slope Efficiency," IEEE Photonics Technology Letters, vol. 38, no. 8, pp. 543-546, 15 April15, 2026, doi: 10.1109/LPT.2026.3654345.

2025

1. Mikhailov, E. K., Levchenko, A. E., Velmiskin, V. V., Zaushitsyna, T. S., Bubnov, M. M., Lipatov, D. S., & Likhachev, M. E. Yb-doped tapered fiber amplifier with ultimately low higher-order modes content. Optical Fiber Technology, 95, 104455 (2025). https://doi.org/10.1016/j.yofte.2025.104455
2. Mikhail E. Likhachev, Egor K. Mikhailov, Tatiana S. Zaushitsyna, Vitaliya A. Agakhanova, Lyudmila D. Iskhakova, Mikhail M. Bubnov, Alexey S. Lobanov, Andrey A. Umnikov, Denis S. Lipatov, Highly Yb-doped silica-based fibers for ultra-short lasers and amplifiers, Optical Fiber Technology, Volume 95, 104427, 2025 https://doi.org/10.1016/j.yofte.2025.104427
3. Likhachev M.E., Zaushitsyna T.S., Agakhanova V.A., Aleshkina S.S., Bubnov M.M., Lobanov A.S., Oleinik D.I., Lipatov D.S. Refractive index of aluminophosphosilicate glass in optical fibers near AlPO4 join // Photonics. – 2025. – Vol. 12, N. 1. – P. 20. DOI: 10.3390/photonics12010020

2024

1. Aleshkina, S.S.; Davydov, D.A.; Velmiskin, V.V.; Yashkov, M.V.; Umnikov, A.A.; Alyshev, S.V.; Iskhakova, L.D.; Bubnov, M.M.; Lipatov, D.S.; Likhachev, M.E. Improvement of Efficiency in 976 nm Fiber Amplifier by Spectral Filtering in Yb-Doped Fiber with Absorbing Rods Embedded in the Cladding // Photonics – 2024. – Vol.11(1), 89. https://doi.org/10.3390/photonics11010089.
2. Kenzhina I.E., Kashaykin P.F., Vasiliev S.A., Zaurbekova Zh.A., Askerbekov S.K., Tolenova A.U., Samarkhanov K.K., Kulsartov T.V., Shaimerdenov A.A., Tomashuk A.L. Optical spectra in pure-silica-core single mode optical fibers after high-fluence reactor irradiation // Nuclear Materials and Energy. – 2024. – Vol. 339. – 01669. DOI: https://doi.org/10.1016/j.nme.2024.101669
3. E.K. Mikhailov, A.E.Levchenko, V.V.Velmiskin, T.S.Zaushitsyna, M.M.Bubnov, D.S., Lipatov, A.V. Shirmankin, V.A. Kamynin, M.E. Likhachev, Scaling of Average Power in All-Fiber Side-Pumped Sub-MW Peak Power ps-Pulses Yb-Doped Tapered Amplifier. Photonics 2024, 11, 915. https://doi.org/10.3390/photonics11100915

