Development of narrow linewidth, micro-integrated extended cavity diode lasers for quantum optics experiments in space

E. Luvsandamdin1, S. Spießberger1, M. Schiemangk1,2, A. Sahm1, G. Mura3, A. Wicht1,2, A. Peters1,2, G. Erbert1, G. Tränkle1

Published in:

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