论文信息 - Guideline of choosing optical delay time to optimize the performance of an interferometry-based in-band OSNR monitor.

Guideline of choosing optical delay time to optimize the performance of an interferometry-based in-band OSNR monitor.

We propose and experimentally demonstrate a guideline of choosing optical delay time in an interferometry-based optical signal-to-noise ratio (OSNR) monitor to achieve the optimal monitoring performance by calculating the normalized autocorrelation function of the channel noise. According to the position of the first zero point of the calculated autocorrelation function, the delay time is determined; consequently the OSNR monitoring range up to 29 dB (within an error≤±0.5 dB) is achieved for 112 Gb/s PM-QPSK signal with a channel filter bandwidth of 100 GHz. The experimental results also show that the guideline is applicable to channel filters with different bandwidths and shapes. In simulation, the guideline is proven to be valid in OSNR monitoring for a 28 Gbaud PM-16QAM signal and a 50 Gbaud PM-QPSK signal.

[1] Marc Sorel,et al. High-Sensitivity In-Band OSNR Monitoring System Integrated on a Silicon Photonics Chip , 2013, IEEE Photonics Technology Letters.

[2] A. L. Bradley,et al. In-band OSNR monitoring using a pair of Michelson fiber interferometers. , 2010, Optics express.

[3] Changyuan Yu,et al. Optical signal to noise ratio monitoring using single channel sampling technique. , 2014, Optics express.

[4] Changyuan Yu,et al. Optical performance monitoring for the next generation optical communication networks , 2010 .

[5] Deming Kong,et al. Multi-wavelength in-band OSNR monitoring based on Lyot-Sagnac interferometer , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[6] Zhenning Tao,et al. Monitoring of OSNR by using a Mach–Zehnder interferometer , 2001 .

[7] J.H. Lee,et al. A Review of the Polarization-Nulling Technique for Monitoring Optical-Signal-to-Noise Ratio in Dynamic WDM Networks , 2006, Journal of Lightwave Technology.

[8] Vijay Vusirikala,et al. Demonstration of in-service wavelength division multiplexing optical-signal-to-noise ratio performance monitoring and operating guidelines for coherent data channels with different modulation formats and various baud rates. , 2014, Optics letters.