Offset lock with a 440-GHz range using electro-optic modulation

Zhou, Ocean; Neely, Andrew O.; Pagel, Zachary R.; Bernstein, Madeline; Roth, Jack; Mueller, Holger

doi:10.1364/OPTCON.474038

Offset lock with a 440-GHz range using electro-optic modulation

Journal Article · Mon May 01 00:00:00 EDT 2023 · Optics Continuum

DOI:https://doi.org/10.1364/OPTCON.474038· OSTI ID:1972503

; Neely, Andrew O.; Pagel, Zachary R.; Bernstein, Madeline; Roth, Jack; Mueller, Holger

Offset locking is crucial to many physics experiments. Wide range offset locks are desirable, as they increase the span of usable frequencies in an experiment. Here, we experimentally realize a wide-range offset lock using a beat-note setup combined with electro-optic phase modulation. By using frequency down-conversion of the beat note and locking to sidebands generated by electro-optic modulation, we achieve an offset range of ± 220.1 GHz with offset frequency fluctuations under 0.1 Hz and a phase error variance of 0.017 rad ² over a 100 kHz bandwidth, greatly widening the range compared to past setups using this method. The relative simplicity of our setup provides a compelling method for locking at offsets in the hundreds of GHz range.

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Sponsoring Organization:: USDOE

OSTI ID:: 1972503

Journal Information:: Optics Continuum, Journal Name: Optics Continuum Journal Issue: 5 Vol. 2; ISSN 2770-0208

Publisher:: Optical Society of AmericaCopyright Statement

Country of Publication:: United States

Language:: English

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