Application of optical frequency comb generation with controlled delay circuit for managing the high capacity network system
Autor: | Xin Xiangjun, Feng Tian, Ibrar Ahmad, Rahat Ullah, Mao Yaya, Amjad Ali, Muhammad Saad Khan, Liu Bo |
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Rok vydání: | 2018 |
Předmět: |
Optical amplifier
Computer science Bandwidth (signal processing) 02 engineering and technology 01 natural sciences 010309 optics 020210 optoelectronics & photonics 0103 physical sciences Telecommunications link 0202 electrical engineering electronic engineering information engineering Electronic engineering Optical line termination Radio frequency Electrical and Electronic Engineering Phase shift module Phase-shift keying Data transmission |
Zdroj: | AEU - International Journal of Electronics and Communications. 94:322-331 |
ISSN: | 1434-8411 |
Popis: | The generation of optical frequency comb (OFC) with novel controlled delay circuit is presented in this study. The proposed OFC is based on a single laser source which is cascadingly connected with three modulators; all the modulators are tailored by RF signal while incorporating no phase shifter or electrical/optical amplifier. The proposed OFC is used as a source at optical line terminal (OLT) of WDM-PON setup, which serves multiple users with a single laser source making OLT side very cost effective. 41 comb lines with over 40 dB tone to noise ratio and high side mode suppression ratio, least amplitude difference of under 0.3 dB, with cost effective setup is an attractive source for WDM-PON system. The frequency spacing is 32 GHz between OFCG lines which provides enough bandwidth for data transmission, the overall bandwidth provided by this scheme is 1.2 THz. Using DPSK modulation technique across each frequency of OFCG, the controlled delay circuit increases the capacity by factor two, whereas by deploying DQPSK modulation technique, it quadrupled the overall capacity in downlink transmission. Thus, the system offers four times increased capacity ∼1.6 Tbps by deploying state of the art technique for modulation and generating OFC with controlled delay. The average power penalty in the downlink and uplink transmission is 2.5 dBm and 3.13 dBm. |
Databáze: | OpenAIRE |
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