There are increasing demands for low-power-consumption 670nm-band red-light-emitting laser diodes (LDs) in applications such as handy bar-code scanners, etc. In this paper the authors have developed low-threshold-current multi-quantum-well (MQW) LDs with a short-length-cavity and a high-reflectivity (HR) rear facet. Marked reduction in threshold currents has been achieved by using MQW as an active layer and by optimizations of cavity lengths considering temperature characteristics in a trade-off relation between low-threshold-currents and high-temperature-operations. Moreover, the reflectivity of a rear facet was increased to a maximum value (80%) where necessary monitor currents for an automatic-power-control could be maintained. For 150/spl mu/m-long LDs, threshold current was reduced to 12.6mA (1/3 of conventional LDs), maintaining sufficient temperature characteristics for 50/spl deg/C use. For 350/spl mu/m-long LDs, consumption power was reduced to 1/2 of conventional LDs and long lifetimes at 60/spl deg/C have been obtained.


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    Title :

    Low-threshold-current 670 nm multi-quantum-well laser diodes


    Contributors:
    Fujii, H. (author) / Yoshii, H. (author) / Endo, K. (author) / Kishi, T. (author) / Makita, H. (author) / Okuda, J. (author) / Yamada, H. (author)

    Published in:

    Proceedings of LEOS'94 ; 1 ; 317-318 vol.1


    Publication date :

    1994-01-01


    Size :

    177343 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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