تجزیه و تحلیل عملکرد از یک مبدل طول موج تمام نوری مبتنی بر XPM در تقویت کننده های نوری نیمه هادی
|کد مقاله||سال انتشار||مقاله انگلیسی||ترجمه فارسی||تعداد کلمات|
|27757||2003||5 صفحه PDF||سفارش دهید||2810 کلمه|
Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)
Journal : Optics & Laser Technology, Volume 35, Issue 4, June 2003, Pages 261–265
Performance analysis is carried out for an all-optical wavelength converter based on cross-phase modulation in two semiconductor optical amplifiers (SOAs) arranged in a Mach–Zehnder interferometer configuration to evaluate the efficiency of conversion and the signal-to-crosstalk ratio (SCR) at the output of the converter. The results evaluated analytically for input non-return to zero signal at a bit rate of show that conversion is possible over a wavelength separation of between the pump and the input wavelengths. It is further noticed that SCR of the order of or more can be achieved at a bit rate of , optical amplifier bandwidth of 10 times bit rate and driving current of when the input pump is 60% of saturation intensity. The range of wavelength conversion can further be increased by increasing the driving current.
All-optical wavelength converters are the key components for multi-wavelength optical transport networks and are expected to provide wavelength conversion in optical domain without significant distortion of the input signal . Wavelength converters offer the advantages of increased flexibility in wavelength routing and avoidance of wavelength blocking in a wavelength division multiplexing (WDM) network node. As a consequence, the capacity of an optical multi-wavelength network can be considerably increased with the use of wavelength converters at different nodes . Wavelength converters based on SOAs and semiconductor lasers have been the focus of considerable research interests during the last few years  and . A variety of all-optical wavelength converters have been reported such as; semiconductor optical amplifier converters based on cross-phase modulation (XPM)  and , cross-gain modulation (XGM)  and , and four-wave mixing (FWM) , ,  and , bistable lasers using saturable absorbers, injection locked Y-lasers and distributed feedback (DFB) lasers relying on optical frequency or intensity modulation. Previous studies have been carried out experimentally ,  and  and by simulation to evaluate the efficiency of wavelength conversion and the noise characteristics of wavelength converters with some experimental results on the bit error rate performance of an optical link using wavelength converters. In this paper, performance analysis is carried out for an all-optical wavelength converter based on XPM in two semiconductor optical amplifiers arranged in the two arms of a Mach–Zehnder interferometer (MZI) . The analysis is carried out to determine the efficiency of wavelength conversion and the amount of crosstalk introduced during wavelength conversion with optical filtering taking into account the effect of optical amplifiers’ spontaneous emission (ASE) and the signal to crosstalk ratio (SCR) at the output of the converter is derived.
نتیجه گیری انگلیسی
An analytical approach is presented to determine the performance of a wavelength converter based on semiconductor optical amplifiers arranged in the two arms of an MZI. The results show that conversion is possible with a significant output SNR and SCR of more than under normal operating conditions. The analysis can be easily extended to include the effects of dispersion in fiber on the converter performance.