All-optical pulsewidth-tunable wavelength conversion of return-to-zero differential phase-shift keying signal
- Resource Type
- Original Paper
- Authors
- Sharif, Gazi Mohammad; Nguyen-The, Quang; Matsuura, Motoharu; Kishi, Naoto
- Source
- Optical Review. August 2015 22(4):553-559
- Subject
- RZ-DPSK
Wavelength conversion
Pulsewidth-tunable operation
Raman amplifier
Four-wave mixing (FWM)
- Language
- English
- ISSN
- 1340-6000
1349-9432
We demonstrate the wavelength conversion of return-to-zero differential phase-shift keying (RZ-DPSK) signal with the pulsewidth-tunable operation using a Raman amplifier (RA)-based ultrashort pulse compressor and a highly nonlinear fiber (HNLF)-based four-wave mixing (FWM) switch. The wavelength of the input RZ-DPSK signal is converted to new wavelengths owing to the FWM effect in HNLF. On the other hand, the pulsewidth of the wavelength-converted RZ-DPSK signal is tuned from 10 to 3 ps by using the ultrashort pulse source based on RA-based adiabatic soliton pulse compression. The bit error rate characteristics of the input RZ-DPSK and the wavelength-converted RZ-DPSK signals with different pulsewidths are measured and error-free operations are achieved in all cases. The optical spectra, autocorrelation traces, and clear and opening eye diagrams show high conversion performance with wide-range pulsewidth tunability.