SRS VE FWM OLAYLARININ DWDM-GPON SİSTEMLERİN AŞAĞI YÖNLÜ KANAL PERFORMANSLARI ÜZERİNDEKİ BİRLEŞİK ETKİSİ

Yıl 2018, Cilt: 23 Sayı: 2, 67 - 86, 31.08.2018

Faisal Ibrahim Mohamed Ibrahım Sait Eser Karlık

https://doi.org/10.17482/uumfd.390531

Cited By: 1

Öz

Bu makalede, 7-, 15- ve 31-kanallı yoğun
dalgaboyu bölmeli çoğullamalı gigabit pasif optik ağ (DWDM-GPON) sistemlerinin
merkez aşağı yönlü kanalları üzerinde gerçekleştirilen işaret-çapraz karışım
oranı (SXR) benzetimleri yardımıyla, uyarılmış Raman saçılması (SRS) ve dört
dalga karışımının (FWM), DWDM-GPON aşağı yönlü kanal performansları üzerindeki
birleşik etkisi, FWM’nin tekli etkisi ile karşılaştırılmıştır. Benzetim
sonuçları, SRS’nin FWM’nin negatif etkilerini kompanze ettiğini ve kompanzasyon
belirginliğinin artan kanal sayıları ve kanallar arası boşluk değerleri ile
arttığını göstermektedir. 50 GHz ve 100 GHz gibi yüksek kanallar arası boşluk
değerlerinde, SXR değişimi,        0.5
km’lik çok kısa kanal uzunluğu değişimlerinde güçlü bir osilasyon davranışı
sergilemektedir. Bu kanallar arası boşluk değerlerinde, SRS ve FWM birleşik
etkisi, SXR değişimindeki maksimum osilasyon genliğini FWM’nin tekli etkisine
göre daha da arttırmaktadır. 0.1-5 mW aralığında, Raman kazancının kanal giriş
güçleri ile yaklaşık olarak doğrusal değişim sergilediği gözlenmiştir ve Raman
kazancı artan fiber uzunlukları, kanallar arası boşluk değerleri ve kanal
sayıları ile artmaktadır. Bu çalışmanın sonuçları, DWDM-GPON sistemler
üzerindeki SRS ve FWM birleşik etkisi ile FWM tekli etkisi arasındaki belirgin farkı vurgulamakta ve mevcut DWDM-GPON uygulamaları için önemli
ipuçları vermektedir.

Anahtar Kelimeler

Yoğun dalgaboyu bölmeli çoğullama, Gigabit pasif optik ağ, Dört dalga karışımı, Uyarılmış Raman saçılması, Kuvvetlendirme faktörü, Optik fiber

The Combined Impact of SRS And FWM Phenomena on the Downlink Channel Performance of DWDM-GPON Systems

Öz

In this paper the combined impact of stimulated Raman scattering (SRS)
and four-wave mixing (FWM) on the downlink channel performance of dense wavelength division multiplexed-gigabit
passive optical networks (DWDM-GPONs) has been compared with the single impact
of FWM via signal-to-crosstalk ratio (SXR) simulations performed on center
downlink channels of 7-, 15- and 31-channel DWDM-GPON systems. Simulation
results show that SRS compensates negative impacts of FWM and
compensation significance enhances with increasing channel numbers and channel
spacing values. At high channel
spacing values of 50 GHz and 100 GHz, variation of SXR can display a strong oscillatory behavior in very short channel
length variations of 0.5 km. The combined impact of SRS and FWM enhances the
maximum oscillation amplitude of SXR variation with respect to the single
impact of FWM at those channel spacing values. It has been observed that Raman
gain exhibits an approximately linear variation with channel input powers in
0.1-5 mW range and it increases with increasing fiber lengths, channel spacing
values and channel numbers. Results of this research emphasize the significant
difference between the combined impact of SRS and FWM and the single impact of
FWM on DWDM-GPON systems and give important hints for current DWDM-GPON
implementations.

Anahtar Kelimeler

Dense wavelength division multiplexing, Gigabit passive optical network, Four wave mixing, Stimulated Raman scattering, Amplification factor, Optical fiber

Kaynakça

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