Apparatus for synchronizing high-speed optical measurements...

Details Apparatus for synchronizing high-speed optical measurements... Apparatus for synchronizing high-speed optical measurements...

2006-04-04

2006-04-04

Nguyen, Tu T. (Department: 2877)

Optics: measuring and testing

For optical fiber or waveguide inspection

Reexamination Certificate

active

07023535

ABSTRACT:
An optical measuring apparatus includes an optical scanning system that supplies to a device under test electromagnetic energy at a plurality of periodically varying wavelengths, a measuring circuit that measures electromagnetic energy from the device under test, and a synchronizer, including a device responsive to the electromagnetic energy from the optical scanning system to provide a known response to one or more wavelengths of the electromagnetic energy to synchronize the measuring circuit with the optical scanning system. The device responsive to the electromagnetic energy may provide known absorption or transmission maxima or minima. Exemplary devices responsive to the electromagnetic energy include a wavelength reference, e.g., a gas cell, a Fabry Perot device or a device that provides a specific wavelength dependent response.

REFERENCES:
patent: 5149961 (1992-09-01), Arnold et al.
patent: 5995228 (1999-11-01), Otani et al.
patent: 6359685 (2002-03-01), Colbourne et al.
patent: 6847439 (2005-01-01), Manning et al.

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