| Original Articles |
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Amplitude Regenerative Characteristics of RZ-DPSK Wavelength Converter Based on Four-Wave Mixing in SOA |
| JIANG Huan;WEN He;HAN Liu-Yan;GUO Yi-Li; ZHANG Han-Yi |
| Department of Electronic Engineering, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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JIANG Huan, WEN He, HAN Liu-Yan et al 2008 Chin. Phys. Lett. 25 1697-1700 |
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Abstract We investigate the phase-preserving amplitude regenerative characteristics of the return-to-zero (RZ) differential-phase-shift-keying (DPSK) wavelength conversion based on four-wave mixing (FWM) in a semiconductor optical amplifier (SOA). The Q-factor and the optical signal-to-noise ratio (OSNR)
before and after conversion are experimentally obtained and analysed in different input noise power levels. In both the continuous-wave and synchronous clock pumping cases, we find that there is amplitude clamping in the FWM conversion due to the gain saturation of SOA, which can suppress the amplitude fluctuation of the converted DPSK signal before and after demodulation. We have achieved 2-dB Q penalty improvement in our experiment demonstration of 10Gbit/s RZ-DPSK signal with OSNR lower than 19dB.
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| Keywords:
42.79.Nv
42.65.Ky
85.60.-q
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Received: 19 December 2007
Published: 29 April 2008
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| PACS: |
42.79.Nv
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(Optical frequency converters)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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85.60.-q
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(Optoelectronic devices)
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