论文信息 - Highly efficient cryogenically-cooled Yb:YAG laser

Highly efficient cryogenically-cooled Yb:YAG laser

A MOPA laser system for high pulse energy and high average power has been developed by using a cryogenic Yb:YAG. In the regenerative amplifier with our original TRAM architecture, the high pulse energies of 6.5 and 1.5 mJ were obtained at the repetition rate of 200 Hz and 1 kHz, respectively. An optical efficiency was as high as ηo-o = 9.3% with an excellent beam quality of M2 < 1.1, which ensured that a cryogenic Yb:YAG TRAM had a high thermal strength. The following four pass power amplifier with a cryogenic Yb:YAG rod showed 140 mJ at 100 Hz. Both a high optical efficiency of ηo-o = 30% and a high slope efficiency of ηs = 44% showed that an efficient laser operation could be realized for a power amplification with both a high pulse energy and a high average power by using a cryogenic Yb:YAG.

[1] T. Y. Fan,et al. Measurement of thermo-optic properties of Y3Al5O12, Lu3Al5O12, YAIO3, LiYF4, LiLuF4, BaY2F8, KGd(WO4)2, and KY(WO4)2 laser crystals in the 80–300K temperature range , 2005 .

[2] Junji Kawanaka,et al. Total-reflection active-mirror laser with cryogenic Yb:YAG ceramics. , 2009, Optics letters.

[3] Kyriaki Kosma,et al. Sub-10-fs supercontinuum radiation generated by filamentation of few-cycle 800 nm pulses in argon. , 2007, Optics letters.

[4] Shigeki Tokita,et al. Sapphire-conductive end-cooling of high power cryogenic Yb:YAG lasers , 2005 .

[5] Shigeki Tokita,et al. Dramatically improved laser characteristics of diode-pumped Yb-doped materials at low temperature , 2005 .

[6] Junji Kawanaka,et al. 213 W average power of 2.4 GW pulsed thermally controlled Nd:glass zigzag slab laser with a stimulated Brillouin scattering mirror. , 2008, Optics letters.

[7] A. Giesen,et al. Fifteen Years of Work on Thin-Disk Lasers: Results and Scaling Laws , 2007, IEEE Journal of Selected Topics in Quantum Electronics.

[8] Andy J. Bayramian,et al. High-average-power femto-petawatt laser pumped by the Mercury laser facility , 2008 .

[9] Ferenc Krausz,et al. Generation of sub-three-cycle, 16 TW light pulses by using noncollinear optical parametric chirped-pulse amplification. , 2009, Optics letters.