Title :
A high gain GRIN-SCH MQW optical semiconductor laser amplifier
Author :
Magari, Katsuaki ; Kondo, Susumu ; Yasaka, Hiroshi ; Noguchi, Yoshio ; Kataoka, Tomoyoshi ; Mikami, Osamu
Author_Institution :
NTT Opto-Electron. Lab., Kanagawa, Japan
Abstract :
A description is presented of the fabrication of a multiple-quantum-well GRIN-SCH traveling-wave-type amplifier combined with a tapered waveguide and a window region to reduce optical reflection at both end facets. Optical fiber-to-fiber gain of 10.4 dB (signal gain of 24.4 dB) under gain variation of <1.0 dB is demonstrated in the 1.55- mu m-wavelength region. The maximum fiber-to-fiber gain was 10.4 dB. The FWHM of gain bandwidth was >100 nm and gain variation was <1.0 dB. The saturation output power was 13.5 dBm. As multiple quantum-well amplifiers with high signal gain and high saturation output power, the devices show considerable promise as post-amplifiers capable of being integrated with other functional semiconductor devices.<>
Keywords :
gradient index optics; optical communication equipment; optical couplers; optical workshop techniques; semiconductor junction lasers; 1.55 micron; 10.4 dB; diode laser fabrication; diode laser integration; end facets; fiber-to-fiber gain; gain bandwidth; gain variation; high gain GRIN-SCH MQW optical semiconductor laser amplifier; multiple-quantum-well; optical reflection; post-amplifiers; saturation output power; separate-confinement-heterostructure; signal gain; tapered waveguide; traveling-wave-type amplifier; window region; Fiber lasers; Gain; Optical saturation; Optical waveguides; Power amplifiers; Power generation; Quantum well devices; Semiconductor lasers; Semiconductor optical amplifiers; Stimulated emission;
Journal_Title :
Photonics Technology Letters, IEEE
