Longitudinal-mode characteristics of weakly index-guided buried-stripe type 980-nm laser diodes with and without substrate-mode-induced phenomena

• Published in: IEEE journal of quantum electronics Vol. 36; no. 12; pp. 1454 - 1461
• Main Authors: Horie, H., Arai, N., Yamamoto, Y., Nagao, S.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-12-2000; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Cladding; Devices; Diode lasers; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Joining; Laser diodes; Laser modes; Lasers; Linearity; Optical coupling; Optical pumping; Optical refraction; Optical variables control; Optical waveguides; Optics; Physics; Power generation; Quantum electronics; Semiconductor lasers; Semiconductor lasers; laser diodes; Waveguide lasers; Aluminium arsenides; Gallium arsenides; Semiconductor lasers; Output power; Infrared laser; Index guided laser; Laser modes; Experimental study; Laser diodes
• ISSN: 0018-9197; 1558-1713
• DOI: 10.1109/3.892566

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.