Journal article ยท Ahead of Print article
Broadband optical frequency comb generation with flexible frequency spacing and center wavelength
Harbin Institute of Technology1
Department of Photonics Engineering, Technical University of Denmark2
Ultra-fast Optical Communication, Department of Photonics Engineering, Technical University of Denmark3
Centre of Excellence for Silicon Photonics for Optical Communications, Centers, Technical University of Denmark4
A broad-band optical frequency comb with flexible frequency spacing and center wavelength is proposed and experimentally demonstrated. The proposed scheme consists of a single continuous-wave laser, cascaded Mach-Zehnder modulator (MZM) and phase modulator (PM), two-stage dispersion-flattened highly nonlinear fibers (DF-HNLFs) and a single-mode fiber (SMF) in between.
A narrow-band frequency comb is generated in the MZM and PM and a broad-band frequency comb is achieved by self-phase modulation (SPM) based spectral broadening in DF-HNLFs. Since the DF-HNLF has low dispersion over a wide wavelength range, the central wavelength of the generated frequency comb can be tuned from 1535 nm to 1564 nm.
In addition, the central wavelength of frequency comb has a potential to be extended to L-band according to the dispersion profile of the DF-HNLF and the operation bandwidths of the MZM and PM. By tuning the driving radio-frequency (RF) signal, the frequency spacing of the generated frequency comb can be tuned.
In the experiment, the frequency spacing of 25 GHz and 40 GHz has been achieved.
Language: | English |
---|---|
Publisher: | IEEE |
Year: | 2018 |
Pages: | 1-1 |
ISSN: | 19430647 and 19430655 |
Types: | Journal article and Ahead of Print article |
DOI: | 10.1109/JPHOT.2018.2832842 |
ORCIDs: | Hu, Hao |