Using a Confocal Fabry - Perot Interferometer to Analyze the Laser Frequency Stability

Research Area: Volume 6,Issue 5, Sept. 2017 Year: 2017
Type of Publication: Article Keywords: Confocal Fabry perot interferometer, Driver circuit, Free spectral range, Laser, Piezo element
  • Maithya J. Mutuku
  • Rurimo G. Kihara
  • Mutuku J. Ndisya
Journal: IJEIR Volume: 6
Number: 5 Pages: 191-198
Month: September
ISSN: 2277-5668
The design and fabrication of confocal Fabry perot interferometer (CFPI) is presented. It consists of three parts a central part, a fixed end where a piezo element is fitted and an adjustable end. One of the mirrors is glued to the piezo element and the other mirror is fixed to the adjustable end by use of a Teflon material. A piezo element driven by a triangular wave voltage results in an oscillating movement of the mirror, hence altering slightly the length of the cavity. At resonance a standing wave is formed in the cavity causing an amplified output as the piezo changes the length of the cavity.

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