A continuously tunable modulation scheme for precision control of optical cavities with variable detuning
William Yam, Emily Davis, Sarah Ackley, Matthew Evans, Nergis, Mavalvala
TL;DR
This paper introduces a versatile modulation scheme using an electro-optic modulator to precisely control optical cavities with arbitrary detuning, enabling stable locking even far from resonance.
Contribution
The scheme allows for continuous tuning and arbitrary amplitude-phase modulation ratios, improving cavity locking flexibility beyond existing methods.
Findings
Successful demonstration on a Fabry-Perot cavity
Generation of a linear error signal at large detunings
Enhanced control over cavity detuning
Abstract
We present a scheme for locking optical cavities with arbitrary detuning many line widths from resonance using an electro-optic modulator that can provide arbitrary ratios of amplitude to phase modulation. We demonstrate our scheme on a Fabry-Perot cavity, and show that a well-behaved linear error signal can be obtained by demodulating the reflected light from a cavity that is detuned by several line widths.
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Taxonomy
TopicsAdvanced Fiber Laser Technologies · Quantum optics and atomic interactions · Photonic and Optical Devices