Optical phase-locked loop for coherent transmission over 500km using heterodyne detection with fiber lasers

IEICE Electronics Express

Jumpei Hongo¹  Keisuke Kasai¹  Masataka Nakazawa¹  Masato Yoshida¹ 

[1] Research Institute of Electrical Communication, Tohoku University

关键词: optical phase-locked loop;    coherent transmission;    fiber laser;    frequency stabilization;   

DOI  :  10.1587/elex.4.77

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(8)Cited-By(9)We have developed an optical phase-locked loop (OPLL) that can operate over 500km. The coherent transmitter is a 1.54µm 13C2H2 frequency-stabilized CW fiber ring laser with a frequency stability of 2.0 × 10-11 and a linewidth of 4kHz. To obtain wide band operation with a bandwidth of 1GHz, we fabricated a high-speed fiber laser as a local oscillator. By using these fiber lasers, the OPLL circuit successfully generated an intermediate frequency signal with a phase error variance of 7.9 × 10-3 rad.

【 授权许可】

Unknown