Performance of four-stage cascaded fiber optical parametric amplifier (FOPA) using optisystem

An optical fiber plays a significant role to cater the increasing transmission capacity. In optical fiber, there is a few nonlinear effects. One of the nonlinear effects is four-wave mixing (FWM). In-depth analysis of FWM is conducted and it is found that one of the applications in the FWM is a fiber optical parametric amplifier (FOPA). An FOPA has an ability to achieve a high gain and bandwidth. One of the approaches is a cascaded FOPA. A cascaded FOPA is a FOPA with two or more active media, commonly known as a highly nonlinear fiber (HNLF). Previous experimental work shows that the improvement in gain and bandwidth of the cascaded FOPA depends on the passive or active devices inserted in between the HNLF. However, the results at each stage of the cascaded FOPA are not discussed. The result at each stage is crucial to ensure that the cascaded FOPA is amplifying power at the respective stage which is the essence of this work. The cascaded FOPA is demonstrated by using an OptiSystem software with four stages of HNLF with different parameters. Two research work related to the cascaded FOPA are presented in this thesis. The first work focusses on the effects of pump dithering to the cascaded FOPA, while the second work discusses the effects of passive components to cascaded FOPA. The passive components selected are isolator and optical bandpass filter (OBPF). The results show that the FOPA with pump dithering can achieved the gain up to 27 dB, while without pump dithering, only 9 dB gain is achieved. For the performance of the cascaded FOPA with isolators, a high gain of 30 dB is obtained, while the cascaded FOPA with OBPFs, a wider bandwidth of 36 nm is obtained. In conclusion, the pump dithering and isolator can be used to achieved a high gain of FOPA and OBPF can be used to obtain a wider bandwidth of FOPA

Effect of Pump Dithering at Each Stage of Cascaded Fiber Optical Parametric Amplifier

Cascaded fiber optical parametric amplifier (FOPA) can enhance gain and bandwidth. The gain and bandwidth can be further enhanced by dithering the FOPA pump. However, to our knowledge, the effects of a pump dithering at every stage of cascaded FOPA have not been discussed. The study of performance at every stage of cascaded FOPA is quite interesting and beneficial in designing the system. Here, we analyzed, using OptiSystem software, each stage of a cascaded FOPA, when there was a pump dithering and not. The results showed that the pump dithering enhanced the gain and broaden the bandwidth at every stage. The gain and bandwidth obtained with the pump dithering were 27 dB and 20 nm, respectively. On the other hand, when there was no pump dithering, the gain and bandwidth were 9 dB and 12 nm, respectively

High Non-Linear Fiber Length Verification in Optical Regeneration using Non-Return Zero and Return Zero Signal

In this paper, the effect of high nonlinear fiber length in optical regeneration are investigated. To address the goal of this paper, there are two part need to fulfilled which are input pulse part and regeneration part. This work is focus on simulation by using OptiSystem Software. The simulated results show that the effective length for NRZ signal are starting from 0.5km to 2km while for RZ signal are 0.5km to 1km that suitable for optical regeneration. The comparisons of Max Q-factor and Min. log of BER for different signals are recorded

Investigation on Fiber Optical Parametric Amplifier (FOPA) Bandwidth using Optisystem

This study discusses about single-pump Fiber Optical Parametric Amplifier (FOPA) bandwidth based on Fourwave Mixing (FWM). The wider bandwidth of the gain spectrum of FOPA is one of promising feature nowadays. We has simulates the FOPA in the Optisystem software and analyze the effects of dispersion, dispersion slope and effective area to the bandwidth. The bandwidth is varies as we varies the value of parameter mention before and the widest bandwidth recorded by is 100 nm