Title

Peak Power Scaling In Tm Doped Fiber Lasers To Mw-Level

Keywords

fiber laser; large mode area; laser amplifier; master oscillator power amplifier; photonic crystal fiber

Abstract

In this manuscript we present our recent achievements utilizing thulium-doped photonic crystal fiber rods (PCF-rods) for lasing at 2 μm wavelength and their potential as high peak power amplifiers. Two PCF-rods with 65 μm and 80 μm core diameter were first separately characterized in CW laser oscillators. The rods were pumped with a 793 nm laser diode and produced more than 18 W output power with near diffraction limited beam quality and a slope efficiency of up to 27.8 %. Implementing an intracavity high reflectivity grating for lasing wavelength selection enabled a tuning range of 180 nm from 1810 nm to 1990 nm. Thereafter the PCF-rod with 80 μm core was used as an amplifier and produced similar output powers when seeded with up to 4 W at 1960 nm from a master oscillator power amplifier (MOPA). The slope efficiency in this case was reduced to 20.1 % mainly due to the center wavelength of 1960nm. We are in the process of characterizing these rods in a pulsed amplification configuration to surpass MW-level peak power with multi-mJ pulse energy. © 2013 Copyright SPIE.

Publication Date

5-30-2013

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

8601

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.2004467

Socpus ID

84878172889 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84878172889

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