We measure the carrier envelope offset (CEO) frequency of the mid-infrared frequency comb (wavelength tunable between 3 and 6 μm) from a doubly resonant nondegenerate synchronously pumped optical parametric oscillator (SPOPO) as a function of the CEO frequency of the Tm-fiber pump laser. We show that the CEO frequency of the SPOPO signal wave is a linear function of the CEO frequency of the pump laser, with a slope determined by the signal to pump center-frequency ratio.
© 2013 Optical Society of America
Original Manuscript: January 21, 2013
Revised Manuscript: March 6, 2013
Manuscript Accepted: March 7, 2013
Published: April 1, 2013
Kevin F. Lee, Jie Jiang, C. Mohr, J. Bethge, M. E. Fermann, Nick Leindecker, Konstantin L. Vodopyanov, Peter G. Schunemann, and I. Hartl, "Carrier envelope offset frequency of a doubly resonant, nondegenerate, mid-infrared GaAs optical parametric oscillator," Opt. Lett. 38, 1191-1193 (2013)