Observations of complex frequency comb structure in a harmonically-pumped femtosecond optical parametric oscillator

Richard A. McCracken, Karolis Balskus, Zhaowei Zhang, Derryck T. Reid

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Abstract

Various schemes allow femtosecond optical parametric oscillators to produce pulses at harmonics of their pump laser repetition frequency, each apparently offering the possibility of generating widely-spaced, tunable frequency combs. Using a 100-MHz Ti:sapphire pump laser, we have compared two alternative optical parametric oscillator architectures, both leading to 300-MHz pulses but one configured in a cavity three times shorter than the pump laser and the other in a cavity one-third longer. Heterodyne measurements between the pump and each of these two systems show that they possess different carrier-envelope offset characteristics, with implications on the coherence and stabilization of the resulting combs.

Original languageEnglish
Article number012004
JournalJournal of Physics: Conference Series
Volume594
Issue number1
DOIs
Publication statusPublished - 2015

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