Position sensitive detectors in wavelength monitoring

Details Position sensitive detectors in wavelength monitoring Position sensitive detectors in wavelength monitoring

2007-07-20

2009-08-18

Lyons, Michael A (Department: 2877)

Optics: measuring and testing

By light interference

Using fiber or waveguide interferometer

C356S454000

Reexamination Certificate

active

07576867

ABSTRACT:
Particular embodiments of the present invention relate generally to wavelength monitoring in frequency doubling and other optical applications. According to one embodiment of the present invention, a system for monitoring the wavelength of a light source is provided. The system comprises a light directing section, an optical vector generator, and one or more position sensitive detectors. The optical vector generator comprises a grating coupled waveguide configured to exhibit a reflective or transmissive optical resonance effect in response to variable wavelength input light. The optical resonance effect comprises a wavelength-dependent output vector that is generated from a localized output vector area of the grating coupled waveguide in response to variable wavelength input light. The position of the localized output vector area along a dimension of the grating coupled waveguide varies with the wavelength of the variable wavelength input light. The position sensitive detector is positioned in the optical path of the wavelength-dependent output vector and is configured to facilitate generation of a signal indicative of the position of the localized output vector area along the dimension of the grating coupled waveguide. Additional embodiments are disclosed and claimed.

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