Title :
Longitudinal-mode characteristics of weakly index-guided buried-stripe type 980-nm laser diodes with and without substrate-mode-induced phenomena
Author :
Horie, Hideyoshi ; Arai, Nobuhiro ; Yamamoto, Yoshitaka ; Nagao, Satoru
Author_Institution :
Opto-Electron. Res. & Technol. Dev. Center, Mitsubishi Chem. Corp., Ibaraki, Japan
Abstract :
We have carried out a systematic experimental study of the longitudinal-mode characteristics of 980-nm laser diodes with a weakly index-guided buried-stripe structure at high optical output powers. For comparison, we have prepared devices with 1.5- and 2.5-/spl mu/m cladding layers. We found large differences in the longitudinal-mode characteristics and light output linearity between the two types of devices. We think that these differences result from whether or not there is coupling between the ordinary laser-mode and an unusual substrate-mode. In addition, our results show an improvement in laser diode characteristics when the substrate-mode is suppressed.
Keywords :
infrared sources; integrated optics; laser modes; laser transitions; semiconductor lasers; substrates; waveguide lasers; 1.5 mum; 2.5 mum; 980 nm; cladding layers; high optical output powers; laser diode characteristics; light output linearity; longitudinal-mode characteristic; longitudinal-mode characteristics; ordinary laser-mode; substrate-mode; substrate-mode-induced phenomena; systematic experimental study; unusual substrate-mode; weakly index-guided buried-stripe structure; weakly index-guided buried-stripe type 980-nm laser diodes; Diode lasers; Laser modes; Optical coupling; Optical pumping; Optical refraction; Optical variables control; Optical waveguides; Power generation; Semiconductor lasers; Waveguide lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
