15-THz Tunable Wavelength Conversion of Picosecond Pulses in a Silicon Waveguide

Abstract

Abstract-We demonstrate all-optical ultra-broadband tunable wavelength conversion of one-picosecond pulses based on four-wave mixing in a 3-millimeter long dispersion engineered silicon waveguide. In the waveguide, an input pulse with center wavelength at 1600 nm is down-converted by 135 nm (17.3 THz) to 1465 nm. A tuning range of 115 nm (15 THz, from 1465 nm to 1580 nm) of the converted wavelength is demonstrated, while keeping conversion efficiency, pulse shape and pulse width almost unchanged.

One-to-six WDM multicasting of DPSK signals based on dual-pump four-wave mixing in a silicon waveguide

“…The frequency spacing between the six multicasting channels can be tuned to comply with the ITU grid by changing the frequency spacing between the three incident waves. As silicon waveguides offer ultra-broad conversion bandwidths [8,11], the frequency spacing can be tuned over a large range covering the S-, C-, and L-bands. However, the frequency spacing still needs to be carefully chosen to avoid overlapping between the multicast and dummy channels which will cause distortions of the multicast signals.…”

“…Due to the strong light confinement in silicon waveguides with sub-micron dimensions, the group velocity dispersion (GVD), which is a critical parameter for parametric processes, can be engineered and thus one can achieve ultrabroadband wavelength conversion [8][9][10][11]. Previously, different nonlinear applications including signal regeneration [12], parametric amplification [13], wavelength conversion [14,15], ultra-fast waveform sampling, and demultiplexing [16], have been demonstrated using silicon waveguides.…”

160 Gb/s Silicon All-Optical Data Modulator based on Cross Phase Modulation

“…Based on the ultrafast Kerr effect, several functionalities and applications have been demonstrated, including signal regeneration, wavelength conversion, optical sampling and demultiplexing [7][8][9][10][11]. However, silicon based all-optical processing suffers from the slow dynamics of twophoton absorption (TPA) induced free carrier absorption (FCA).…”

Polarization Insensitive Wavelength Conversion Based on Four-Wave Mixing in a Silicon Nanowire

“…Recently, nonlinear effects in silicon nanowires have attracted considerable research interests due to compactness, large conversion bandwidth and complementary metal-oxide-semiconductor (CMOS) compatibility. Due to the strong light confinement in silicon waveguides with sub-micron dimensions, the group velocity dispersion (GVD), which is a critical parameter for parametric processes, can be engineered and thus one can achieve ultra-broadband wavelength conversion [7], [8]. Previously, different nonlinear applications including signal regeneration [9], parametric amplification [10], wavelength conversion [11], [12], ultra-fast waveform sampling, demultiplexing [13], and multicasting [14] have been demonstrated based on FWM processes in silicon nanowires.…”