In-service blind transceiver calibration for long-haul non-dispersion managed systems

被引：2

作者：

Liu, Na ^{[1
]}

Ju, Cheng ^{[1
]}

Li, Changhong ^{[1
]}

Chi, Zongtao ^{[1
]}

Zhang, Zhiguo ^{[2
]}

Chen, Xue ^{[2
]}

机构：

[1] Qingdao Univ, Coll Elect Informat, Qingdao 266071, Peoples R China

[2] Beijing Univ Posts & Telecommun, State Key Lab Informat Photon & Opt Commun, Beijing 100876, Peoples R China

来源：

OPTICAL AND QUANTUM ELECTRONICS | 2019年 / 52卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Transceiver in-phase; quadrature imbalance; In-service blind calibration; Coherent optical systems;

D O I：

10.1007/s11082-019-2152-x

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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 x 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.

引用

页数：6