Rate doubling of a highly stable soliton source

We have proposed spectral filtering as a means of rate multiplication, emphasizing the analogy with a quartz crystal oscillator. As a demonstration, we have used a Fabry-Perot (FP) cavity to produce modulation at twice the fundamental soliton repetition rate. Modulation at any harmonic of the fundamental rate could be obtained by adjusting the FP cavity length, provided that the cavity linewidth remains narrower than the soliton repetition frequency. In particular, tuning to an odd harmonic would transmit two equal-amplitude satellite modes, which could be compressed to produce a soliton pulse stream at an odd multiple of the fundamental repetition rate