220 μj monolithic single-frequency Q-switched fiber laser at 2 μm by using highly tm-doped germanate fibers

Wei Shi, Eliot B. Petersen, Dan T. Nguyen, Zhidong Yao, Arturo Chavez-Pirson, Nasser N Peyghambarian, Jirong Yu

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

We report a unique all fiber-based single-frequency Q-switched laser in a monolithic master oscillator power amplifier configuration at ∼1920nm by using highly Tm-doped germanate fibers for the first time. The actively Q-switched fiber laser seed was achieved by using a piezo to press the fiber in the fiber Bragg grating cavity and modulate the fiber birefringence, enabling Q-switching with pulse width and repetition rate tunability. A single-mode polarization maintaining large core 25 μm highly Tm-doped germanate fiber was used in the power amplifier stage. For 80 ns pulses with 20 kHz repetition rate, we achieved 220 μJ pulse energy, which corresponds to a peak power of 2:75kW with transform-limited linewidth.

Original languageEnglish (US)
Pages (from-to)3575-3577
Number of pages3
JournalOptics Letters
Volume36
Issue number18
DOIs
StatePublished - Sep 15 2011

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Q switched lasers
fiber lasers
fibers
power amplifiers
repetition
pulses
Bragg gratings
birefringence
seeds
pulse duration
oscillators
cavities
polarization
configurations

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

220 μj monolithic single-frequency Q-switched fiber laser at 2 μm by using highly tm-doped germanate fibers. / Shi, Wei; Petersen, Eliot B.; Nguyen, Dan T.; Yao, Zhidong; Chavez-Pirson, Arturo; Peyghambarian, Nasser N; Yu, Jirong.

In: Optics Letters, Vol. 36, No. 18, 15.09.2011, p. 3575-3577.

Research output: Contribution to journalArticle

Shi, Wei ; Petersen, Eliot B. ; Nguyen, Dan T. ; Yao, Zhidong ; Chavez-Pirson, Arturo ; Peyghambarian, Nasser N ; Yu, Jirong. / 220 μj monolithic single-frequency Q-switched fiber laser at 2 μm by using highly tm-doped germanate fibers. In: Optics Letters. 2011 ; Vol. 36, No. 18. pp. 3575-3577.
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