Study on 8DPSK of multi-phase modulation technology based on CSRZ

• 作 者: 张霞 许恒迎 牛慧娟 张民 王芳 白成林 张晓光
• 机 构: School of Physics Science and Information Engineering, Liaocheng University,Key Laboratory of Optica
• 出 处: Optoelectronics Letters
• 发表日期: 2011年02期
• 关键词: DPSK satisfactory modem format return keying formulae suppressed demodulation DQ

A new modulation format in optical fiber communication system, the eight differential phase shift keying (8DPSK) of multi-phase modulation technology based on carrier-suppressed return-to-zero (CSRZ) is proposed in this paper. The formulae of CSRZ-8DPSK modem methods are derived theoretically and the methods are demonstrated. Spectra based on CSRZ and CSRZ-8DPSK modulation methods and their eye diagrams by simulation with MATLAB are obtained. The results show that the CSRZ-8DPSK modulation methods have narrower spectra with higher efficiency. The performance of eye diagrams is also much satisfactory after demodulation, suggesting some possible applications of the methods in the next generation of optical fiber communications.

A new modulation format in optical fiber communication system, the eight differential phase shift keying (8DPSK) of multi-phase modulation technology based on carrier-suppressed return-to-zero (CSRZ) is proposed in this paper. The formula of CSRZ-8DPSK modem methods on derived theoretically and the methods are demonstrated. The results show that the CSRZ-8DPSK modulation methods have narrower spectra with higher efficiency. The performance of eye diagrams is also much later satisfactory after demodulation, suggesting some possible applications of the methods in the next generation of optical fiber communications.