Premium
Simple adaptive first‐order PMD compensator using a Faraday rotator and a variable DGD element
Author(s) -
Pan Shilong,
Wang Jiajun,
Lou Caiyun,
Yang Yanfu,
Dai Wuju
Publication year - 2008
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.23669
Subject(s) - differential group delay , polarization mode dispersion , control theory (sociology) , polarization controller , faraday effect , computer science , electronic engineering , engineering , optical fiber , physics , optics , control (management) , fiber laser , artificial intelligence , quantum mechanics , magnetic field
A two‐degree‐of‐freedom (DOF) polarization mode dispersion (PMD) compensator has been developed to cancel the effects of first‐order PMD. The compensator comprises of a Faraday rotator (FR) and a dynamically varying crystal differential‐group‐delay (DGD) element. Because of the reduced number of control parameters, the compensator potentially possesses the desirable features of simple control, fast response, and cost saving. Principle of operation is validated by theoretical analysis and successful automatic PMD compensation is achieved in a 40 Gbit/s nonreturn‐to‐zero (NRZ) system. The compensator increased the average DGD allowed from less than 23% per bit‐slot for the uncompensated case to 42% at an outage probability of 10 −4 . Fast response of the compensator is also observed. The optimum setting of the compensator can be found in about 10 nregulating steps for all PMD emulator (PMDE) setting. These features allow the effective mitigation of the first‐order PMD effects within an optical fiber channel. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2417–2420, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23669