Design for manufacture of micromachined fabry—pérot cavity-based sensors
✍ Scribed by Youngmin Kim; Dean P. Neikirk
- Publisher
- Elsevier Science
- Year
- 1995
- Tongue
- English
- Weight
- 470 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0924-4247
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## Abstract A quadrature phase‐shifted white‐light interferometry is demonstrated to interrogate short‐cavity extrinsic Fabry–Perot interferometric (EFPI) sensors. The absolute cavity length of an EFPI can be recovered by constructing two quadrature signals using the white‐light spectrum of the EFP
This paper describes the design criteria and construction of a compact Fabry-Perot cavity spectrometer with frequency modulation (FM) signal recovery, for use in the 70-220 GHz region. A solid state Gunn oscillator was frequency locked to a radiofrequency synthesiser and used as the primary source.