Optimisation of amplitude limiters for phase preservation based on the exact solution to degenerate four-wave mixing.

Adopting an exact solution to four-wave mixing (FWM), wherein harmonic evolution is described by the sum of two Bessel functions, we identify two causes of amplitude to phase noise conversion which impair FWM saturation based amplitude regenerators: self-phase modulation (SPM) and Bessel-order mixing (BOM). By increasing the pump to signal power ratio, we may arbitrarily reduce their impact, realising a phase preserving amplitude regenerator. We demonstrate the technique by applying it to the regeneration of a 10 GBaud QPSK signal, achieving a high level of amplitude squeezing with minimal amplitude to phase noise conversion.

[1]  M. Matsumoto,et al.  Performance improvement of DPSK signal transmission by a phase-preserving amplitude limiter. , 2007, Optics express.

[2]  A. Friesem,et al.  Exact solution of four-wave mixing of copropagating light beams in a Kerr medium , 1987 .

[3]  M. Matsumoto.  Phase-noise generation in an amplitude limiter using saturation of a fiber-optic parametric amplifier , 2008, 2008 34th European Conference on Optical Communication.

[4]  K. R. H. Bottrill,et al.  On the role of signal-pump ratio in FWM-based phase preserving amplitude regeneration , 2015, 2015 17th International Conference on Transparent Optical Networks (ICTON).

[5]  G. Leuchs,et al.  NOLM-based RZ-DPSK signal regeneration , 2005, IEEE Photonics Technology Letters.

[6]  T. Okoshi,et al.  Suppression of stimulated Brillouin scattering using optical isolators , 1992 .

[7]  T. Kamio,et al.  Nonlinear Phase Noise Reduction of DQPSK Signals by a Phase-Preserving Amplitude Limiter Using Four-Wave Mixing in Fiber , 2008, IEEE Journal of Selected Topics in Quantum Electronics.

[8]  S. Yoo.  Wavelength conversion technologies for WDM network applications , 1996 .

[9]  K. R. H. Bottrill,et al.  Investigation into the role of pump to signal power ratio in FWM-based phase preserving amplitude regeneration , 2015, 2015 Conference on Lasers and Electro-Optics (CLEO).

[10]  P. Andrekson,et al.  Fiber-optical parametric amplifier with 70-dB gain , 2006, IEEE Photonics Technology Letters.

[11]  L G Kazovsky,et al.  92% pump depletion in a continuous-wave one-pump fiber optical parametric amplifier. , 2001, Optics letters.

[12]  Masayuki Matsumoto.  Phase noise generation in an amplitude limiter using saturation of a fiber-optic parametric amplifier. , 2008 .

[13]  L. Gruner-Nielsen,et al.  Fiber Optic Parametric Amplifier With 10-dB Net Gain Without Pump Dithering , 2013, IEEE Photonics Technology Letters.

[14]  Li Zi-yao,et al.  Fiber-based Optical Parametric Amplifiers and Their Applications , 2004 .

[15]  M. Fejer,et al.  Optical phase conjugation in phase-modulated transmission systems: experimental comparison of different nonlinearity-compensation methods. , 2010, Optics express.

[16]  K. Rottwitt,et al.  Parametric amplification and phase preserving amplitude regeneration of a 640 Gbit/s RZ-DPSK signal. , 2013, Optics express.

[17]  Yu Yu,et al.  Optimized Quantum–Well Semiconductor Optical Amplifier for RZ-DPSK Signal Regeneration , 2011, IEEE Journal of Quantum Electronics.