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28 May 1997 Ti:sapphire regenerative amplifier
Xun Hou, ShuangChen Ruan, Shuicai Wang, Jianjun Yang, Yanling Sun, Guoge Du, Shan Feng
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Proceedings Volume 2869, 22nd International Congress on High-Speed Photography and Photonics; (1997) https://doi.org/10.1117/12.273459
Event: 22nd International Congress on High-Speed Photography and Photonics, 1996, Santa Fe, NM, United States
Abstract
The design and performance of a stable Ti:sapphire regenerative amplifier. 7 mJ (800 nm) per pulse at the repetition rate 10 Hz, has been described. The resonator consists of one concave mirror (R equals 4000 mm) and one plane mirror, spaced at a distance of 1.76 m. The two mirrors are coated for high reflection centered at 800 nm. Two Pockel cells, one broadband waveplate and polarizer are used to switch a pulse into and out of the resonator. The Ti:sapphire crystal rod is 6X6X14 mm with an absorption coefficient of 2.6 cm-1 at 490 nm and both sides is cut at Brewster's angle. The pump source is frequency double Nd:YAG laser. For regenerative amplifier, the pump energy which we usually use is 64 mJ per pulse. The seed pulse is from a self-mode-locked Ti:sapphire laser that provides 400 mW of outpower with pulse duration about 80 - 100 fs. After stretching the pulse to about 200 - 300 ps by using the grating stretcher, we inject the pulse into the regenerative amplifier and obtain 7 mJ output energy in single pulse, a net gain of up to 106. This laser system is a pre-amplifier for high energy amplifier.
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Xun Hou, ShuangChen Ruan, Shuicai Wang, Jianjun Yang, Yanling Sun, Guoge Du, and Shan Feng "Ti:sapphire regenerative amplifier", Proc. SPIE 2869, 22nd International Congress on High-Speed Photography and Photonics, (28 May 1997); https://doi.org/10.1117/12.273459
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KEYWORDS
Amplifiers
Mirrors
Pulsed laser operation
Laser systems engineering
Nd:YAG lasers
Photography
Crystals
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