763-nm second-harmonic-generation laser light source using direct-bonded quasi-phase-matched LiNbO3ridge waveguide

We fabricate a 763-nm laser module based on second-harmonic generation using a direct-bonded quasi-phase-matched LiNbO
3
ridge waveguide and a 1.55-µm band DFB laser diode. We also demonstrate O
2
gas detection using the 0.84-mW module output.