Calculation of bit error ratio for optically pre-amplified DPSK receivers using optical Mach-Zehnder interferometer demodulation and balanced detection

Xiupu Zhang; Zhenqian Qu; Lei Wang

doi:10.1117/12.707686

8 September 2006 Calculation of bit error ratio for optically pre-amplified DPSK receivers using optical Mach-Zehnder interferometer demodulation and balanced detection

Xiupu Zhang, Zhenqian Qu, Lei Wang

Author Affiliations +

Proceedings Volume 6343, Photonics North 2006; 63430O (2006) https://doi.org/10.1117/12.707686
Event: Photonics North 2006, 2006, Quebec City, Canada

Abstract

This paper presents an analysis of how to calculate bit error ratio (BER) with physical explanation for optically pre-amplified DPSK receivers using optical Mach-Zehnder interferometer (MZI) demodulation and balanced detection. It is shown that BER calculation method for this kind of receivers is different from the conventional calculation method used widely for IM/DD receivers. An analytical relationship in receiver sensitivity between DPSK receivers using MZI demodulation with balanced detection and IM/DD receivers (or DPSK receivers using MZI demodulation and single-port detection) is given based on the Gaussian noise approximation. Our calculation method correctly predicts the 3-dB improvement of receiver sensitivity by using balanced detection over single-port detection or IM/DD receivers. This predicted 3-dB improvement by using balanced detection converges with the interpretation of the 3-dB improvement by signal constellation. Furthermore, quantum-limited DPSK receivers with MZI demodulation are also analyzed in Appendix B.

Citation Download Citation

Xiupu Zhang, Zhenqian Qu, and Lei Wang "Calculation of bit error ratio for optically pre-amplified DPSK receivers using optical Mach-Zehnder interferometer demodulation and balanced detection", Proc. SPIE 6343, Photonics North 2006, 63430O (8 September 2006); https://doi.org/10.1117/12.707686

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