Chinese Optics Letters, Volume. 8, Issue 10, 976(2010)
40-Gb/s PolMux-QPSK transmission using low-voltage modulation and single-ended digital coherent detection
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.
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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
Received: Mar. 29, 2010
Accepted: --
Published Online: Oct. 19, 2010
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