40-GHz $S$ -and $L$ -Band Dual-Wavelength Pulse Source Using Fiber Optical Parametric Oscillator

We demonstrate a 40-GHz dual-wavelength pulse source in S-and L-band on the basis of harmonically mode-locked fiber optical parametric oscillator. Through leveraging, a 150-m highly-nonlinear dispersion-shifted fiber with a positive β⁽⁴⁾, good quality, and low timing jitter pulse trains in both S- and L-band can be generated simultaneously. Its tuning range is as wide as 71 nm, from 1507 to 1542 nm and from 1570 to 1606 nm, with a wavelength span of ~100 nm. The proposed scheme has the potential to become an efficient high repetition rate pulse source for optical communication beyond conventional wavelength band.