Abstract
We demonstrate all-optical wavelength conversion at 10 Gb/s for differential phase-shift keyed (DPSK) data signals in the C-band, based on four-wave mixing (FWM) in a silicon ring resonator. Error-free operation with a system penalty of ~4.1 dB at 10⁻⁹ BER is achieved.
Highlights
We demonstrate all-optical wavelength conversion at 10 Gb/s for differential phase-shift keyed (DPSK) data signals in the C-band, based on four-wave mixing (FWM) in a silicon ring resonator
All-optical nonlinear signal processing is seen [1,2] as a key for future telecommunication networks to overcome the electronic bandwidth bottlenecks as systems evolve towards 640Gb/s [3], Terabit Ethernet [4], and beyond [5,6]
It has been successfully demonstrated in a number of platforms such as semiconductor optical amplifiers (SOAs) [9] and highly nonlinear silica fiber (HNLF) [10]
Summary
All-optical nonlinear signal processing is seen [1,2] as a key for future telecommunication networks to overcome the electronic bandwidth bottlenecks as systems evolve towards 640Gb/s [3], Terabit Ethernet [4], and beyond [5,6]. All optical wavelength conversion is one of the key operations in multi-channel optical communications since it offers the advantages of high-speed and both modulation format and bit rate transparency [7,8] It has been successfully demonstrated in a number of platforms such as semiconductor optical amplifiers (SOAs) [9] and highly nonlinear silica fiber (HNLF) [10]. We demonstrate all-optical wavelength conversion on a 10Gb/s (33% Return-to-Zero) DPSK pseudorandom bit sequence (PRBS) data stream in the C-band via cavity-enhanced four wave mixing (FWM) in an integrated silicon ring resonator with a Qfactor of ~10,000, a free spectral range (FSR) of ~100 GHz and a full-width at half-maximum (FWHM) of ~20 GHz. We perform bit error ratio measurements and achieve error free operation with a system penalty of ~4.1dB at 10−9 BER using 30 mW of CW pump power. This is the highest bit-rate to date for which all-optical signal processing has been demonstrated with full system penalty measurements based on ring resonator structures, and illustrates that effective enhancement of nonlinear optical processes can be obtained through the use of resonant structures up to these data rates
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