By exploiting the correlation between changes in the wavelengthand the carrier-envelope offset frequency (f_CEO) ofthe signal pulses in a synchronously pumped opticalparametric oscillator, we show that f_CEO can be stabilizedindefinitely to a few megahertz in a 333 MHz repetition-ratesystem. Based on a position-sensitive photodiode,the technique is easily implemented, requires no nonlinearinterferometry, has a wide capture range, and is compatiblewith feed-forward techniques that can enable f_CEO stabilizationat loop bandwidths far exceeding those currentlyavailable to OPO combs.
McCracken, R. A., Balskus, K., Zhang, Z., Reid, D. T., & Fleming, M. (2016). Carrier-envelope offset frequency stabilization in a femtosecond optical parametric oscillator without nonlinear interferometry. Optics Letters, 41(5), 966-969. https://doi.org/10.1364/OL.41.000966