Compact, robust, and spectrally pure diode-laser system with a filtered output and a tunable copy for absolute referencing

Abstract

We report on a design of a compact laser system composed of an extended cavity diode laser with high passive stability and a pre-filter Fabri-Perot cavity. The laser is frequency stabilized relative to the cavity using a serrodyne technique with a correction bandwidth of $\ge 6$ MHz and a dynamic range of $\ge 700$ MHz. The free running laser system has a power spectral density (PSD) $\le 100$ Hz${}^2$/Hz centered mainly in the acoustic frequency range. A highly tunable, $0.5-1.3$ GHz copy of the spectrally pure output beam is provided, which can be used for further stabilization of the laser system to an ultra-stable reference. We demonstrate a simple one-channel lock to such a reference that brings down the PSD to the sub-Hz level. The tuning, frequency stabilization and sideband imprinting is achieved by a minimum number of key elements comprising a fibered EOM (electro-optic modulator), AOM (acousto-optic modulator) and a NLTL (non-linear transmission line). The system is easy to operate, scalable, and highly applicable to atomic/molecular experiments demanding high spectral purity, long-term stability, and robustness.

References in corpus (14)

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Cited by in corpus (4)

• A new quantum gas apparatus for ultracold mixtures of K and Cs and KCs ground-state molecules
• Design of a Littrow-type diode laser with independent control of cavity length and grating rotation
• Comprehensive characterization of an apparatus for cold electromagnetic dysprosium dipoles
• Efficiency limitation for realizing an atom-molecule adiabatic transfer based on a chainwise system