Frequency Doubling of Wavelength Locked Laser Diode with a Transmission-Type Filter in a Confocal Optical Configuration

Yasuo KITAOKA; Kiminori MIZUUCHI; Kazuhisa YAMAMOTO; Makoto KATO

doi:10.1007/BF03254870

Yasuo KITAOKA, Kiminori MIZUUCHI, Kazuhisa YAMAMOTO, Makoto KATO

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Keywords: LD (laser diode), wavelength locking, bandpass filter, confocal optics, SHG (second harmonic generation), QPM (quasi-phase-matched), LiTaO₃ (lithium tantalate)

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1994 Volume 1 Issue 2 Pages 227-229

DOI https://doi.org/10.1007/BF03254870

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Abstract

Direct frequency doubling of a wavelength locked laser diode with an optical bandpass filter in a confocal optical configuration is demonstrated. The wavelength of the laser diode was locked in single longitudinal mode oscillation and tuned to phase-matching wavelength of a quasi-phase-matched second harmonic generation device based on a LiTaO₃ waveguide. Stable blue light of 4.2 mW was obtained for incident power of 48 mW.

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