Simultaneous wavelength conversion of ASK and DPSK signals based on four-wave-mixing in dispersion engineered silicon waveguides

Abstract

We experimentally demonstrate four-wave-mixing (FWM)-based continuous wavelength conversion of optical differential-phase-shift-keyed (DPSK) signals with large wavelength conversion ranges as well as simultaneous wavelength conversion of dual-wavelength channels with mixed modulation formats in 1.1-cm-long dispersion-engineered silicon waveguides. We first validate up to 100-nm wavelength conversion range for 10-Gb/s DPSK signals, showcasing the capability to perform phase-preserving operations at high bit rates in chip-scale devices over wide conversion ranges. We further validate the wavelength conversion of dual-wavelength channels modulated with 10-Gb/s packetized phase-shift-keyed (PSK) and amplitude-shift-keyed (ASK) signals; demonstrate simultaneous operation on multiple channels with mixed formats in chip-scale devices. For both configurations, we measure the spectral and temporal responses and evaluate the performances using bit-error-rate (BER) measurements.

All-optical wavelength conversion based on time-domain holography

“…Wavelength division multiplexing (WDM) systems have allowed a rapid increase in the spectral efficiency of optical networks in the last decades, through the multiplexing of multiple optical channels into a single optical fiber by using different wavelengths [1]. Alloptical wavelength conversion is a fundamental process in high-speed WDM systems, ensuring full flexibility in the network, preventing wavelength blocking, and allowing highspeed operation while avoiding inefficient electro-optics conversion [2][3][4][5][6][7][8][9][10][11][12]. Recently, there has been a renewed interest in coherent technologies [1,3,4], with the aim of a further increase in the spectral efficiency of the optical telecommunications systems by means of the use of high order modulation formats.…”

“…Most of them rely on parametric nonlinear effects, such as four-wave mixing (FWM) [2][3][4][5][6][7][8]. However, FWM-based schemes present several drawbacks that limit their practical application, which include (i) the need to satisfy a stringent phase-matching condition, which either limits the wavelength conversion tunability or requires using dispersion-engineered media [3,6,13]; (ii) the need to use very high power for the involved signals (typically, >10dBm average powers) and (iii) the fact that the wavelength converted signal is phase conjugated in time with respect to the original one when using the higher efficiency configurations, e.g. one [3][4][5][6] or two [7,8] continuous wave (CW) pumps (in general, phase conjugation depends on the configuration of the pumps and signal).…”

“…However, FWM-based schemes present several drawbacks that limit their practical application, which include (i) the need to satisfy a stringent phase-matching condition, which either limits the wavelength conversion tunability or requires using dispersion-engineered media [3,6,13]; (ii) the need to use very high power for the involved signals (typically, >10dBm average powers) and (iii) the fact that the wavelength converted signal is phase conjugated in time with respect to the original one when using the higher efficiency configurations, e.g. one [3][4][5][6] or two [7,8] continuous wave (CW) pumps (in general, phase conjugation depends on the configuration of the pumps and signal). Whereas all-optical temporal conjugation of data signals is also desired for a range of operations in fiber-optics communication links [14], in order to achieve wavelength conversion of the original signal, a second conjugation process, typically another FWM stage, is required.…”

Progress on Waveguide-Integrated Graphene Optoelectronics

“…Silicon photonics has been widely studied for the applications in optical interconnects [20], optical communications [21], and nonlinear optics [22] in the past decades. However, these applications are facing many challenges.…”

Multichannel wavelength conversion of 50-Gbit/s NRZ-DQPSK signals using a quantum-dot semiconductor optical amplifier

“…Moreover, one MWC would replace many single-channel wavelength converters, resulting in a smaller footprint and lower power consumption. MWCs exploit four-wave mixing (FWM) and second-harmonic generation in various kinds of nonlinear elements such as highly nonlinear optical fibers [1−4], semiconductor optical amplifiers (SOAs) [5−7], silicon waveguides [8], and periodically poled lithium niobate (PPLN) waveguides [9,10]. In addition, a few practical applications of MWCs and their experimental use for optical packet switching have also been reported [11−13].…”