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

Dec 2, 2014
8 pages
Published in:
  • Appl.Phys.B 119 (2015) 233-240
e-Print:

Citations per year

2020202120222023102
Abstract: (arXiv)
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 6\geq 6 MHz and a dynamic range of 700\geq 700 MHz. The free running laser system has a power spectral density (PSD) 100\leq 100 Hz2^{2}/Hz centered mainly in the acoustic frequency range. A highly tunable, 0.51.30.5-1.3 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.