Coherent light generators – Particular active media – Semiconductor
Patent
1996-07-18
1998-04-28
Davie, James W.
Coherent light generators
Particular active media
Semiconductor
372 46, 372 96, H01S 319
Patent
active
057455155
ABSTRACT:
A laser is manufactured with an increasing absorption layer disposed within one of the mirrors of the laser. The increasing absorption layer exhibits an increasing absorption coefficient in response to increasing current through the laser by increasing the temperature or carrier concentration of the layer. The increasing absorption coefficient of the increasing absorption layer prevents the output power from the laser from exceeding a preselected magnitude. The absorption coefficient of the increasing absorption layer increases as a function of increasing current and eventually quenches the operation of the laser to provide an inherently eye-safe laser. The laser may also exploit the increasing absorption layer to exhibit optical gating, switching or bistability. In a preferred embodiment of the present invention, the laser is a vertical cavity surface emitting laser.
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Marta Teresa M.
Morgan Robert A.
Davie James W.
Honeywell Inc.
Lanyi William D.
Norris Roland W.
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