700-Μj, 100-Ns, 20-Khz Pulses From A 1.5-M Thulium-Doped Fiber Amplifier

Keywords

2 μm, high energy fiber amplifier; nanosecond pulsed laser; Thulium fiber laser

Abstract

We report on a 2 μm master oscillator power amplifier (MOPA) fiber laser system capable of producing 700 μJ pulse energies from a single 1.5 m long amplifier. The oscillator is a single-mode, thulium-doped fiber that is Q-switched by an acousto-optic modulator. The oscillator seeds the amplifier with 1 W average power at 20 kHz repetition rate. The power amplifier is a polarization-maintaining, large mode area thulium-doped fiber cladding pumped by a 793 nm fiber-coupled diode. The fiber length is minimized to avoid nonlinearities during amplification while simultaneously enabling high energy extraction. The system delivers 700 μJ pulse energies with 114 ns pulse duration and 14 W average power at 1977 nm center wavelength.

Publication Date

1-1-2018

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

10637

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.2305160

Socpus ID

85050248176 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85050248176

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