We report a new optical pumping injection cavity (OPIC) approach that combines a high pump absorbance with long pump wavelength and a thin active layer. High absorbance is achieved by tuning an etalon cavity to the pump wavelength, which brings about multiple passes of the pump beam through the active region. A 12- 1/2 period distributed Bragg reflector (DBR) consisting of alternating AlAs/sub 0.08/Sb/sub 0.92/ and GaSb layers was grown onto the GaSb substrate. The 2/spl lambda//sub pump/ central cavity consisted of a 0.51 /spl mu/m thick GaSb spacer, a 100 /spl Aring/ AlAs/sub 0.08/Sb/sub 0.92/ hole-blocking layer, a l0-period InAs/GaSb/InAs/AlAsSb (17 /spl Aring//35 /spl Aring//17 /spl Aring//44 /spl Aring/) W active region, another hole-blocking layer, and another spacer. The OPIC pump cavity was completed by a 7-period top GaSb/AlAsSb DBR. Although the OPIC is resonant in the vertical direction at /spl lambda//sub pump/, at the mid-IR wavelength, the mirror stacks function as cladding layers and the spacers function as high-index separate confinement regions. Thus the laser operates in an edge-emitting configuration. Pumping was by 107 ns pulses from a 2.098 /spl mu/m Ho:YAG laser, operating at a repetition rate of 1 Hz.


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    Title :

    Optical pumping injection cavity (OPIC) for high-efficiency mid-IR "W" lasers


    Contributors:
    Felix, C.L. (author) / Bewley, W.W. (author) / Vurgaftman, I. (author) / Olafsen, L.J. (author) / Stokes, D.W. (author) / Meyer, J.R. (author) / Yang, M.J. (author)


    Publication date :

    1999-01-01


    Size :

    195731 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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