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6 June 2001 High-efficiency and high-power laser diodes for CD-R/RW and DVD-RAM/RW
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Proceedings Volume 4287, In-Plane Semiconductor Lasers V; (2001)
Event: Symposium on Integrated Optics, 2001, San Jose, CA, United States
As light sources of CD-R/RW and DVD-RAM/RW, highly efficient high-power 785 nm (AlGaAs) and 660 nm (AlGaInP) lasers are demonstrated, respectively. A real-refractive-index waveguide with small internal loss is applied to both the lasers in order to reduce the operating current by improvement of the external differential quantum efficiency. The mirror degradation level is increased by reduction of the optical power density and/or a non-optical-absorbing effect of the window-mirror. As a result, the 785 nm window- mirror with AlGaAs current blocking layer has showed stable transverse mode operation up to 250 mW (kink level: over 300 mW at CW) with the high slope efficiency of 1.1 W/A. Reliable 140 mW-CW and 180 mW-pulse operation has been realized at 70 - 75 degree(s)C. As for a 660 nm laser with the window-mirror, the operation current at 70 mW is reduced by 40% due to the high slope efficiency (1.08 W/A) resulting from the low-loss ridge-waveguide. The lateral mode is well stabilized up to 70 mW by the effect of the narrow ridge stripe formed by a dry etching technique. Reliable 70 degree(s)C, 70 mW pulse (duty cycle: 50%) operation with a low operating current of around 120 - 140 mA has been achieved. In addition, the lasers have operated for over 1000 hours even at 70 degree(s)C, 80 mW.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Akihiro Shima, Motoharu Miyashita, Zempei Kawazu, Harumi Nishiguchi, Motoko Sasaki, Yoshihisa Tashiro, Tetsuya Yagi, Etsuji Omura, and Yoshihiro Kokubo "High-efficiency and high-power laser diodes for CD-R/RW and DVD-RAM/RW", Proc. SPIE 4287, In-Plane Semiconductor Lasers V, (6 June 2001);

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