S. H. Wang

All-Optical Multicast Switch Employing Raman-Assisted FWM in Dispersion-Shifted Fiber

We demonstrate an all-optical multicast switch with the capability to select five reconfigurable channel groups with six output multicast channels using three control wavelengths at 10 Gb/s using Raman-assisted four-wave mixing in dispersion-shifted fiber. All the output channels comply with the 100 GHz (i.e., 0.8 nm) spaced International Telecommunication Union (ITU) grid.

Noise characterization of Raman-assisted fiber optical parametric amplifiers

Raman-assisted fiber optical parametric amplifiers with approaching 3-dB noise figure can be obtained by optimizing the powers of Raman and parametric pumps because of the different polarization states of the up- and down-conversion parametric spontaneous noises.

Flat-top pulse generation based on the combined action of active mode locking and nonlinear polarization rotation

A pulsewidth tunable 10 GHz flat-top pulse train is generated based on the combined action of active mode locking and nonlinear-polarization-rotation pulse shaping. The SMSR is 65 dB and the timing jitter is 145 fs.

6.4-dB Enhancement of the Gain of a Raman-assisted Fiber Optical Parametric Amplifier Over the Sum of the Gains of Individual Amplifiers

We first reported a 6.4 dB enhancement of the gain of a hybrid Raman-assisted fiber optical parametric amplifier over the sum of the gains of the individual Raman and parametric amplifiers.

Optimal noise figure for Raman-assisted fiber optical parametric amplifiers

The noise figure of a Raman-assisted fiber optical parametric amplifier is reduced to 3.6 dB by using a fiber Bragg grating to suppress input parametric pump noise.

Wavelength Conversion using Multi-Pump Raman-assisted Four-Wave Mixing

We proposed to use multi-pump Raman amplifier to assist four-wave-mixing based wavelength conversion. We achieved a conversion efficiency bandwidth of 10 nm and power penalty of ~1 dB at BER of 10-9 at 10 Gb/s.

Optimization of SOI wire waveguide geometry for maximum continuous wave Raman gain

We numerically investigated the relationship between the transverse waveguide geometry and the continuous-wave Raman gain in silicon-on-insulator wire waveguide Raman amplifiers. A Raman gain enhancement can be achieved in waveguides with small effective mode area.

Optimization of silicon-on-insulator rib waveguide geometry for maximum continuous wave Raman gain

We numerically investigated the relationship between the transverse waveguide geometry and the continuous wave Raman gain in SOI rib waveguide Raman amplifiers. By optimizing the transverse geometric size, a Raman gain enhancement can be achieved in silicon rib waveguides with small effective carrier lifetime.

Characterization of Raman-assisted Fiber optical parametric amplifiers gain

We reported theoretical modeling of the gain of Raman-assisted fiber optical parametric amplifiers. The model can be used to design and optimize the amplifier gain.

6.4-dB small signal gain enhancement in Raman-assisted fiber optical parametric amplifiers

We reported a 6.4-dB gain enhancement of a Raman-assisted fiber optical parametric amplifier over the sum of the gains of the individual Raman and parametric amplifiers by keeping the amplifiers out of the saturation region.