Abstract

A compact optical clock and frequency comb system is presented, based on a 1GHz octave-spanning Ti:sapphire laser referenced to the F2(2)(P(7),v3) optical transition in methane at 3.39μm. The reference methane transition is accessed by a stabilized HeNe laser in a compact transportable format. The output from the octave-spanning Ti:sapphire laser is used to generate a mid-IR comb at the reference wavelength 3.39μm. Direct comparison of the stabilized optical frequency comb with an ultralow expansion glass cavity-stabilized diode laser at 674nm shows an Allan deviation of the frequency comb of 3×1014 in 20s.

© 2009 Optical Society of America

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