Photonic crystal fiber pump combiner for high-peak power all-fiber thulium lasers

Alex Sincore; Jason Tafoya; Donald Sipes Jr.; Lasse Leick; Lawrence Shah; Martin Richardson

doi:10.1117/12.2041327

11 March 2014 Photonic crystal fiber pump combiner for high-peak power all-fiber thulium lasers

Alex Sincore, Jason Tafoya, Donald Sipes Jr., Lasse Leick, Lawrence Shah, Martin Richardson

Proceedings Volume 8961, Fiber Lasers XI: Technology, Systems, and Applications; 896133 (2014) https://doi.org/10.1117/12.2041327
Event: SPIE LASE, 2014, San Francisco, California, United States

Abstract

We report on the performance of a prototype pump combiner for use with thulium-doped photonic crystal fiber (PCF). This platform is attractive for “all-fiber” high energy and high peak power laser sources at 2 μm. We will report on the performance of this integrated amplifier in comparison to free space amplification in Tm:PCF. In particular, we carefully look for spectral/temporal modulation resulting from multimode interference between fundamental and higher order transverse modes in the amplifier to evaluate this for ultrashort chirped pulse amplification. The slope efficiency for the all-fiber amplifier is 22.1 %, indicating the need for further improvement. However, an M² < 1.07 demonstrates excellent beam quality, as well as amplified polarization extinction ratios of ~25 dB.

Citation Download Citation

Alex Sincore, Jason Tafoya, Donald Sipes Jr., Lasse Leick, Lawrence Shah, and Martin Richardson "Photonic crystal fiber pump combiner for high-peak power all-fiber thulium lasers", Proc. SPIE 8961, Fiber Lasers XI: Technology, Systems, and Applications, 896133 (11 March 2014); https://doi.org/10.1117/12.2041327

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