Pulse Energy Scaling by Optimizing Cavity Management in Low Repetition Rate Erbium-Doped Fiber Femtosecond Lasers

We experimentally demonstrate direct generation of 51 nJ, 284-fs ultrashort pulses in an all-fiber cavity-optimized erbium-doped laser with a low repetition rate of 2.68 MHz. The conversion efficiency of the laser is about 10%. The laser is mode-locked by nonlinear polarization rotation. Such high e...

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Bibliographic Details
Published inIEEE journal of quantum electronics Vol. 49; no. 4; pp. 408 - 412
Main Authors Peng, Junsong, Zhan, Li, Luo, Shouyu, Shen, Qishun
Format Journal Article
LanguageEnglish
Published IEEE 01.04.2013
Subjects
Cavity resonators
Dispersion
Fiber laser
Laser mode locking
mode-locking
Optimized production technology
Pump lasers
Ring lasers
Solitons
ultrafast
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Summary:We experimentally demonstrate direct generation of 51 nJ, 284-fs ultrashort pulses in an all-fiber cavity-optimized erbium-doped laser with a low repetition rate of 2.68 MHz. The conversion efficiency of the laser is about 10%. The laser is mode-locked by nonlinear polarization rotation. Such high energy and ultrashort duration benefits from using large output ratio (90%), elongating the cavity length, dispersion management, and bidirectional high-power pumping in the laser. Further decreasing the net dispersion of the laser by using a dispersion-compensated fiber can reduce the pulse duration to 160 fs. In addition, variation of spectral width due to an invisible filter in the laser is experimentally demonstrated.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.2013.2249495