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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 22 — Nov. 4, 2013
  • pp: 26352–26362

The coherent gradient sensor for film curvature measurements at cryogenic temperature

Cong Liu, Xingyi Zhang, Jun Zhou, Youhe Zhou, and Xue Feng  »View Author Affiliations


Optics Express, Vol. 21, Issue 22, pp. 26352-26362 (2013)
http://dx.doi.org/10.1364/OE.21.026352


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Abstract

Coherent Gradient Sensor (CGS) system is presented for measurement of curvatures and nonuniform curvatures changes in film-substrate systems at cryogenic temperature. The influences of the interface of refrigerator and itself on the interferograms which are accounting for the temperature effect are successfully eliminated. Based on the measurement technique, the thermal stresses (including the radial stress, circumferential stress and shear stress) of superconducting YBCO thin-film are obtained by the extended Stoney’s formula during the heating process from 30K to 150K. Take the superconducting YBCO thin film as an example, the thermal stresses of which are gained successfully.

© 2013 OSA

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.6780) Instrumentation, measurement, and metrology : Temperature
(240.0310) Optics at surfaces : Thin films
(310.4925) Thin films : Other properties (stress, chemical, etc.)

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: April 22, 2013
Revised Manuscript: June 17, 2013
Manuscript Accepted: July 8, 2013
Published: October 25, 2013

Citation
Cong Liu, Xingyi Zhang, Jun Zhou, Youhe Zhou, and Xue Feng, "The coherent gradient sensor for film curvature measurements at cryogenic temperature," Opt. Express 21, 26352-26362 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-22-26352


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