This research laboratory develops and studies the properties of hollow fiber lightguides. Hollow-core lightguides have opened up new possibilities for solving a variety of scientific and applied problems. The hollow core of a lightguide removes many of the limitations imposed by the solid-core material of conventional lightguides. Moreover, the hollow revolver-type lightguides developed at the FORC RAS significantly reduce the proportion of radiation interacting with the cladding material. As a result, hollow fiber lightguides demonstrate unprecedented resistance to optical and ionizing radiation, allow distortion-free transmission of ultrashort pulses, and expand the spectral applicability of silica technology into the UV and mid-IR ranges. Filling the hollow core with gas mixtures of various compositions opens up new possibilities in the field of nonlinear optics. The development of this field has led to the creation of a new type of laser – gas fiber lasers, generating both nano-, pico-, and femtosecond pulses, as well as continuous radiation, in the near- and mid-IR range.
The main research areas conducted at the Hollow Fiber Optic Laboratory of the FORC RAS

• Study of radiation localization mechanisms in hollow-core optical fibers;
• Research on the creation of gas-discharge gas fiber lasers;
• Study of nonlinear optical effects in gas-filled revolver optic fibers;
• Research on the generation of supercontinuum and ultrashort pulses in the mid-IR range;
• Research on the transport of laser radiation with high peak and/or average power;

