Title

Photonic Crystal Fiber Pump Combiner For High-Peak Power All-Fiber Thulium Lasers

Keywords

All-fiber; Fiber amplifier; Photonic crystal fiber; Thulium

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. © 2014 SPIE.

Publication Date

1-1-2014

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

8961

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.2041327

Socpus ID

84900830714 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84900830714

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