Gain dynamics of two-wavelength Ti:sapphire femtosecond laser |
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| Authors: | W Shuicai Z Changjun H Junfang Y Hongru X Dong H Xun |
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| Institution: | (1) State Key Lab. of Transient Optics Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, P.O. Box 80, Xi’an 710068, P.R. China (Fax:+86-29/8484473), CN |
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| Abstract: | We report the theory and experiments of a two-wavelength bi-tuning femtosecond Ti:sapphire laser. The cross-mode-locked gain
competition is described with numerical solution and operation of the laser is accomplished in which two trains of femtosecond
pulses cross in the Ti:sapphire rod. For this reason, a cross-bearings technique is used. The laser resonator is a six-mirror
bi-cavity, and two beams of pump lights cross in Ti:sapphire crystal. Two trains of sub-30 fs cross-mode-locked pulses have
been generated with independent tunable wavelength when the pump power of the argon laser is approximately 5 W. As the design
of the bi-cavity is fine, not only strong gain competition is overcome, but also stable output characteristics are performed.
Received: 21 July 1998 / Revised version: 5 January 1999 / Published online: 30 July 1999 |
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| Keywords: | PACS: 42 50 42 55 R 42 60 F 42 65 |
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