Development of narrow linewidth, micro-integrated extended cavity diode lasers for quantum optics experiments in space
Appl. Phys. B, vol. 111, no. 2, pp. 255-260 (2013).
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We present a micro-integrated extended cavity diode laser module for experiments on rubidium Bose-Einstein condensates and atom interferometry at 780.24 nm onboard a sounding rocket. The micro-integration concept is optimized for space application. The laser chip, micro-lenses, a volume holographic Bragg grating, micro-temperature sensors and a micro-thermoelectric cooler are integrated on an aluminium nitride ceramic micro-optical bench with a foot print of only 50 × 10 mm2. Moveable parts are omitted to allow for a very compact and robust design. The laser module provides an output power of more than 120 mW at a short term (170 µs) linewidth of 54 kHz, both full-width-at-halfmaximum. The laser can be coarsely tuned by 44 GHz with a continuous tuning range of 31 GHz. The micro-integration technology presented here can be transferred to other wavelengths.
1 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany
2 Institut für Physik, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
3 Institut für Experimentalphysik, Universität Düsseldorf, 40225 Düsseldorf, Germany