Title:
TRANSMISSION DETECTION FOR VERTICAL CAVITY SURFACE EMITTING LASER POWER MONITOR AND SYSTEM
Document Type and Number:
WIPO Patent Application WO2001080324
Kind Code:
A3
Abstract:
A power monitor for a light emitter uses an absorptive material placed in the path of the application beam. The absorptive has a measurable characteristics thereof altered by an intensity of the light beam, the absorptive material being thin enough to allow a poriton of the light beam sufficient for a desired application to be passed to the desired application. Preferably, an anti-reflective coating is placed between the absorptive material and the light emitting device. The absorptive material may be formed directly on the light emitting device or may be formed on or integrated with a spacer.
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Inventors:
MORRIS JAMES E JR (US)
FELDMAN MICHAEL R (US)
HAN HONGTAO (US)
FELDMAN MICHAEL R (US)
HAN HONGTAO (US)
Application Number:
PCT/US2001/011794
Publication Date:
March 28, 2002
Filing Date:
April 11, 2001
Export Citation:
Assignee:
DIGITAL OPTICS CORP (US)
MORRIS JAMES E JR (US)
FELDMAN MICHAEL R (US)
HAN HONGTAO (US)
MORRIS JAMES E JR (US)
FELDMAN MICHAEL R (US)
HAN HONGTAO (US)
International Classes:
G02B6/42; H01L33/00; H01S5/183; H01S5/026; (IPC1-7): H01L33/00; H01S5/026
Domestic Patent References:
| WO2000013051A1 | 2000-03-09 | |||
| WO2001073903A2 | 2001-10-04 |
Foreign References:
| US6037644A | 2000-03-14 | |||
| EP0899835A1 | 1999-03-03 | |||
| US4292512A | 1981-09-29 |
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