Comparison of phase modulation formats for 40Gb/s Ultra-long-haul systems

被引：0
|
作者：
Lei, B [1 ]
Zhang, HJ [1 ]
Gu, WY [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Beijing 100876, Peoples R China
来源：
OPTICAL TRANSMISSION, SWITCHING, AND SUBSYSTEMS III, PTS 1 AND 2 | 2005年 / 6021卷
关键词：
optical fiber communication; optical modulation; DPSK;
D O I：
10.1117/12.635657
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
This paper studies advanced optical phase modulation formats in 40Gb/s Ultra-long-haul systems. As well known, the performance of 40Gb/s Ultra-long-haul systems depends upon the modulation formats. Since DPSK modulation format has higher spectral efficiency and more tolerance to fibre nonlinearity induced impairment, different duty cycle has important impact on result. In this letter, we comprehensively analyzed the transmitting performances of optical phase modulation formats with using the eye-opening penalty (EOP). NRZ-DPSK, full frequency modulated RZ-DPSK (FullRZ-DPSK), half frequency modulated RZ-DPSK (HalfRZ-DPSK) and CSRZ-DPSK modulation formats was numerical simulated within four kinds fiber system: G.652 Fiber, True Wave fiber (TW), True Wave-Reduced Slope fiber (TW-RS) and Large Effective Area Fiber (LEAF). Through modelling and simulation, we compute the EOP of these phase modulation formats, with different average optical input power. The numerical simulation result shows that CSRZ-DPSK is best performance in all phase modulation, and G.652 outperforms other types of fibers in 40Gb/s Ultra-long-haul systems.
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页数：8
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