Highly-Efficient SHG Laser by using Periodically Poled MgO:LiNbO&lt;inf&gt;3&lt;/inf&gt; and Its Application

Yamamoto, Kazuhisa; Furuya, Hiroyuki; Mizuuchi, Kiminori

doi:10.1109/leos.2007.4382596

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2009

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“…Compact, high-power, green lasers are of interest for a variety of scientific and technological applications such as material processing [1], human surgery [2], and laser display technology [3]. In continuous-wave (cw), single-frequency operation, they hold promise as pumps for singly-resonant optical parametric oscillators (SROs) [4] and Ti:sapphire lasers.…”

Section: Introductionmentioning

confidence: 99%

High-power, single-frequency, continuous-wave second-harmonic-generation of ytterbium fiber laser in PPKTP and MgO:sPPLT

2009

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Characteristics of high-power, narrow-linewidth, continuous-wave (cw) green radiation obtained by simple single-pass second-harmonic-generation (SHG) of a cw ytterbium fiber laser at 1064 nm in the nonlinear crystals of PPKTP and MgO:sPPLT are studied and compared. Temperature tuning and SHG power scaling up to nearly 10 W for input fundamental power levels up to 30 W are performed. Various contributions to thermal effects in both crystals, limiting the SHG conversion efficiency, are studied. Optimal focusing conditions and thermal management schemes are investigated to maximize SHG performance in MgO:sPPLT. Stable green output power and high spatial beam quality with M(2)<1.33 and M(2)<1.34 is achieved in MgO:sPPLT and PPKTP, respectively.

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Section: Introductionmentioning

confidence: 99%