Abstract

We experimentally demonstrate a new approach for the generation of widely spaced flexible optical frequency combs in a highly nonlinear fiber (HNLF) using relatively low-speed components. A cavity-less 10-GHz optical pulse source is passively multiplied to 50 GHz via the fractional temporal Talbot effect. The repetition rate multiplied pulse train then propagates in an HNLF together with a continuous-wave probe laser to achieve comb spacing multiplication through cross-phase modulation. Numerical study shows that the timing jitter of the initial 10-GHz optical pulse induces insignificant excess phase noise at high-frequency offset relative to the optical comb lines, which favors a low phase noise wideband frequency comb generation. The spectral linewidth of the central 17 comb lines are characterized, exhibiting well-preserved linewidth quality as the probe laser. Furthermore, the tunability of the generated comb, relevant from a practical perspective, is analyzed by means of conversion efficiency. Finally, the central 11 comb lines are individually modulated by Nyquist-shaped 32 GBaud 16 quadratic-amplitude modulation signals, demonstrating the applicability of the comb source in providing optical carriers for a coherent transmitter.

© 2018 IEEE

PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription