Abstract
In-service transceiver calibration is necessary for hot pluggable modules to achieve optimal component performance, especially for high baud rate and high order modulation systems. Here, two 4 × 2 complex-valued equalizers operating at twice symbol rates are designed before and after carrier phase recovery to compensate Rx and Tx imbalance, respectively. Transceiver gain imbalance, phase imbalance and skew could be derived from the converged two equalizers taps. The proposed scheme is evaluated in a 42 GBaud PDM-16QAM system through 900-km standard single-mode fiber transmission. The experimental results show that the accuracies of gain, phase and skew measurements are greater than 0.1 dB, 0.2 deg. and 0.1 ps for the receiver, 0.2 dB, 0.4 deg. and 0.6 ps for the transmitter.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Diniz, J.C.M., Ros, F.D., Jones, R.T. Zibar, D.: Time skew estimator for dual-polarization QAM transmitters. In: European Conference and Exhibition on Optical Communications (ECOC) (2017), Poster Section I:SC 3
Fatadin, I., Savory, S.J., Ives, D.: Compensation of quadrature imbalance in an optical QPSK coherent receiver. IEEE Photon. Technol. Lett. 20(20), 1733–1735 (2008)
Fludger, C.R.S., Duthel, T., Hermann, P., Kupfer, T.: Low cost transmitter self-calibration of time delay and frequency response for high baud-rate QAM Transceivers. In: Optical Fiber Communication Conference (OFC) (2017), paper Th1D.3
Fludger, C.R.S., Kupfer, T.: Transmitter impairment mitigation and monitoring for high baud-rate, high order modulation systems. In: European Conference and Exhibition on Optical Communications (ECOC) (2016), pp. 256–258
Ju, C., Tao, Z., Fan, Y.Y., Zhao, Y., Chen, H., Su, X.F., Hoshida, T.: Calibration of in-phase/quadrature amplitude and phase response imbalance for coherent receiver. In Optical Fiber Communication Conference (OFC) (2017), paper W2A. 55
OIF-CFP2-ACO-01.0: Optical Internetworking Forum (OIF) (2016)
Rios-Muller, R., Renaudier, J., Charlet, G.: Blind receiver skew compensation and estimation for long-haul non-dispersion managed systems using adaptive equalizer. J. Lightwave Technol. 33(7), 1315–1318 (2015)
Yue, Y., Zhang, B., Wang, Q., Lofland, R., O’Neil, J., Anderson, J.: Detection and alignment of dual polarization optical quadrature amplitude transmitter IQ and XY skews using reconfigurable interference. Opt. Express 24(6), 6719–6734 (2016)
Yue, Y., Wang, Q., Anderson, J.: Transmitter skew tolerance and spectral efficiency tradeoff in high baud-rate QAM optical communication systems. Opt. Express 26(12), 15045–15058 (2018)
Zhang, Q., Yang, Y., Guo, C., Zhou, X., Yao, Y., Lau, A.P.T., Lu, C.: Algorithms for blind separation and estimation of transmitter and receiver IQ imbalances. J. Lightwave Technol. 37(10), 2201–2208 (2019)
Acknowledgement
This study is supported by National Natural Science Foundation of China (No. 61701271) and Open Fund of IPOC (BUPT).
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Liu, N., Ju, C., Li, C. et al. In-service blind transceiver calibration for long-haul non-dispersion managed systems. Opt Quant Electron 52, 37 (2020). https://doi.org/10.1007/s11082-019-2152-x
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s11082-019-2152-x