Er-doped tapered fiber amplifier for high peak power sub-ns pulse amplification

Maxim M. Khudyakov; Andrey E. Levchenko; Vladimir V. Velmiskin; Konstantin K. Bobkov; Svetlana S. Aleshkina; Mikhail M. Bubnov; Mikhail V. Yashkov; Aleksey N. Gur'yanov; Leonid V. Kotov; Mikhail Likhachev

doi:10.1117/12.2624393

25 May 2022 Er-doped tapered fiber amplifier for high peak power sub-ns pulse amplification

Maxim M. Khudyakov, Andrey E. Levchenko, Vladimir V. Velmiskin, Konstantin K. Bobkov, Svetlana S. Aleshkina, Mikhail M. Bubnov, Mikhail V. Yashkov, Aleksey N. Gur'yanov, Leonid V. Kotov, Mikhail Likhachev

Author Affiliations +

Proceedings Volume 12142, Fiber Lasers and Glass Photonics: Materials through Applications III; 121420S (2022) https://doi.org/10.1117/12.2624393
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

A tapered Er-doped fiber amplifier for high peak power pulses amplification has been developed and tested. The core diameter changed from 15.8 µm (mode field diameter (MFD) 14.5 µm) to 93 µm (MFD 40 µm) along 3.7 meters maintaining single-mode performance at 1555 nm (according to the S2-method, the part of the power of high-order modes does not exceed 1.5 %). The amplification of 0.9 ns pulses with spectral width below 0.04 nm up to a peak power above 200 kW (limited by self-phase modulation) with a slope pump-to-signal conversion efficiency of 15.6% was demonstrated.

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Maxim M. Khudyakov, Andrey E. Levchenko, Vladimir V. Velmiskin, Konstantin K. Bobkov, Svetlana S. Aleshkina, Mikhail M. Bubnov, Mikhail V. Yashkov, Aleksey N. Gur'yanov, Leonid V. Kotov, and Mikhail Likhachev "Er-doped tapered fiber amplifier for high peak power sub-ns pulse amplification", Proc. SPIE 12142, Fiber Lasers and Glass Photonics: Materials through Applications III, 121420S (25 May 2022); https://doi.org/10.1117/12.2624393

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