Stuttgart 2012 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 68: Materiewellenoptik
Q 68.4: Talk
Friday, March 16, 2012, 14:45–15:00, V53.01
Micro-integrated, narrow linewidth master-oscillator-power-amplifier laser system with 3 W output power — •Max Schiemangk1, Achim Peters1,9, and the QUANTUS Team1,2,3,4,5,6,7,8,9 — 1Institut für Physik, HU Berlin — 2Institut für Quantenoptik, LU Hannover — 3Institut für Laserphysik, Uni Hamburg — 4ZARM, Uni Bremen — 5Institut für Quantenphysik, Uni Ulm — 6MPQ, München — 7Institut für angewandte Physik, TU Darmstadt — 8Midlands Ultracold Atom Research Centre, University of Birmingham, UK — 9FBH, Berlin
We present an all-diode laser based, hybrid integrated laser module, that will be used within QUANTUS II at the Drop Tower Bremen. The 10×50 mm2 module is based on a master oscillator power amplifier (MOPA) concept. A distributed feedback (DFB) laser diode is used as master oscillator (MO), that provides narrow linewidth emission. The output of the MO is collimated by micro-lenses, passed through a micro-optical isolator to supress feedback, and injected into a power amplifier (PA) chip. The PA consists of a ridge-waveguide pre-amplifier section, that serves as a mode filter, and a tapered section, that boosts the output power to about 3 W while preserving the spectral properties. The module’s FWHM linewidth corresponds to approx. 1 MHz (10 µs time scale) and the intrinsic linewidth derived from the white noise floor of the frequency noise spectrum is below 200 kHz.
The QUANTUS project is supported by the German Space Agency DLR with funds provided by the Federal Ministry of Economics and Technology (BMWi) under grant numbers DLR 50WM1131-1137.