Temperature-compensated cryogenic Fabry-Perot cavity

E.K. Wong, M. Notcutt, C.T. Taylor, Anthony Mann, David Blair

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We show that temperature compensation based on differential thermal expansion between sapphire and fused silica can be used to create a Fabry-Perot cavity viith 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 x 10(-10) K-2, both of which were consistent with the model. (C) 1997 Optical Society of America.
Original languageEnglish
Pages (from-to)8563-8566
JournalApplied Optics
Issue number33
Publication statusPublished - 1997


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