2023

1. Kenzhina I.E., Kashaykin P.F., Vasiliev S.A., Zaurbekova Zh.A., Askerbekov S. K., Tolenova A.U., Samarkhanov K.K., Akhanov A.M., Kulsartov T.V., Shaimerdenov A.A., Tomashuk A.L. Radiation-induced attenuation in single-mode pure-silica-core optical fibers two years after high-fluence reactor irradiation. // Optical Fiber Technology – 2023. – V. 80. – 103441. DOI: https://doi.org/10.1016/j.yofte.2023.103441
2. Kashaykin P.F., Vasiliev S.A., Tomashuk A.L., A.D. Ignatyev, Britskii V.A., Shaimerdenov A.A., Akhanov A.M., Silnyagind P.P., Kulsartov T.V. Radiation Resistance of Fiber Bragg Gratings under Intense Reactor Irradiation. // Bulletin of the Lebedev Physics Institute. – 2023. – V. 50 – Suppl. 3. – pp. S322-S328 (2023). DOI: 10.3103/S1068335623150071
3. Трошин О.Ю, Буланов А.Д., Салганский М.Ю., Тимофеев О.В., Комшина М.Е., Шумовская К.Ф., Томашук А.Л., Кашайкин П.Ф., Дроздов М.Н. Кварцевый световод на основе изотопно обогащенного 28SiO2", Неорганические материалы, том 59, №6, с. 618-623 (2023). DOI: 10.31857/S0002337X23060143
4. Kotov L. V., Temyanko V., Bubnov M. M., Lipatov D.S., Lobanov A. S., Abramov A., Aleshkina S.S., Guryanov A.N., Likhachev M.E., High-Energy Single-Frequency Core-Pumped Er-Doped Fiber Amplifiers. // Journal of Lightwave Technology – 2023 - vol. 41, no. 5 - pp. 1526-1532, DOI: 10.1109/JLT.2022.3206139.
5. Rybaltovsky, A.; Yashkov, M.; Abramov, A.; Umnikov, A.; Likhachev, M.; Lipatov, D. Optimization of the Core Compound for Ytterbium Ultra-Short Cavity Fiber Lasers. Fibers 2023, 11, 52. https://doi.org/10.3390/fib11060052
6. Davydov, D.A.; Rybaltovsky, A.A.; Aleshkina, S.S.; Velmiskin, V.V.; Likhachev, M.E.; Popov, S.M.; Ryakhovskiy, D.V.; Chamorovskiy, Y.K.; Umnikov, A.A.; Lipatov, D.S. An Ytterbium-Doped Narrow-Bandwidth Randomly Distributed Feedback Laser Emitting at a Wavelength of 976 nm. Photonics 2023, 10, 951. https://doi.org/10.3390/photonics10080951
7. Tsvetkov, S.; Lobanov, A.; Lipatov, D.; Khudyakov, M.; Zaushitsyna, T.; Iskhakova, L.; Kotov, L.; Likhachev, M. Al2O3/GeO2/P2O5/F-Doped Silica Large-Mode-Area Optical Fibers for High-Power Single-Frequency Radiation Delivery. Photonics 2023, 10, 1150. https://doi.org/10.3390/photonics10101150
8. Mikhailov, E.K.; Bobkov, K.K.; Levchenko, A.E.; Velmiskin, V.V.; Khudyakov, D.V.; Aleshkina, S.S.; Zaushitsyna, T.S.; Bubnov, M.M.; Lipatov, D.S.; Likhachev, M.E. Picosecond Pulse Tapered Fiber Amplifier Operated near 1030 nm with Peak Power up to 1 MW. Photonics 2023, 10, 1385. https://doi.org/10.3390/photonics10121385
9. Likhachev, M.E.; Zaushitsyna, T.S.; Agakhanova, V.A.; Iskhakova, L.D.; Aleshkina, S.S.; Bubnov, M.M.; Lobanov, A.S.; Lipatov, D.S. Refractivity of P2O5-Al2O3-SiO2 Glass in Optical Fibers. Photonics 2023, 10, 1383. https://doi.org/10.3390/photonics10121383
10. Aleshkina, S.S.; Davydov, D.A.; Velmiskin, V.V.; Yashkov, M.V.; Umnikov, A.A.; Alyshev, S.V.; Iskhakova, L.D.; Bubnov, M.M.; Lipatov, D.S.; Likhachev, M.E. Improvement of Efficiency in 976 nm Fiber Amplifier by Spectral Filtering in Yb-Doped Fiber with Absorbing Rods Embedded in the Cladding. Photonics 2024, 11, 89. https://doi.org/10.3390/photonics11010089

