Title :
Demonstration of record sensitivity in an optically pre-amplified receiver by combining PDM-QPSK and 16-PPM with pilot-assisted digital coherent detection
Author :
Liu, Xiang ; Wood, T.H. ; Tkach, R.W. ; Chandrasekhar, S.
Author_Institution :
Bell Labs., Alcatel-Lucent, Holmdel, NJ, USA
Abstract :
We propose a power-efficient modulation/detection scheme that combines PDM-QPSK and 16-ary-pulse-position-modulation. A record sensitivity of 3.5 photons per bit at BER=10-3 is experimentally demonstrated at 2.5 Gb/s with digital coherent-detection, outperforming PDM-QPSK by >;3 dB.
Keywords :
optical receivers; pulse position modulation; quadrature phase shift keying; 16-pulse position modulation; PDM-QPSK; bit rate 2.5 Gbit/s; optically pre-amplified receiver; pilot assisted digital coherent detection; polarization division multiplexed quadrature phase shift keying; power efficient modulation detection; record sensitivity; Optical attenuators; Optical filters; Optical polarization; Optical receivers; Optical sensors; Sensitivity;
Conference_Titel :
Optical Fiber Communication Conference and Exposition (OFC/NFOEC), 2011 and the National Fiber Optic Engineers Conference
Conference_Location :
Los Angeles, CA
Print_ISBN :
978-1-4577-0213-6
