Optical phase conjugation in backward Raman amplification

Signal power asymmetry optimisation for optical phase conjugation using Raman amplification.

We numerically optimise in-span signal power asymmetry in different advanced Raman amplification schemes, achieving a 3% asymmetry over 62 km SMF using random DFB Raman laser amplifier. We then evaluate the impact of such asymmetry on the performance of systems using mid-link OPC by simulating transmission of 7 × 15 Gbaud 16QAM Nyquist-spaced WDM-PDM signals.

Periodic amplification and conjugation of optical solitons.

Nondegenerate optical parametric amplifiers can be used to simultaneously phase conjugate and amplify a pulse in a nonlinear optical fiber. The gain in the amplifiers compensates the linear loss in the fiber, while the phase conjugation effectively neutralizes second-order dispersion, self-phase modulation, the Raman self-frequency shift, and Gordon-Haus jitter. If the remaining third-order and...

Backward Raman Amplification in the Long-wavelength Infrared

The wealth of work in backward Raman amplification in plasma has focused on the extreme intensity limit, but backward Raman amplification may also provide an effective and practical mechanism for generating intense, broad bandwidth, long-wavelength infrared radiation. An electromagnetic finite-difference time-domain simulation coupled with a relativistic cold fluid plasma model is used to demon...

DWDM Link with Multiple Backward Pumped Raman Amplification

uncompensated link with backward-pumped distributed Raman amplification

We present experimental and numerical investigations of Kerr nonlinearity compensation in a 400-km standard single-mode fiber link with distributed Raman amplification with backward pumping. A dual-pump polarization-independent fiber-based optical parametric amplifier is used for mid-link spectral inversion of 5 × 28-GBd polarization-multiplexed 16QAM signals. Signal quality factor (Q-factor) i...