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Proceedings Paper

High power DFB lasers for D1 and D2 caesium absorption spectroscopy and atomic clocks
Author(s): A. Klehr; H. Wenzel; O. Brox; F. Bugge; G. Erbert; T.-P. Nguyen; G. Tränkle
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Paper Abstract

Distributed feedback ridge-waveguide lasers, emitting up to 250 mW in a single lateral and longitudinal mode at 852 nm and 894 nm are presented. A threshold current of 40 mA and a differential quantum efficiency of 1 W/A is achieved. The distributed feedback is provided by a second order grating, formed into an InGaP/GaAs/InGaP multilayer structure. Owing to the stable lasing frequency, the large side mode suppression ratio (>40 dB) and the small spectral line width (<500 kHz) the lasers are well suited for atomic clocks and Caesium D1 and D2 spectroscopy. This was verified by the measurement of the hyperfine structure of the Caesium lines.

Paper Details

Date Published: 29 January 2008
PDF: 10 pages
Proc. SPIE 6909, Novel In-Plane Semiconductor Lasers VII, 69091E (29 January 2008); doi: 10.1117/12.761092
Show Author Affiliations
A. Klehr, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
H. Wenzel, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
O. Brox, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
F. Bugge, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
G. Erbert, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
T.-P. Nguyen, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)
G. Tränkle, Ferdinand-Braun-Institut für Höchstfrequenztechnik (Germany)


Published in SPIE Proceedings Vol. 6909:
Novel In-Plane Semiconductor Lasers VII
Alexey A. Belyanin; Peter M. Smowton, Editor(s)

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