Optical analyzer and method for measuring spectral amplitude...

Details Optical analyzer and method for measuring spectral amplitude... Optical analyzer and method for measuring spectral amplitude...

2006-03-28

2006-03-28

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

By light interference

Having light beams of different frequencies

C356S451000

Reexamination Certificate

active

07019839

ABSTRACT:
An optical analyzer and method for measuring optical properties of optical signals utilizes a heterodyne architecture to measure spectral amplitude and phase of a periodically modulated input optical signal, such as an optical signal from a periodically modulated distributed feedback (DFB) laser. The spectral amplitude and phase measurements are derived from a heterodyne signal, which is produced by combining and mixing the input optical signal and a local oscillator (LO) signal. The optical spectrum that is reconstructed from the heterodyne signal includes “inner” spectral peaks that contain phase information of the input optical signal. The inner spectral peaks may be produced by an optical or electrical mixing technique. The spectral phase of the input optical signal is recovered from the inner spectral peaks of the reconstructed optical spectrum.

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patent: 1 195 927 (2002-04-01), None
patent: WO/01/48954 (2001-07-01), None

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