Grating--outcoupled surface-emitting lasers
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United States of America Patent
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Nov 11, 2008
Grant Date -
Mar 16, 2006
app pub date -
Nov 8, 2005
filing date -
Apr 28, 2000
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Abstract
Laser diodes are formed with an outcoupling grating between two separate distributed Bragg reflectors. The devices have gain regions located between the reflector gratings for pumping the active region. The outcoupling grating couples light out of the waveguide normal to the surface if the grating spacings are equal to an integer number of wavelengths of the light within the cavity. If the gratings are not such an integer number, the light is coupled out of the cavity off the normal.
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