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Applied Optics

Applied Optics


  • Vol. 36, Iss. 33 — Nov. 20, 1997
  • pp: 8563–8566

Temperature-compensated cryogenic Fabry–Perot cavity

Eng K. Wong, Mark Notcutt, Colin T. Taylor, Anthony G. Mann, and David G. Blair  »View Author Affiliations

Applied Optics, Vol. 36, Issue 33, pp. 8563-8566 (1997)

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We show that temperature compensation based on differential thermal expansion between sapphire and fused silica can be used to create a Fabry–Perot cavity with an exceptionally low coefficient of thermal expansion at low temperatures. We describe the design of such a cavity that utilizes shaped fused silica mirrors and a sapphire spacer. The geometry of the fused silica mirror was designed using a finite element model to have a small platform, giving a frequency temperature turning point of 16.6 K. The measured turning point was 16.2 K and the curvature was 6 × 10−10 K−2, both of which were consistent with the model.

© 1997 Optical Society of America

Original Manuscript: January 2, 1997
Revised Manuscript: May 12, 1997
Published: November 20, 1997

Eng K. Wong, Mark Notcutt, Colin T. Taylor, Anthony G. Mann, and David G. Blair, "Temperature-compensated cryogenic Fabry–Perot cavity," Appl. Opt. 36, 8563-8566 (1997)

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