2022

1. S.Aleshkina, M.Yashkov, M.Salganskii, V.Velmiskin, A.Guryanov, M.Bubnov, M.Likhachev, "Spectrally Selective Optical Loss in Fibers With High-Index Rods Embedded Into Silica Cladding", Journal of Lightwave Technology, 40(14), 4848-4854, (2022). https://doi.org/10.1109/JLT.2022.3169029
2. S.S.Aleshkina, M.M. Khudyakov, T.A. Kashaykina, M.V. Yashkov, M.Yu. Salganskii, V.V. Velmiskin, M.M. Bubnov, and M.E. Likhachev, "High-Order Modes Suppression in All-Glass Large-Mode Area Rare-Earth Doped Optical Fibers with Modified Cladding", Photonics 2022, 9(9), 623; https://doi.org/10.3390/photonics9090623
3. M. M. Khudyakov, S.V. Tsvetkov, A.F. Kosolapov, M.M. Bubnov, A.S. Lobanov, D.S. Lipatov, A.N. Guryanov, M.E. Likhachev, "Combined Method for SBS Suppression in High Numerical Aperture Single-Mode Optical Fibers," IEEE Photonics Technology Letters, vol. 34(20), pp. 1069-1072, (2022), https://doi.org/10.1109/LPT.2022.3200152
4. K.K. Bobkov, E.K. Mikhailov, T.S. Zaushitsyna, A.A. Rybaltovsky, S.S. Aleshkina, M.A. Melkumov, M.M. Bubnov, D.S. Lipatov, M.V. Yashkov, A.N. Abramov, A.A. Umnikov, A.N. Guryanov, M.E. Likhachev, "Properties of Silica Based Optical Fibers Doped With an Ultra-High Ytterbium Concentration," Journal of Lightwave Technology, 2022, https://doi.org/10.1109/JLT.2022.3191862
5. K. K. Bobkov, D. S. Lipatov, M. Y. Salgansky, A. N. Guryanov, M. M. Bubnov and M. E. Likhachev, "All-Fiber Chirped-Pulse Amplifier Emitting 670 fs Pulses With 92 MW Peak Power," IEEE Photonics Technology Letters, vol. 34, no. 18, pp. 977-980 (2022), https://doi.org/10.1109/LPT.2022.3196276
6. K.Bobkov, A.Levchenko, D.Lipatov, A.Guryanov, M.Bubnov, and M.Likhachev, "Monolithic Side-Pumped Amplifier Based on an Yb-Doped Tapered-Fiber and Yielding 0.53 MW 9.3 ps Pulses", Photonics 9(10), 771 (2022). https://doi.org/10.3390/photonics9100771
7. Khudyakov, M.M.; Levchenko, A.E.; Velmiskin, V.V.; Bobkov, K.K.; Aleshkina, S.S.; Zaushitsyna, T.S.; Bubnov, M.M.; Yashkov, M.V.; Guryanov, A.N.; Kotov, L.V.; Likhachev, M.E. Narrow-Linewidth Diffraction-Limited Tapered Er-Doped Fiber Amplifier with 2 mJ Pulse Energy. Photonics 2022, 9, 933. https://doi.org/10.3390/photonics9120933
8. P.F.Kashaykin, E.A.Pospelova, A.L.Tomashuk, M.Yu.Salgansky, A.F.Kosolapov, N.N.Vechkanov, A.N.Guryanov, M.M.Bubnov, S.L.Semjonov, "Drawing- and radiation-induced color centers in pure-silica-core optical fibers in the near-IR range", Optical Fiber Technology, v.73, 103005 (2022), https://doi.org/10.1016/j.yofte.2022.103005
9. P.F. Kashaykin, E.A. Pospelova, Yu.O. Sharonova, O.L. Vokhmyanina, I.S. Azanova, A.L. Tomashuk, “Temperature and polarization dependence of radiation-induced attenuation in pure-silica-core PANDA optical fiber”, Optical Materials, vol. 131, 112510 (2022). https://doi.org/10.1016/j.optmat.2022.112510
10. P.F. Kashaykin, E.A. Pospelova, I.E. Kenzhina, Zh.A. Zaurbekova, S. K. Askerbekov M.Yu. Salgansky, A.A. Shaimerdenov, A.U. Tolenova, A.L. Tomashuk, “Gamma-radiation-induced attenuation of light in pure-silica core optical fiber in long-wavelength region”, International Journal of Mathematics and Physics, vol. 13, №1, pp. 73-78 (2022). https://doi.org/10.26577/ijmph.2022.v13.i1.08

