MW peak power diffraction limited monolithic Yb-doped tapered fiber amplifier

Konstantin K. Bobkov; Maxim Yu. Koptev; Andrei E. Levchenko; Svetlana S. Aleshkina; Sergey L. Semenov; Alexander N. Denisov; Mikhail M. Bubnov; Denis S. Lipatov; Alexander Yu. Laptev; Alexey N. Guryanov; Elena A. Anashkina; Sergey V. Muravyev; Alexey V. Andrianov; Arkady V. Kim; Mikhail E. Likhachev

doi:10.1117/12.2253270

22 February 2017 MW peak power diffraction limited monolithic Yb-doped tapered fiber amplifier

Konstantin K. Bobkov, Maxim Yu. Koptev, Andrei E. Levchenko, Svetlana S. Aleshkina, Sergey L. Semenov, Alexander N. Denisov, Mikhail M. Bubnov, Denis S. Lipatov, Alexander Yu. Laptev, Alexey N. Guryanov, Elena A. Anashkina, Sergey V. Muravyev, Alexey V. Andrianov, Arkady V. Kim, Mikhail E. Likhachev

Author Affiliations +

Proceedings Volume 10083, Fiber Lasers XIV: Technology and Systems; 1008309 (2017) https://doi.org/10.1117/12.2253270
Event: SPIE LASE, 2017, San Francisco, California, United States

Abstract

Chirped pulse monolithic fiber amplifier based on a newly developed tapered polarization maintaining Yb-doped fiber has been developed and optimized. A novel amplification regime in a relatively long (220 cm) tapered fiber of improved design, which has been theoretically predicted, allowed us to achieve an ultimate high peak power. In this regime, the signal propagates most of the fiber without amplification and growths very rapidly only in the last 80 cm of the tapered fiber, which has a mode field area of approximately 1000 μm² near the output. We have demonstrated amplification of 20 ps chirped pulses centered at 1056-nm with spectral width of 20 nm to 0.7 MW peak power directly from the tapered fiber amplifier. The pulses had a diffraction limited quality (M² ~ 1.124) and could be compressed down to 350 fs with 50% efficiency. In addition, amplification of narrow-band 9 ps pulses centered at 1064 nm to a peak power of 1.8 MW directly from the tapered fiber amplifier was demonstrated.

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Konstantin K. Bobkov, Maxim Yu. Koptev, Andrei E. Levchenko, Svetlana S. Aleshkina, Sergey L. Semenov, Alexander N. Denisov, Mikhail M. Bubnov, Denis S. Lipatov, Alexander Yu. Laptev, Alexey N. Guryanov, Elena A. Anashkina, Sergey V. Muravyev, Alexey V. Andrianov, Arkady V. Kim, and Mikhail E. Likhachev "MW peak power diffraction limited monolithic Yb-doped tapered fiber amplifier", Proc. SPIE 10083, Fiber Lasers XIV: Technology and Systems, 1008309 (22 February 2017); https://doi.org/10.1117/12.2253270

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