1. Гладышев А.В., Дубровский Д.С., Журавлева Е.Е., Косолапов А.Ф., Яценко Ю.П., Буфетов И.А. Рамановская генерация пикосекундных импульсов на длине волны 3,9 мкм в револьверном световоде. // Автометрия. – 2023. – Т. 59, № 1. – С. 15-23. DOI: 10.15372/AUT20230102
2. Losev L., Pazyuk V., Gladyshev A., Yatsenko Y., Kosolapov A., Bufetov I. Compression of few-microjoule femtosecond pulses in a hollow-core revolver fiber. // Fibers. – 2023. – V. 11, № 2. – Art. 22. DOI: 10.3390/fib11020022
3. Bufetova G., Kosolapov A., Yashkov M., Umnikov A., Velmiskin V., Tsvetkov V., Bufetov I. Extra-High Pressure in the Core of Silica-Based Optical Fiber Preforms during the Manufacturing Process. // Photonics. – 2023. – V. 10, № 3. – Art. 335. DOI: 10.3390/photonics10030335
4. Буфетов И. А., Гладышев А. В., Нефедов С. М., Косолапов А. Ф., Вельмискин В. В., Гончаров П. А., Минеев А. П. Поддержание СВЧ-разряда в полой сердцевине волоконных световодов для газовых волоконных лазеров. // Доклады Российской академии наук. Физика, технические науки. – 2023. – Т. 509, № 1. – С. 3-8. DOI: 10.31857/S2686740023020037
5. Gladyshev A., Nefedov S., Kolyadin A., Kosolapov A., Velmiskin V., Mineev A., Bufetov I. Microwave Discharge in Hollow Optical Fibers as a Pump for Gas Fiber Lasers // Photonics. – 2022. – Vol 9, No. 10. – P. 752. DOI: 10.3390/photonics9100752
6. Gladyshev, A., Yatsenko, Y., Kolyadin, A., Bufetov, I. Visible to Mid-Infrared Supercontinuum Initiated by Stimulated Raman Scattering of 1.03 μm Ultrashort Pulses in a Gas-Filled Silica Fiber // Photonics. – 2022. - Vol. 9, No. 12. – P. 997. DOI: 10.3390/photonics9120997
7. Крылов А.А., Гладышев А.В., Сенаторов А.К., Колядин А.Н., Косолапов А.Ф., Худяков М.М., Лихачев М.Е., Буфетов И.А. ВКР-преобразование 1.56 мкм → 2.84 мкм чирпированных импульсов мощного эрбиевого волоконного лазера в заполненном метаном полом револьверном световоде // Квантовая электроника. – 2022. – Т. 52, No. 3. – C. 274-277. DOI: 10.1070/QEL18003
   Перевод:
   Krylov A.A., Gladyshev A.V., Senatorov A.K., Kolyadin A.N., Kosolapov A.F., Khudyakov M.M., Likhachev M.E., Bufetov I.A. 1.56-to-2.84 μm SRS conversion of chirped pulses of a high-power erbium fibre laser in a methane-filled hollow-core revolver fibre // Quantum Electronics. – 2022. – Vol. 52, No. 3. – P. 274-277. DOI: 10.1070/QEL18003
8. Крылов А.А., Гладышев А.В., Сенаторов А.К., Яценко Ю.П., Колядин А.Н., Косолапов А.Ф., Худяков М.М., Лихачев М.Е., Буфетов И.А. Пикосекундный рамановский волоконный лазер с длиной волны 2.84 мкм // Квантовая электроника. – 2022. – Т. 52, No. 8. – С. 685-694.
9. Буфетов И. А., Колядин А. Н., Яценко Ю. П., Косолапов А. Ф. Спектральная диагностика оптического разряда, распространяющегося по полому волоконному световоду // Квантовая электроника. - 2021. - Т. 51 № 3. - С. 232–239. [Quantum Electron., 51:3 (2021), 232–239] DOI: 10.1070/QEL17481
10. Яценко Ю. П., Гладышев А. В., Буфетов И. А. Суперконтинуум среднего ИК диапазона, инициируемый двухкаскадным ВКР в револьверном световоде, заполненном дейтерием // Квантовая электроника. - 2021. - Т. 51 №12. - С.1068-1075. [Quantum Electronics. - 2021. - Vol. 51, No. 12. - P. 1068-1075.
11. Bufetov I., Babin S. // Raman Fibre Lasers. // Chapter 38 in:Handbook of Laser Technology and Applications Second Edition: Lasers Design and Laser Systems (Volume Two) edited by Chunlei Guo and Subhash Chandra Singh. CRC Press, Taylor & Francis Group - 2021. - P. 495- 513. ISBN 9781138032620 (hardback), ISBN 9781003127130 (ebook).
12. A. V. Gladyshev, I. A. Bufetov, “Hollow-core design provides polarization purity,” Nat. Photonics 14, 468–469 (2020). DOI:10.1038/s41566-020-0671-4
13. Gladyshev A., Yatsenko Y., Kolyadin A., Kompanets V., Bufetov I. Mid-infrared 10-µJ-level sub-picosecond pulse generation via stimulated Raman scattering in a gas-filled revolver fiber // Optical Materials Express. – 2020. – Vol. 10, No. 12. – P. 3081-3089. DOI: 10.1364/OME.411364
14. A. V. Gladyshev et al., “SRS generation of femtosecond pulses in a methane-filled revolver hollow-core optical fibre”, Quantum Electronics (2019), 49 (12):1089 DOI: 10.1070/QEL17155
15. A. V. Gladyshev et al., “Propagation of megawatt subpicosecond light pulses with the minimum possible shape and spectrum distortion in an air- or argon-filled hollow-core revolver fibre”, Quantum Electronics (2019), 49 (12):1100. DOI: 10.1070/QEL17156
16. M. S. Astapovich, A. V. Gladyshev, M. M. Khudyakov, A. F. Kosolapov, M. E. Likhachev and I. A. Bufetov, "Watt-Level Nanosecond 4.42-µm Raman Laser Based on Silica Fiber," IEEE Photonics Technology Letters, vol. 31, no. 1, pp. 78-81, 1 Jan.1, 2019. DOI: 10.1109/LPT.2018.2883919
17. I. A. Bufetov, A. F. Kosolapov, A. D. Pryamikov, A. V. Gladyshev, A. N. Kolyadin, A. A. Krylov, Y. P. Yatsenko and A. S. Biriukov, “Revolver Hollow Core Optical Fibers,” Fibers vol. 6, no. 2, Jun. 2018, Art. no. 39. DOI: 10.3390/fib6020039
18. A. V. Gladyshev, A. F. Kosolapov, M. M. Khudyakov, Y. P. Yatsenko, A. N. Kolyadin, A. A. Krylov, A. D. Pryamikov, A. S. Biriukov, M. E. Likhachev, I. A. Bufetov, E. M. Dianov, "2.9, 3.3, and 3.5 μm Raman Lasers Based on Revolver Hollow-Core Silica Fiber Filled by 1H2/D2 Gas Mixture," IEEE Journal of Selected Topics in Quantum Electronics, vol. 24, no. 3, pp. 1-8, May-June 2018, Art no. 0903008. DOI: 10.1109/JSTQE.2018.2810378
19. A. A. Krylov, A. K. Senatorov, A. D. Pryamikov, A. F. Kosolapov, A. N. Kolyadin, G. K. Alagashev, A. V. Gladyshev, I. A. Bufetov. "1.56 µm sub-microjoule femtosecond pulse delivery through low-loss microstructured revolver hollow-core fiber", Laser Physics Letters 14 (3), 035104, (2017)
20. Yu. P. Yatsenko, E. N. Pleteneva, A.G. Okhrimchuk, A.V. Gladyshev, A.F. Kosolapov, A.N. Kolyadin, I.A. Bufetov. "Multiband supercontinuum generation in an air-core revolver fibre" Quantum Electronics, 47 № 6 , 553–560 (2017)
21. A. V. Gladyshev, A. F. Kosolapov, A. N. Kolyadin, M. S. Astapovich, A. D. Pryamikov, M. E. Likhachev, I. A. Bufetov, "Mid-IR hollow-core silica fibre Raman lasers", Quantum electronics, 2017, 47 (12), 1078–1082
22. A. V. Gladyshev, A. F. Kosolapov, M. M. Khudyakov, Yu. P. Yatsenko, A. N. Kolyadin, A. A. Krylov, A. D. Pryamikov, A. S. Biriukov, M. E. Likhachev, I.A. Bufetov, E. M. Dianov. "4.4-μm Raman laser based on hollow-core silica fibre", Quantum Electronics 47 (5), 491- 494 (2017); Перевод: А.В. Гладышев, А.Ф. Косолапов, М.М. Худяков, Ю.П. Яценко, А.Н. Колядин, А.А. Крылов, А.Д. Прямиков, А.С. Бирюков, М.Е. Лихачев, И.А. Буфетов, Е.М. Дианов. "Волоконный ВКР-лазер на основе кварцевого световода с полой сердцевиной, генерирующий излучение на 4.4 мкм", Квантовая электроника, 47, №5, 491-494 (2017)
23. A. V. Gladyshev, A. N. Kolyadin, A. F. Kosolapov, Yu P. Yatsenko, A. D. Pryamikov, A. S. Biriukov, I. A. Bufetov, E. M. Dianov, "Low-threshold 1.9 um Raman generation in microstructured hydrogen-filled hollow-core revolver fibre with nested capillaries // LASER PHYSICS, 27(2), 025101 (2017)
24. A.V. Gladyshev, A.N. Kolyadin, A.F. Kosolapov, Yu.P. Yatsenko, A.D. Pryamikov, A.S. Biriukov, I.A. Bufetov, E.M. Dianov, “Efficient 1.9-μm Raman generation in a hydrogen- filled hollow-core fibre”, Quantum Electronics 45 (9) 807 – 812 (2015)