2021

1. S.V. Tsvetkov , M.M. Khudyakov, A.S. Lobanov, D.S. Lipatov, M.M. Bubnov, A.N. Guryanov, V.Temyanko , and M.E. Likhachev, "SBS Gain Suppression in a Passive Single-Mode Optical Fiber by the Multi-Mode Acoustic Waveguide Design", Journal of Lightwave Technology, v.39(2), pp.592 - 599 (2021) https://doi.org/10.1109/JLT.2020.3031726
2. S.Aleshkina, T.Kashaykina, M.Yashkov, M.Salganskii, V.Velmiskin, M.Bubnov, and M.Likhachev, "Spectral filtering in single-mode fibers using resonant coupling with absorbing rods," Opt. Lett. 46, 1458-1461 (2021), https://doi.org/10.1364/OL.412429
3. K.Bobkov, A.Levchenko, T.Kashaykina, S.Aleshkina, M.Bubnov, D.Lipatov, A.Laptev, A.Guryanov, Y.Leventoux, G.Granger, V.Couderc, S.Février, and M.Likhachev, "Scaling of average power in sub-MW peak power Yb-doped tapered fiber picosecond pulse amplifiers," Opt. Express 29, 1722-1735 (2021) https://doi.org/10.1364/OE.413528
4. Khudyakov, M.M.; Levchenko, A.E.; Velmiskin, V.V.; Bobkov, K.K.; Aleshkina, S.S.; Bubnov, M.M.; Yashkov, M.V.; Gur’yanov, A.N.; Kotov, L.V.; Likhachev, M.E. Er-Doped Tapered Fiber Amplifier for High Peak Power Sub-ns Pulse Amplification. Photonics 2021, v.8, p.523. https://doi.org/10.3390/photonics8120523
5. H. Delahaye, C.-H. Hage, S. M. Bardet, I. Tiliouine, G. Granger, D. Gaponov, L. Lavoute, M. Jossent, S. Aleshkina, M. Bubnov, M. Salganskii, D. Lipatov, A. Guryanov, M. Likhachev, F. Louradour, and S. Février, "Generation of megawatt soliton at 1680 nm in very large mode area antiresonant fiber and application to three-photon microscopy", Journal of Optics, 23(11), 115504 (2021) https://doi.org/10.1088/2040-8986/ac26cf
6. S.Aleshkina and M.Likhachev, "All-glass hybrid fibers for dispersion management," J. Opt. Soc. Am. B, v.38(12), F115-F121 (2021) https://doi.org/10.1364/JOSAB.437891
7. Kashaykin P.F., Tomashuk A.L., Vasiliev S.A., Ignatyev A.D., Shaimerdenov A.A., Ponkratov Yu.V., Kulsartov T.V., Kenzhin Y.A., Gizatulin Sh. Kh., Zholdybayev T.K., Chikhray Y.V., Semjonov S.L. Radiation resistance of single-mode optical fibres with view to in-reactor applications // Nuclear Materials and Energy. – 2021. – Vol. 27 – статья № 100981. DOI: https://doi.org/10.1016/j.nme.2021.100981
8. Tomashuk A.L., Filippov A.V., Kashaykin P.F., Salgansky M.Yu., Vasiliev S.A., Zverev O.V, Guryanov A.N., Semjonov S.L. Behavior of strain-assisted self-trapped holes in pure-silica optical fibers upon pulsed-X-ray irradiation // Journal of Non-Crystalline Solids. – 2021. – Vol. 566, статья № 120880. DOI: https://doi.org/10.1016/j.jnoncrysol.2021.120880

• It has been shown that quartz glass (with appropriate co-doping of phosphorus and aluminum oxides) is suitable for the introduction of ultra-high concentrations of Yb2O3 (comparable to the levels achievable in phosphate glasses) . A highly ytterbium-doped polarization-maintaining fiber optic light guide has been developed. Based on this fiber, single-frequency fiber lasers emitting in a single polarization mode with a record-breaking cavity length of 14 mm have been implemented.


• To develop radiation-hardened fiber optics for use in sensors inside nuclear reactors, the radiation-induced optical loss spectra of fiber optics were studied after reactor irradiation in an intense gamma-neutron radiation field up to a fast neutron fluence of 1.8 x 10^20 n/cm^2 and a gamma dose of 2.32 GGy. Using these spectra, the physical mechanisms of radiation-induced losses were identified.


• For the first time, Nd fiber laser emitting at a wavelength of 915 nm was demonstrated, emitting with an efficiency of 37%, which, to our knowledge, is the highest recorded value among fiber lasers with a beam quality close to the diffraction limit (M^2 < 1.2). The laser is based on an Nd-based fiber optic cable with absorbing rods embedded in the cladding, which suppress parasitic amplified spontaneous emission (ASE) at a wavelength of approximately 1060 nm.


• A new method for suppressing stimulated Brillouin scattering (SBS) is proposed and experimentally validated by creating a multimode acoustic profile and varying the dopant concentration along the fiber radius. A simple and rapid method for modeling the SBS gain spectra for arbitrarily doped optical fibers is proposed.