Ultrafast Pulse Train at a 125-THz Repetition Rate in the CW Regime

Tailored Raman-resonant four-wave-mixing processes

“…It is possible to tune phase relationships at will among the electromagnetic-field modes in question by inserting a transparent dispersive plate on an optical axis and controlling its thickness with a typical precision of several m [19,20]; provided, however, that the frequency spacings among the relevant electromagnetic-field modes are required to be very wide (typically, greater than tens of THz). This optical method has been practically applied to a linear optical process, and has demonstrated the generation of a train of ultrafast pulses having a repetition rate exceeding 100 THz in the time domain [21][22][23]. Here, we apply this optical technology to tailoring nonlinear optical process: the Raman-resonant four-wave-mixing process [1,24,25].…”