Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6011
Title: Signed frequency offset measurement for direct detection DPSK system with a chromatic dispersion offset
Authors: Zhao, J
Lau, APT 
Qureshi, KK
Lu, C 
Ma, XR
Tam, HY 
Wai, PKA 
Keywords: Fiber optics communications
Modulation
Phase modulation
Issue Date: 8-Nov-2010
Publisher: Optical Society of America
Source: Optics express, 8 Nov. 2010, v. 18, no. 23, p. 23829-23836 How to cite?
Journal: Optics express 
Abstract: We demonstrated a method for the measurement of signed frequency offset between optical source and delay interferometer (DI) for 10Gb/s DPSK signals based on asynchronous delay-tap sampling technique with a chromatic dispersion (CD) offset. The demodulated DPSK signals show asymmetrical property and amplitude shoulder appears on the waveforms with frequency offset and a fixed CD offset together. The delay-tap sampling scatter plots also show the asymmetry related to the asymmetrical signal distortion. Our proposed method cannot only realize the measurement of the magnitude of frequency offset but also the polarity. The measurement range is from −2GHz to + 2GHz and the sensitivity can reach ± 100MHz. The simulation and experimental results are demonstrated and in good agreement.
URI: http://hdl.handle.net/10397/6011
EISSN: 1094-4087
DOI: 10.1364/OE.18.023829
Rights: © 2010 OSA
This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OE.18.023829. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.
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