Coherent light generators – Particular active media – Semiconductor
Patent
1996-10-16
1998-06-30
Lee, John D.
Coherent light generators
Particular active media
Semiconductor
372 46, H01S 319
Patent
active
057744874
ABSTRACT:
A Vertical-Cavity Surface Emitting Laser (VCSEL) for producing a filamented light output. In a preferred embodiment, this is accomplish by providing a number of discrete objects that are positioned adjacent to or within one or both of the cladding mirrors, or within the active region itself. The discrete objects may alter the reflectance, current injection and/or gain of the VCSEL at corresponding discrete locations, thereby causing the filamented light output. Besides providing a filamented output, the VCSEL of the present invention operates at a low drive current, provides high performance, and occupies less physical area than a broad-area (wide aperture) VCSEL. Thus, the VCSEL of the present invention has a number of advantages provided by a conventional laser including speed, efficiency and power, but does not suffer from many of the disadvantages of high coherence. The utilization of speckle averaging within multi-mode fiber interconnections and CD-like spatial imaging applications are contemplated.
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Honeywell Inc.
Lee John D.
Leung Quyen Phan
MacKinnon Ian D.
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