Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1992-01-31
1993-12-07
Turner, Samuel A.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
356 731, 356345, G01B 902
Patent
active
052687414
ABSTRACT:
An optical coherence-domain reflectometry system provides an interferometer driven by a broadband incoherent light source with the device under test connected to one arm of the interferometer and a movable scanning mirror in the other arm providing a reference signal. The mirror moves at a controlled velocity to produce a Doppler shift in the reference signal frequency. The interference signal is detected and measured by a receiver. In the case where the receiver is a polarization diversity receiver, an intensity modulator and a polarization controller are incorporated into the reflectometer for use in calibrating the receiver. Calibration is also provided for a single photodetector receiver.
REFERENCES:
patent: 4076423 (1978-02-01), Bates
patent: 5072111 (1991-12-01), Gilino
Chou Harry
Sorin Wayne V.
Hewlett--Packard Company
Keesee LaCharles
Milks, III William C.
Turner Samuel A.
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