1. Gladyshev A., Nefedov S., Kolyadin A., Kosolapov A., Velmiskin V., Mineev A., Bufetov I. Microwave Discharge in Hollow Optical Fibers as a Pump for Gas Fiber Lasers // Photonics. – 2022. – Vol 9, No. 10. – P. 752. DOI: 10.3390/photonics9100752
2. Gladyshev, A., Yatsenko, Y., Kolyadin, A., Bufetov, I. Visible to Mid-Infrared Supercontinuum Initiated by Stimulated Raman Scattering of 1.03 μm Ultrashort Pulses in a Gas-Filled Silica Fiber // Photonics. – 2022. - Vol. 9, No. 12. – P. 997. DOI: 10.3390/photonics9120997
3. Gladyshev A., Yatsenko Y., Kolyadin A., Kompanets V., Bufetov I. Mid-infrared 10-µJ-level sub-picosecond pulse generation via stimulated Raman scattering in a gas-filled revolver fiber // Optical Materials Express. – 2020. – Vol. 10, No. 12. – P. 3081-3089. DOI: 10.1364/OME.411364
4. M. S. Astapovich, A. V. Gladyshev, M. M. Khudyakov, A. F. Kosolapov, M. E. Likhachev and I. A. Bufetov, "Watt-Level Nanosecond 4.42-µm Raman Laser Based on Silica Fiber," IEEE Photonics Technology Letters, vol. 31, no. 1, pp. 78-81, 1 Jan.1, 2019. DOI: 10.1109/LPT.2018.2883919
5. I. A. Bufetov, A. F. Kosolapov, A. D. Pryamikov, A. V. Gladyshev, A. N. Kolyadin, A. A. Krylov, Y. P. Yatsenko and A. S. Biriukov, “Revolver Hollow Core Optical Fibers,” Fibers, vol. 6, no. 2, Jun. 2018, Art. no. 39. DOI: 10.3390/fib6020039
6. A. V. Gladyshev, A. F. Kosolapov, M. M. Khudyakov, Y. P. Yatsenko, A. N. Kolyadin, A. A. Krylov, A. D. Pryamikov, A. S. Biriukov, M. E. Likhachev, I. A. Bufetov, E. M. Dianov, "2.9, 3.3, and 3.5 μm Raman Lasers Based on Revolver Hollow-Core Silica Fiber Filled by 1H2/D2 Gas Mixture," IEEE Journal of Selected Topics in Quantum Electronics, vol. 24, no. 3, pp. 1-8, May-June 2018, Art no. 0903008. DOI: 10.1109/JSTQE.2018.2810378
7. A. V. Gladyshev, A. F. Kosolapov, M. M. Khudyakov, Yu. P. Yatsenko, A. N. Kolyadin, A. A. Krylov, A. D. Pryamikov, A. S. Biriukov, M. E. Likhachev, I.A. Bufetov, E. M. Dianov. "4.4-μm Raman laser based on hollow-core silica fibre", Quantum Electronics 47 (5), 491- 494 (2017)
8. A.V. Gladyshev, A.N. Kolyadin, A.F. Kosolapov, Yu.P. Yatsenko, A.D. Pryamikov, A.S. Biriukov, I.A. Bufetov, E.M. Dianov, “Efficient 1.9-μm Raman generation in a hydrogen- filled hollow-core fibre”, Quantum Electronics 45 (9) 807 – 812 (2015)

