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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Editor: Zhizhan Xu
  • Vol. 10, Iss. 9 — Sep. 1, 2012
  • pp: 091201–091201

Real-time measurement of retardation of eighth-wave plate independent of fast-axis direction

Ruifang Fang, Aijun Zeng, Longhai Liu, Linglin Zhu, and Huijie Huang  »View Author Affiliations


Chinese Optics Letters, Vol. 10, Issue 9, pp. 091201-091201 (2012)


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Abstract

A real-time measurement method for the retardation of an eighth-wave plate is proposed. The collimated laser beam is split using a Glan Taylor polarizer with two side escape windows. The reflected sub-beam is detected using a detector, whereas the transmitted sub-beam passes through the quarter-wave plate and the eighth-wave plate of interest. Then, it is reflected by the mirror and passes reversely through the eighth- and quarter-wave plates. Finally, it is analyzed using the Glan Taylor polarizer and detected using another detector. With two detection signals, the retardation is resolved and found to be independent of the fast-axis direction, initial intensity, and circuit parameters. In the experiment, a crystal quartz sample is measured at different fast-axis angles. The standard deviation of the retardation is 0.9°. The usefulness of the method is verified.

© 2012 Chinese Optics Letters

OCIS Codes
(120.5410) Instrumentation, measurement, and metrology : Polarimetry
(230.4110) Optical devices : Modulators
(260.5430) Physical optics : Polarization

ToC Category:
Instrumentation, Measurement, and Metrology

Citation
Ruifang Fang, Aijun Zeng, Longhai Liu, Linglin Zhu, and Huijie Huang, "Real-time measurement of retardation of eighth-wave plate independent of fast-axis direction," Chin. Opt. Lett. 10, 091201-091201 (2012)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-10-9-091201


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