12 April 1996 Compact SHG green lasers
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The combination of a laser material Nd:YVO4 and a nonlinear crystal KTiOPO4 (KTP) is a promising method for intracavity second harmonic generation (SHG) of laser diode pumped solid state lasers. A wavelength locking system, based on an optical feedback technique, is shown to contribute to locking the lasing wavelength of laser diode to the peak absorption wavelength of Nd:YVO4 and generating stable green light. By applying the wavelength locking system to multi-longitudinal mode laser diode, a continuous green light of 31 mW is efficiently generated for pumping power of 121 mW. The noise characteristics of generated green light are discussed in two cases of using a single or a multi-longitudinal mode laser diode as a pumping source. Moreover, SHG green laser of 3.1 cc is fabricated to gain output power of 2.8 mW using the wavelength locking with an optical bandpass filter as a wavelength selective optical component, which has advantages as more compactness and less accurate alignment.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yasuo Kitaoka, Yasuo Kitaoka, Kiminori Mizuuchi, Kiminori Mizuuchi, Kazuhisa Yamamoto, Kazuhisa Yamamoto, Makoto Kato, Makoto Kato, Wang Long Zhou, Wang Long Zhou, Takatomo Sasaki, Takatomo Sasaki, } "Compact SHG green lasers", Proc. SPIE 2682, Laser Diodes and Applications II, (12 April 1996); doi: 10.1117/12.237673; https://doi.org/10.1117/12.237673


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