Four Wave Mixing in Distributed Feedback Semiconductor Lasers for Coherent optical Communication

1995 ◽  
Vol 24 (1) ◽  
pp. 33-38
Author(s):  
M. Mukunda Rao
Keyword(s):  
Semiconductor Lasers ◽  
Optical Communication ◽  
Four Wave Mixing ◽  
Distributed Feedback ◽  
Wave Mixing ◽  
Coherent Optical Communication

Numerical modelling of relative intensity noise (RIN) transfer as a result of four-wave mixing in optical communication links

2019 ◽  
pp. 4-13
Author(s):  
Тимофей Михайлович Федотенко ◽  
Анастасия Евгеньевна Беднякова
Keyword(s):  
Optical Communication ◽  
Relative Intensity ◽  
Signal Propagation ◽  
Four Wave Mixing ◽  
Relative Intensity Noise ◽  
Communication Link ◽  
Wave Mixing ◽  
Intensity Noise ◽  
Signal Degradation ◽  
Communication Links

Выполнено исследование распространения сигнала в волоконной линии связи с сонаправленной накачкой. Несмотря на невозможность переноса шумов из накачки в сигнал в результате вынужденного комбинационного рассеяния (ВКР), в натурном эксперименте наблюдается деградация сигнала уже при небольших длинах распространения (порядка 5-10 км). Для исследования причин деградации сигнала построена численная модель на основе обобщенного нелинейного уравнения Шрёдингера, учитывающая дисперсию высших порядков, керровскую нелинейность и запаздывающий рамановский отклик среды. Также используется более реалистичная модель многомодового источника накачки. В результате проведенного численного анализа продемонстрировано, что в определенных условиях не только ВКР, но и четырехволновое смешение может инициировать в линиях связи процесс переноса шумов из накачки в сигнал. It is well known that any real transmission link introduces distortions into the signal that can be either recoverable or not fully removable. The sources of such unremovable distortions leading to the loss of information are double Rayleigh scattering, amplified spontaneous emission, RIN (Relative Intensity Noise) transfer and nonlinear interactions such as four-wave mixing. In this paper we perform numerical investigation of signal propagation and RIN transfer in optical communication link with co-propagating pump. Despite the impossibility of intensity noise transfer from pump to signal due to stimulated Raman scattering (SRS), in the experiment signal degradation is observed even at small propagation lengths of 5-10 km. To find the origin of signal degradation, a numerical model is proposed based on the generalized nonlinear Schr¨odinger equation. The model takes into account the higher-order dispersion, Kerr nonlinearity, and the delayed Raman response of the medium. A more realistic model of the multimode pumping source is also employed. It is worth noting, that the most common analytical and numerical models, describing RIN transfer from pump to signal, are based on balance equations and neglects influence of dispersive and nonlinear effects. As a result of the numerical analysis, it was demonstrated that not only SRS but also four-wave mixing can initiate the process of noise transfer from pump to signal in the communication links.

Four-wave mixing and direct terahertz emission with two-color semiconductor lasers

2004 ◽  
Vol 84 (18) ◽  
pp. 3585-3587 ◽  
Author(s):  
S. Hoffmann ◽  
M. Hofmann ◽  
E. Bründermann ◽  
M. Havenith ◽  
M. Matus ◽  
...  
Keyword(s):  
Semiconductor Lasers ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Terahertz Emission

scholarly journals Phase noise of four‐wave mixing in semiconductor lasers

1992 ◽  
Vol 60 (20) ◽  
pp. 2454-2456 ◽  
Author(s):  
Rongqing Hui ◽  
Antonio Mecozzi
Keyword(s):  
Phase Noise ◽  
Semiconductor Lasers ◽  
Four Wave Mixing ◽  
Wave Mixing

Effect of OPC on Fiber Nonlinearities for Dense Soliton Optical Communication Medium

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Ghanendra Kumar ◽  
Chakresh Kumar
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Communication ◽  
Review Paper ◽  
Four Wave Mixing ◽  
Destructive Interference ◽  
Wave Mixing ◽  
Dense Wavelength Division Multiplexing ◽  
Communication Medium ◽  
Fiber Nonlinearities ◽  
Wavelength Division

AbstractThis review paper scrutinizes the staging of dense wavelength division multiplexing soliton system in return to zero and non-return to zero format. In-line optical phase conjugator (OPC) is used to depreciate the power of four wave mixing (FWM). Destructive interference between both the halves of in-line OPC plummets the FWM power sturdily. This paper concludes with the indication that return-to-zero with OPC gives out better performance with FWM suppression.

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