Chinese Optics Letters, 2010, 8 (10): 976, Published Online: Oct. 19, 2010
40-Gb/s PolMux-QPSK transmission using low-voltage modulation and single-ended digital coherent detection Download: 981次
偏振复用QPSK 单端检测 40Gb/s 光纤环路 060.0060 Fiber optics and optical communications 060.1660 Coherent communications 060.5060 Phase modulation
Abstract
We demonstrate a novel 40-Gb/s transmission system over a 10×101-km standard single mode fiber (SSMF) loop. This system features polarization multiplexed quadrature phase shift keying (PolMux-QPSK), lowvoltage modulation of 2-V peak-to-peak signal amplitude, and home-made 90? optical hybrid with singleended digital coherent detection. Any power amplifers before the modulator and balanced detectors are not used. In the case of low-voltage modulation, coherent detection is much less sensitive to modulator bias offset than delay interferometer-based demodulation.
Yong Feng, He Wen, Hanyi Zhang, Xiaoping Zheng. 40-Gb/s PolMux-QPSK transmission using low-voltage modulation and single-ended digital coherent detection[J]. Chinese Optics Letters, 2010, 8(10): 976.