Robust wavelength locker for control of laser wavelength

Details Robust wavelength locker for control of laser wavelength Robust wavelength locker for control of laser wavelength

2006-05-02

2006-05-02

Lee, Andrew H. (Department: 2877)

Optics: measuring and testing

By light interference

Spectroscopy

Reexamination Certificate

active

07038782

ABSTRACT:
An apparatus 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 etalon. The apparatus also uses a detector to detect the spatial interference pattern having at least three separate detector elements, commonly referred to as pixels. The etalon and the detector are matched to each other so that adjacent pixels detect a specific portion of the phase of the periodic interference pattern.

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