Compensation of quadrature imbalance in an optical coherent OQPSK receiver in presence of frequency offset

Xinying LI; Bo HUANG; Yufeng SHAO; Junwen ZHANG; Shumin ZOU; Wuliang FANG; Li TAO; Jiangbo ZHU; Chi NAN

doi:10.1007/s12200-011-0140-2

Frontiers of Optoelectronics, Volume. 4, Issue 3, 288(2011)

Compensation of quadrature imbalance in an optical coherent OQPSK receiver in presence of frequency offset

Xinying LI, Bo HUANG, Yufeng SHAO, Junwen ZHANG, Shumin ZOU, Wuliang FANG, Li TAO, Jiangbo ZHU, and Chi NAN^*

Department of Communication Science and Engineering, State Key Laboratory of Application Specific Integrated Circuit (ASIC) and System, Fudan University, Shanghai 200433, China

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In this paper, we describe the impact of quadrature imbalance (QI) in the presence of frequency offset in an optical coherent offset quadrature phase shift keying (OQPSK) receiver. Arbitrary conjugate misalignment was realized in a 24 90° optical hybrid, and the ellipse correction (EC) method of quadrature imbalance was applied in our simulation. In the case of transmission, the EC method can significantly improve the system performance.

Keywords

ellipse fitting frequency offset offset quadrature phase shift keying (OQPSK)quadrature imbalance (QI)

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Xinying LI, Bo HUANG, Yufeng SHAO, Junwen ZHANG, Shumin ZOU, Wuliang FANG, Li TAO, Jiangbo ZHU, Chi NAN. Compensation of quadrature imbalance in an optical coherent OQPSK receiver in presence of frequency offset[J]. Frontiers of Optoelectronics, 2011, 4(3): 288

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Paper Information

Received: Mar. 11, 2011

Accepted: Apr. 26, 2011

Published Online: Sep. 21, 2012

The Author Email: NAN Chi (nanchi@fudan.edu.cn)

DOI:10.1007/s12200-011-0140-2

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology