Optical spectrum analyzer

Optical waveguides – Integrated optical circuit

Reexamination Certificate

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Details

C385S024000, C385S031000

Reexamination Certificate

active

06915030

ABSTRACT:
An optical spectrum analyzer for analyzing at least n wavelengths of light is disclosed having a tunable filter with an input port and an output port and a periodic output response with a free spectral range FSRand having a bandwidth B. An AWG is optically coupled to receive light from the output port; and for distributing the light spatially at other locations in a wavelength dependent manner. Optically coupled with the AWG are m detectors for detecting wavelength or channel information. The number of detectors, m is less than n when a single detector is associated with a single channel; and m is less than 2n when two detectors are associated with a single channel.

REFERENCES:
patent: 5617234 (1997-04-01), Koga et al.
patent: 2001/0031113 (2001-10-01), Frish et al.
patent: 2002/0015554 (2002-02-01), Oguma et al.
patent: 2004/0033004 (2004-02-01), Welch et al.
patent: 2004/0208428 (2004-10-01), Kikuchi et al.

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