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Interferometry

Self-calibrating hybrid wavelength, polarization, and time-multiplexed heterodyne interferometers for Angstrom precision measurements

[+] Author Affiliations
Nabeel A. Riza, Muzammil A. Arain, Farzan N. Ghauri

University of Central Florida, Photonics Information Processing Laboratory, College of Optics and Photonics, Center for Research and Education in Optics and Lasers, 4000 Central Florida Boulevard, Orlando, Florida 32816-2700

Opt. Eng. 45(12), 125603 (December 19, 2006). doi:10.1117/1.2404680
History: Received January 27, 2006; Revised May 07, 2006; Accepted May 11, 2006; Published December 19, 2006
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Propose here unique wavelength and hybrid wavelength-polarization and wavelength-polarization-time-multiplexed heterodyne optical interferometers using an internal self-referencing scheme enabling Angstrom level sensitivity optical path-length measurements. As a first step, a proof-of-concept wavelength multiplexed scanning heterodyne interferometer is built to test the surface quality of a test mirror, demonstrating ±100Åprofile variations with a 0.9Å accuracy. The hybrid wavelength-polarization and wavelength-polarization-time-multiplexed interferometers can be used to form spectrally coded distributed sensors.

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© 2006 Society of Photo-Optical Instrumentation Engineers

Citation

Nabeel A. Riza ; Muzammil A. Arain and Farzan N. Ghauri
"Self-calibrating hybrid wavelength, polarization, and time-multiplexed heterodyne interferometers for Angstrom precision measurements", Opt. Eng. 45(12), 125603 (December 19, 2006). ; http://dx.doi.org/10.1117/1.2404680


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