Journal article · 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 |
