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物理学报. 2005, 54(9): 4411-4415.
doi: 10.7498/aps.54.4411.
飞秒激光在双折射微结构光纤中模式控制的四波混频效应的实验研究
- 收稿日期: 2004-07-15
- 修回日期: 2004-12-31
- 刊出日期: 2005-09-20
English Abstract
Mode-controlled four-wave-mixing in the birefringent microstructure fiber by femtosecond laser pulses
- Received Date:
15 July 2004
- Accepted Date:
31 December 2004
- Published Online:
20 September 2005
Abstract: Birefringent microstructure fibers are shown to allow efficient gereration of anti-Stokes line emission as a result of four-wave-mixing in higher mode by using unamplified femtosecond Ti:sapphire laser pulses.Intense blue-shifted lines with different central wavelength were generated in the high-delta (i.e.high-air filling in the cladding) microstructure fiber with axis sizes 50 and 46 μm by femtosecond laser pulses with 35-fs in duration,820nm in central wavelength and 4nJ in energy per pulse.The experimental result shows that phase-matched four-wa ve mixing in higher-order modes of microstructure fibers allows unprecedentedly high efficiencies of anti-Stokes frequency conversion to be achieved for subnano joule femtosecond laser pulses.The dependence factor of the four waves mixing in birefringent microstructure fiber is compared and analyzed.Good agreement betwe en the theory and experiment is achieved.
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Keywords:
- microstructure fiber /
- femtosecond laser /
- four-wave-mixing
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