Novel orthogonal modulation format DRZ-FSK/DPSK for high-speed long-haul optical communication

• 作 者: 张俊文 邵宇丰 方武良 黄博 陶理 朱江波 迟楠
• 机 构: State Key Lab of ASIC & System, Department of Communication Science and Engineering, Fudan Universit
• 出 处: Chinese Optics Letters
• 发表日期: 2010年09期
• 关键词: DPSK format keying amplifier subsequent rotation return modulated converted demo

We propose a novel advanced orthogonal modulation format dark return-to-zero frequency shift keying/differential phase shift keying (DRZ-FSK/DPSK) and its realization scheme. The DRZ-FSK/DPSK is generated by the combination of a 40-Gb/s return-to-zero (RZ) signal and a DRZ signal which is converted from the RZ using a semiconductor optical amplifier (SOA) based on nonlinear cross polarization rotation (XPR) and then re-modulated by high-bit-rate DPSK at 40 Gb/s. The feasibility of the scheme is exper-imentally demonstrated. Bit error rate (BER) results of the total 80-Gb/s DRZ-FSK/DPSK orthogonal modulation signal with a subsequent 100-km single-mode fiber (SMF) transmission link show its potential for future high-speed long-haul optical communication.

The proposed DRZ-FSK / DPSK is generated by the combination of a 40-Gb (DRZ-FSK / DPSK) and its realization scheme / s return-to-zero (RZ) signal and a DRZ signal which is converted from the RZ using a semiconductor optical amplifier (SOA) based on nonlinear cross polarization rotation (XPR) and then re-modulated by high-bit-rate DPSK at 40 Gb / s. The feasibility of the scheme is exper- imentally demonstrated. Bit error rate (BER) results of the total 80-Gb / s DRZ- FSK / DPSK orthogonal modulation signal with subsequent 100-km single- mode fiber (SMF) transmission link show its potential for future high-speed long-haul optical communication.