Abstract
Differential quadrature phase shift keying (DQPSK) modulation has become particularly attractive in high-speed optical communications because of its resistance to fiber nonlinearities and its more efficient use of fiber bandwidth. Because of its wavelength conversion ability, semiconductor optical amplifier (SOA) four wave mixing effect has attracted much attention. We experimentally study the FWM wavelength conversion of 40 Gb/s (20 GBd) NRZ-DQPSK data. A bulk SOA with 21 dB gain and 10 dBm output saturation power is used. The $Q$-factors of the input and wavelength converted signal are measured. Some signal regeneration properties are shown. A $Q$- factor improvement up to 1.7 dB is observed.
| Original language | English |
|---|---|
| Article number | 6651693 |
| Pages (from-to) | 2439-2441 |
| Number of pages | 3 |
| Journal | IEEE Photonics Technology Letters |
| Volume | 25 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - 15 Dec 2013 |
Keywords
- all optical wavelength conversion
- DQPSK
- four wave mixing
- phase modulation
- semiconductor optical amplifier