Optics: measuring and testing – By light interference – Spectroscopy
Reexamination Certificate
2006-07-11
2006-07-11
Lee, Hwa (Andrew) (Department: 2877)
Optics: measuring and testing
By light interference
Spectroscopy
C356S519000, C372S032000, C372S029021
Reexamination Certificate
active
07075656
ABSTRACT:
A method for locking the wavelength of a laser uses a non-planar etalon, for example a non-parallel etalon, to produce a periodic spatial interference pattern, typically in the light reflected from the non-planar etalon. At least three different portions of the interference pattern are detected to generate at least three respective detection signals. A feedback signal is generated using the detection signals, and the operating wavelength of the laser is adjusted in response to the feedback signal.
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ADC Telecommunications Inc.
Carlson, Caspers Vandenburgh & Lindquist
Lee Hwa (Andrew)
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