Abstract
Ti:Sapphire optical frequency combs have revolutionized optical frequency metrology, but they remain expensive and bulky. Though fiber-based frequency combs offer an attractive alternative, they are not yet capable of the GHz repetition rates desired for many applications including metrology, high-resolution spectroscopy and line-byline pulse shaping. We are exploring an alternative using the Yb:KYW crystal as the femtosecond laser medium. This crystal allows direct diode-pumping with very efficient laser operation in the 1030 nm−1060 nm range with pulses as short as 71 fs [1]. A Yb:KYW optical frequency comb will be inexpensive, efficient, compact, and promises repetition rates in the range of hundreds of MHz up to ~1 GHz [2].
© 2007 IEEE
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