• For the first time, femtosecond Raman gas fiber lasers have been implemented in the near- and mid-IR range. Specifically, in the mid-IR range, a pulse energy of 10 μJ was achieved with a pulse duration of 920 fs at a wavelength of 2.68 μm. Approximately 15 absorption lines of water vapor in atmospheric air were recorded.


• For the first time, nanosecond Raman gas fiber lasers in the mid-IR range have been developed and demonstrated. Using a quartz revolver fiber filled with hydrogen and/or deuterium, generation was achieved at wavelengths of 2.9 μm, 3.3 μm, 3.5 μm, and 4.4 μm. In particular, at a wavelength of 4.4 µm, an average power of over 1 W was achieved, and a quantum conversion efficiency of 53% was achieved.


• Revolving lightguides were proposed and implemented for the first time – a fundamentally new design of hollow-core (HCL) lightguides, in which the cladding of the hollow lightguide consists of a single layer of capillaries. A technology for manufacturing turret lightguides has been developed. Lightguides based on this design have become widespread worldwide due to their relative simplicity and manufacturability, which simultaneously ensures strong radiation localization within the hollow core. This fact enables the achievement of low optical losses even in spectral regions in which the cladding material is highly absorbing. For example, revolver light guides with a quartz glass cladding can be used in the spectral range from ~100 nm (vacuum UV) to ~5 µm (mid-IR).


• For the first time, a technology has been developed for drawing revolver light guides with nested capillaries in the cladding, a design for which was previously theoretically proposed by our international colleagues.