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Publication Citation: A deep-UV optical frequency comb at 205 nm

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Author(s): Scott A. Diddams; E Peters; P Fendel; S Reinhardt; T W. Hansch; T Udem;
Title: A deep-UV optical frequency comb at 205 nm
Published: May 25, 2009
Abstract: By frequency quadrupling a picosecond pulse train from a Ti:sapphire laser at 820 nm we generate a frequency comb at 205 nm with nearly bandwidth-limited pulses. The nonlinear frequency conversion is accomplished by two successive frequency doubling stages that take place in resonant cavities that are matched to the pulse repetition rate of 82 MHz. This allows for an overall efficiency of 4.5 % and produces an output power of up to 70 mW for a few minutes and 25 mW with continuous operation for hours. Such a deep UV frequency comb may be employed for direct frequency comb spectroscopy in cases where it is less efficient to convert to these short wavelengths with continuous wave lasers.
Citation: Optics Express
Volume: 17
Issue: 11
Pages: pp. 9183 - 9190
Keywords: ultraviolet laser;frequency comb;nonlinear optics
Research Areas: Physics, Optical Technology, Optical Physics
PDF version: PDF Document Click here to retrieve PDF version of paper (298KB)