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Q: Quantenoptik und Photonik

Q 20: Poster Fallen & Kühlung

Q 20.17: Poster

Montag, 7. März 2005, 11:00–12:30, Poster HU

A low cost scheme for transferering frequency stability over nm intervals — •Kai Jentson — Institut für Laser-Physik, Luruper Chaussee 149, 22761 Hamburg

In the course of experiments in laser cooling in a high finesse cavity, we encouter the problem of transferring the frequency stability of a diode laser across the several nm wide frequency intervall. The 780 nm output of a diode laser is stabilized to a longitudinal mode of a high finesse (100.000, 50 kHz line width) referenz cabity RC1 by a fast (4 Mhz bandwidth) injection current feedback. The cavity RC1 is stabilized by means of a PZT-mounted mirror to the output of a second diode laser emitting at 786 nm wich itself is stabilized to a second high finesse (180.000 , 20 kHz line width) referenz cavity RC2 by a fast injection current feedback. Spectroscopy of RC2 with the 780 nm diode gives us information on the achieved relative frequenzy stability of the two diodes.