Wavelength tunable, high energy femtosecond laser pulses directly generated from large-mode-area photonic crystal fiber

Wavelength tunable high energy ultrashort laser pulses are generated from a large-mode-area photonic crystal fiber in anomalous dispersion (AD) regime. A simplified laser cavity design with one fine polished facet of the fiber as a cavity mirror is used. The intra-cavity dispersion compensation is a...

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Bibliographic Details
Published in:Optics communications 2012-05, Vol.285 (10-11), p.2715-2718
Main Authors: Zhang, Chi, Zhang, Yu-ying, Hu, Ming-lie, Wang, Si-jia, Song, You-jian, Chai, Lu, Wang, Ching-yue
Format: Article
Language:English
Subjects:
Compensation
Crystal fibers
Dispersions
Fiber laser
Filtering
Filtration
Large mode area photonic crystal fiber
Lasers
Mode-locking
Photonic crystals
Wavelengths
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Summary:Wavelength tunable high energy ultrashort laser pulses are generated from a large-mode-area photonic crystal fiber in anomalous dispersion (AD) regime. A simplified laser cavity design with one fine polished facet of the fiber as a cavity mirror is used. The intra-cavity dispersion compensation is achieved by a grating pair, the spatial dispersed light from which also have optical spectrum filtering effects combined with the limited aperture of the fiber core. The laser system is able to generate ultrashort pulses ranging from 494fs (with 56nJ pulse energy) to 1.24ps (with 49nJ pulse energy) at 55MHz repetition rate. The filtering mechanism benefits the generation of high energy pulses with narrowing pulse duration in AD regime. An undulation in frequency and time domain is also observed with the increase of the pump power. Furthermore, this laser system is directly used as seed for supercontinuum generation.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2012.02.011