Yanyi Jiang et al 2005 Metrologia 42 304 doi:10.1088/0026-1394/42/4/016
Yanyi Jiang1, Zhiyi Bi1, Lennart Robertsson2 and Long-Sheng Ma1,2,3
Show affiliationsWe demonstrate a simplified set-up for control of the carrier-envelope offset frequency (fceo) in a Ti : sapphire femtosecond laser frequency comb. A periodically poled KTiOPO4 crystal is used for second harmonic generation with zero walk-off angle, which enables collinear propagation of beating beams in the self-referencing set-up. A beat signal with a signal-to-noise ratio of more than 40 dB can be obtained within a 300 kHz bandwidth. Using this signal, fceo could be tracked to a frequency synthesizer within a few millihertz for an averaging time of 1 s, which contributed a relative stability of 8 × 10−18 in the visible region around 532 nm.
42.55.Rz Doped-insulator lasers and other solid state lasers
42.60.Lh Efficiency, stability, gain, and other operational parameters
42.65.Ky Frequency conversion; harmonic generation, including higher-order harmonic generation
42.65.Re Ultrafast processes; optical pulse generation and pulse compression
Issue 4 (August 2005)
Received 31 January 2005
Published 24 June 2005
Yanyi Jiang et al 2005 Metrologia 42 304
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