Ultra-high-speed optical serial-to-parallel data conversion by time-domain optical Fourier transformation in a silicon nanowire

Abstract

Abstract:We demonstrate conversion from 64 × 10 Gbit/s optical timedivision multiplexed (OTDM) data to dense wavelength division multiplexed (DWDM) data with 25 GHz spacing. The conversion is achieved by time-domain optical Fourier transformation (OFT) based on four-wave mixing (FWM) in a 3.6 mm long silicon nanowire. A total of 40 out of 64 tributaries of a 64 × 10 Gbit/s OTDM-DPSK data signal are simultaneously converted with a bit-error rate (BER) performance below the 2 × 10 −3 FEC limit. Using a 50 m long highly nonlinear fiber (HNLF) for higher FWM conversion efficiency, 43 tributaries of a 64 × 10 Gbit/s OTDM-OOK data signal are converted with error-free performance (BER<10 −9 ). ©2011 Optical Society of America

Real-time Optical Demultiplexing with the Chirped Pulses

“…The time-broadened pulses are used as the sampling pulses, and delivered into a span of highly nonlinear fiber (HNLF). During the parametric process [21,23,24], the chirped pulses will modulate the phase of the idler signal as where A i (t), A p (t), and A s, n (t) (n = 1, 2, ..., 8) are the idler signal, the pump pulses, and the copies, respectively. Thus, the phase of the idler signal is as following:…”

An Introduction to Nonlinear Integrated Photonics: Structures and Devices

“…Optical signal processing techniques employ a wide range of devices and various nonlinearities to achieve multiple network functionalities. Widely used functionalities demonstrated in nonlinear photonic circuits (PICs) include wavelength [ 31 , 32 , 33 , 34 , 35 ] and format conversions [ 36 , 37 ], routing [ 38 , 39 ], phase-sensitive amplification [ 40 ], optical multiplexing and demultiplexing [ 41 , 42 , 43 , 44 , 45 ], optical memory [ 46 , 47 ], all-optical tunable delay [ 48 , 49 ], and signal regeneration [ 50 , 51 ]. Thus far, most of the existing OSP research has relied on third-order nonlinearities, such as four-wave mixing (FWM), self-phase modulation (SPM), and cross-phase modulation (XPM) [ 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 ].…”

“…Specifically, information multiplexed in the time domain through optical time demultiplexing (OTDM) can be converted into parallel lower-data-rate wavelength or spatial channels. This process has been achieved utilizing FWM, whereby a relatively low repetition rate pump switches out temporally multiplexed channels by converting them to new wavelengths (the idler in the FWM process) [ 41 , 42 , 43 ]. There are, of course, other routes that can be followed to increase transmission bandwidth and/or to develop advanced processing chips.…”