A Monolithic Filter Cavity for Experiments in Quantum Optics
Pantita Palittapongarnpim, Andrew MacRae, A.I. Lvovsky
TL;DR
This paper presents a stable, monolithic Fabry-Perot cavity made by coating a lens, serving as a narrow band filter in quantum optics with high suppression and stable operation without locking.
Contribution
The authors introduce a simple, stable monolithic cavity design that eliminates the need for optical locking in quantum optics experiments.
Findings
45 dB suppression of unwanted modes
60% transmission efficiency
Long-term mechanical stability
Abstract
By applying a high-reflectivity dielectric coating on both sides of a commercial plano-convex lens, we produce a stable monolithic Fabry-Perot cavity suitable for use as a narrow band filter in quantum optics experiments. The resonant frequency is selected by means of thermal expansion. Owing to the long term mechanical stability, no optical locking techniques are required. We characterize the cavity performance as an optical filter, obtaining a 45 dB suppression of unwanted modes while maintaining a transmission of 60%.
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