Compensation fibre chromatic dispersion by optical phase conjugation in a semiconductor laser amplifier

1993 ◽  
Vol 29 (21) ◽  
pp. 1851 ◽  
Author(s):  
M.C. Tatham ◽  
G. Sherlock ◽  
L.D. Westbrook
Keyword(s):  
Semiconductor Laser ◽  
Phase Conjugation ◽  
Chromatic Dispersion ◽  
Optical Phase Conjugation ◽  
Laser Amplifier ◽  
Optical Phase ◽  
Semiconductor Laser Amplifier

scholarly journals Impact of Frequency Shift on Nonlinear Compensation Using Optical Phase Conjugation for M-QAM Signals

2019 ◽  
Author(s):  
Binh Nguyen ◽  
Hung Tan Nguyen ◽  
Dien Van Nguyen ◽  
Tuan Van Nguyen ◽  
Quang The Nguyen
Keyword(s):  
Frequency Shift ◽  
High Speed ◽  
Second Harmonic ◽  
Phase Conjugation ◽  
Chromatic Dispersion ◽  
Optical Phase Conjugation ◽  
Actual System ◽  
Optical Phase ◽  
Nonlinear Compensation ◽  
The Impact

Nonlinear compensation using optical phase conjugation (OPC) have been considered a promising technique to increase the reach of high-speed fiber-optic transmission systems. OPC-based nonlinear compensation employs an optical phase conjugation located at a middle of the fiber link to generate a complexed conjugated signal with respect the signal in the first half of the link for propagation in the second half. OPC technique assumes a symmetry for signal propagating in the first and second half to obtain a perfect nonlinear and chromatic dispersion. However, as most of practical OPC schemes are realized by nonlinear effects such as four-wave mixing or a combination of second-harmonic generation and difference frequency generation, the frequency shift induced by OPC affects the signal symmetrical requirement for nonlinear compensation because the chromatic dispersion is different for the first and second half transmissions. In this paper, we investigate the impact of frequency shift on the nonlinear compensation using OPC for high symbol rate, high level modulation format signals. This will be important to understand the tolerance of the OPC techniques against such a practical condition for actual system implementations.

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