Forward error correction supported 150 Gbit/s error-free wavelength conversion based on cross phase modulation in silicon

Abstract

Abstract:We build a forward error correction (FEC) module and implement it in an optical signal processing experiment. The experiment consists of two cascaded nonlinear optical signal processes, 160 Gbit/s all optical wavelength conversion based on the cross phase modulation (XPM) in a silicon nanowire and subsequent 160 Gbit/s-to-10 Gbit/s demultiplexing in a highly nonlinear fiber (HNLF). The XPM based all optical wavelength conversion in silicon is achieved by off-center filtering the red shifted sideband on the CW probe. We thoroughly demonstrate and verify that the FEC code operates correctly after the optical signal processing, yielding truly error-free 150 Gbit/s (excl. overhead) optically signal processed data after the two cascaded nonlinear processes.

Wavelength conversion of 80 Gb/s RZ-DPSK Pol-MUX signals in a silicon nanowire

“…Optimizing waveguide dimensions could result in similar loss properties for both modes and therefore improve overall performance. Nevertheless, both tributaries of the Pol-MUX signal showed a BER below 10 -6 , which is well below the standard FEC limit assuming 7% overhead [7]. Error free detection is therefore possible at a net rate of 74.8 Gb/s.…”

AlGaAs-On-Insulator Nanowire with 750 nm FWM Bandwidth, -9 dB CW Conversion Efficiency, and Ultrafast Operation Enabling Record Tbaud Wavelength Conversion

“…In the 1.28-Tbit/s transmitter, the 10-GHz pulse train is generated from a mode-locked laser and then compressed by self-phase modulation [14]. The generated short pulses are DPSK modulated by a 10-Gbit/s FEC (6.6% overhead) coded data pattern in a Mach-Zehnder modulator (MZM) [15]. The modulated 10-Gbit/s DPSK signal is multiplexed in time to 1.28 Tbit/s using a passive fiber-delay multiplexer (MUX ×128).…”

Materials and Structures for Nonlinear Photonics

“…For this they used rather fat and thick Si core (300 nm tall and 500 nm wide) and operated with the TM mode. The work of Denmark Technical University group is also remarkable in that ultra-high bit rate signals were processed in a nominal Si nanowire without incurring TPA and associated FCA problems [42]. They demonstrated the wavelength conversion of 640 Gbit/s signal by low-power 4WM in a 3.6-mm long silicon waveguide with a switching energy of ~110 fJ/bit, which is low enough to reduce nonlinear absorption.…”