Stuttgart 2012 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 54: Poster 3
Q 54.26: Poster
Thursday, March 15, 2012, 16:30–19:00, Poster.I+II
Interferometric locking link between tunable cw lasers and frequency combs — •Erik Benkler1, Felix Rohde2, and Harald R. Telle1 — 1Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-38116 Braunschweig — 2Cosingno, Imagine Optic Spain S.L.,Mediterranean Technology Park av. Canal Olimpic s/n 08860 Castelldefels (Barcelona)
We present a novel transfer interferometer acting as versatile and robust optical frequency locking link between a tunable single frequency laser and an optical frequency comb. In contrast to conventional locking schemes which employ merely one single line, the signal-to-noise ratio is much superior here since substantial parts of the comb, i. e. many lines, contribute to the error signal. The set point of the control loop can be arbitrarily chosen. Thus, assuming a stabilized frequency comb (e. g via self-referencing and external standard) the frequency of the cw laser can be continuously tuned over thousands of subsequent comb lines while the frequency stability of the comb is transferred to a high degree. Fluctuations and drift effects of the transfer interferometer itself are widely eliminated with the help of a fast common mode rejection circuit. Experimental results will be presented for a tunable extended-cavity 1.5 μm laser diode linked to an Er-fiber based frequency comb.