0.98 mu m InGaAs-InGaAsP-InGaP GRIN-SCH SL-SQW lasers for coupling high optical power into single-mode fiber

• Published in: IEEE journal of quantum electronics 1993-06, Vol.29 (6), p.1932-1935
• Main Authors: Ohkubo, M., Namiki, S., Ijichi, T., Iketani, A., Kikuta, T.
• Format: Article
• Language: English
• Subjects: Applied sciences; Chemical lasers; Circuit properties; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Fiber lasers; Fundamental areas of phenomenology (including applications); Gallium arsenide; Integrated optics. Optical fibers and wave guides; Laser beam cutting; Laser excitation; Lasers; Optical and optoelectronic circuits; Optical coupling; Optical pumping; Optics; Other fiber-optical devices; Physics; Power lasers; Pump lasers; Semiconductor lasers; Semiconductor lasers; laser diodes
• ISSN: 0018-9197; 1558-1713
• DOI: 10.1109/3.234455

A CW optical power of 75 mW coupled into a single-mode fiber (SMF) at a driving current of 200 mA was achieved by InGaAs-InGaAsP-InGaP graded-index separate-confinement-heterostructure strained-layer single-quantum-well (GRIN-SCH Sl-SQW) ridge waveguide lasers emitting at 0.98 mu m. The GRIN-SCH profile was optimized to minimize the series resistance due to spikes at GaAs-InGaP heterointerfaces. Highly efficient coupling into a SMF with cutoff wavelength of 0.88 mu m by precisely controlling the ridge mesa width (around 2 mu m) and reducing the aspect ratio of the far-field pattern to 1.9. As a result, 0.98- mu m InGaP cladding lasers show performance comparable to the conventional AlGaAs cladding lasers.< >