Abstract
The intensity noise and mode-locking phenomena of a hybrid soliton pulse source (HSPS) utilising different fibre Bragg gratings (FBGs) with or without linear chirp are described. The HSPS is modelled by a time-domain solution of the coupled-mode equations including spontaneous emission noise, and relative intensity noise (RIN) is calculated using numerical solutions of these equations. It is found that a noise peak in the RIN spectrum does not occur at the inverse of the round-trip time in the compound cavity for unchirped FBGs not giving transform-limited pulses around the fundamental mode-locking frequency. A noise peak occurs at the inverse of the round-trip time in the compound cavity for chirped FBGs generating transform-limited pulses over a wide tuning range around the fundamental mode-locking frequency. It is also found that the proper mode-locking range over which transform-limited pulses are obtained reduces for chirped FBGs with increasing noise, whereas generated transform-limited pulses for unchirped FBGs do not depend on the magnitude of noise and these FBGs can give transform-limited pulses only over a limited tuning range with low and high noise.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.