Half-mJ All-Fiber-Based Single-Frequency Nanosecond Pulsed Fiber Laser at 2- \mu

We report a high energy, high peak power, all-flber-based single-frequency ~15-ns pulsed laser source at ~1918.4 nm in master oscillator-power amplifier configuration. The pulsed fiber laser seed was achieved by directly modulating a continuous- wave single-frequency fiber laser using an electro-opt...

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Bibliographic Details
Published in:IEEE photonics technology letters 2012-03, Vol.24 (5), p.353-355
Main Authors: Qiang Fang, Wei Shi, Petersen, E., Khanh Kieu, Chavez-Pirson, A., Peyghambarian, N.
Format: Article
Language:English
Subjects:
2- mu{\rm m} nanosecond pulses
Erbium-doped fiber lasers
fiber amplifier
Laser applications
Optical fiber amplifiers
Optical fiber couplers
Optical fiber polarization
Power lasers
single-frequency lasers
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Summary:We report a high energy, high peak power, all-flber-based single-frequency ~15-ns pulsed laser source at ~1918.4 nm in master oscillator-power amplifier configuration. The pulsed fiber laser seed was achieved by directly modulating a continuous- wave single-frequency fiber laser using an electro-optic modulator driven by an arbitrary waveform generator to pre-shape the pulses before amplification to mitigate pulse steepening and dynamic gain saturation. One piece of large (25-μm) core, polarization-maintaining highly thulium-doped germanate glass fiber was used in the power amplifier stage to boost the energy and the peak power of the 15-ns pulses to >;0.5 mj and >;33 kW without any nonlinearities.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2011.2178824