Improvement of free-spectral-range measurement for Fabry-Perot cavity using phase modulation technique
by Masato Aketagawa; Hiroshi Iwata; Tuan Quoc Banh; Kenji Hirata
International Journal of Nanomanufacturing (IJNM), Vol. 8, No. 1/2, 2012

Abstract: The free-spectral-range (FSR) of the Fabry-Perot cavity can be determined with the null method using an electric-optical modulator, a frequency modulation and the lock-in detection. In this paper, we discuss the reduction of the measurement uncertainty for the FSR. The relative measurement uncertainty (ΔFSR / FSR) of 10⁸ order has been estimated.

Online publication date: Thu, 21-Aug-2014

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