Chris Ito

Polarization Independent All-Optical 3R Regeneration Based on the Kerr Effect in Highly Nonlinear Fiber and Offset Spectral Slicing

A detailed experimental characterization of a polarization-independent all-optical 3R regenerator is presented. The regenerator is comprised of a self-pulsating distributed feedback laser for clock recovery, cross-phase modulation in a highly nonlinear fiber (HNLF) and offset spectral slicing for retiming, and self-phase modulation in an HNLF and offset spectral slicing for reshaping. A key feature of the regenerator is that polarization-independent operation is achieved without additional complexity as compared to a conventional polarization-dependent implementation. The regenerator performance is assessed for important properties of the input signal, including the optical signal-to-noise ratio, waveform distortion due to residual group velocity dispersion and polarization mode dispersion, state-of-polarization, power, and wavelength. With careful attention to key design parameters, excellent performance is achieved.

Polarization Independent All-Optical Retiming Based on Cross-Phase Modulation and Spectral Slicing

Polarization independent all-optical retiming is demonstrated experimentally at 10 Gb/s using a self-pulsating DFB laser and cross-phase modulation in a highly nonlinear fiber. Regardless of its state-of-polarization, the timing jitter of retimed data signal is less than 2 ps. copy2006 Optical Society of America

All-Optical 3R Regeneration using Higher-Order Four-Wave Mixing in a Highly Nonlinear Fiber with a Clock-Modulated Optical Pump Signal

10 Gb/s all-optical 3R regeneration based on a self-pulsating laser and higher-order four-wave mixing in a highly nonlinear fiber achieved receiver sensitivity improvements of up to 7.5 dB for degraded optical signal-to- noise ratio and 7.8 dB for residual dispersion

Design Considerations for Polarization-Independent All-Optical Retiming Based on Cross-Phase Modulation and Spectral Slicing

Polarization-independent all-optical retiming is demonstrated experimentally at 10 Gb/s using a self-pulsating distributed feedback laser, cross-phase modulation in a highly nonlinear fiber, and spectral slicing. With careful attention to key design parameters, excellent performance is achieved without additional complexity compared to a conventional polarization-dependent implementation.

Optical 3R regeneration using a clock-modulated pump and higher-order four-wave mixing

In the 3R signal, the use of a clock-modulated pump reduced timing jitter by up to 5.8 ps and reduced inter-symbol interference. Receiver sensitivity improvements of up to 5.0 dB and 10.9 dB were also obtained for signals degraded by ASE noise and dispersion, respectively

Input Power Dynamic Range of a Polarization Independent All-Optical 3R Regenerator

The input power dynamic range is investigated for a polarization independent all-optical 3R regenerator based on cross- and self-phase modulation in highly nonlinear fibers. The performance is assessed in terms of the jitter, extinction ratio, signal-to-noise ratio, and receiver sensitivity.

Polarization Insensitive 3R Regeneration of PMD Distorted Signals using Higher-Order Four-Wave Mixing in Highly Nonlinear Fiber

Using higher-order four-wave mixing in a highly nonlinear fiber, significant improvements in receiver sensitivity are demonstrated for a polarization insensitive 3R regenerator in the presence of first-order polarization mode dispersion.

The regenerative properties of using a clock-modulated pump in higher-order four-wave mixing: application to 3R optical regeneration and NRZ-to-RZ format conversion

The regenerative properties of using a clock-modulated pump for higher-order four-wave mixing in a highly nonlinear fiber are demonstrated through simulations and experimental measurements, at 10 Gb/s, for 3R optical regeneration and NRZ-to-RZ format conversion. The use of a clock-modulated pump for higher-order four-wave mixing enables retiming and enhances the reshaping properties of the signal, thereby improving the regeneration of the signal, relative to a continuous-wave pump.

Implications of signal chirp on the performance of an all-optical 2R regenerator based on self-phase modulation in a highly nonlinear fiber

For a 2R regenerator, based on self-phase modulation and spectral slicing, the sensitivity of the performance to the input signal chirp is investigated by using 10 Gb/s RZ signals with negative, near-zero and positive chirp.