Degree of polarization technique used in PMD compensation of optical microwave transmission systems

• Published in: Optics communications Vol. 236; no. 1; pp. 109 - 114
• Main Authors: Liu, Hankui, Zhang, Xianmin, Chen, Kangsheng
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.06.2004; Elsevier Science
• Subjects: Applied sciences; Circuit properties; Degree of polarization technique; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Fiber optics; Fundamental areas of phenomenology (including applications); Integrated optics. Optical fibers and wave guides; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Microwave communication; Optical and optoelectronic circuits; Optical communication systems, multiplexers, and demultiplexers; Optical fiber communication; Optical single-sideband modulation; Optics; Physics; PMD compensation; Polarization-mode dispersion; Radiowave and microwave (including millimeter wave) technology; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Wave optics; Degree of polarization technique; 42.25.p; 84.40.Ua; Microwave communication; Polarization-mode dispersion; Optical fiber communication; Optical single-sideband modulation; PMD compensation; 42.81.−i; Optical fibers; Optical signal; Optical polarization; Microwave transmitter; Theoretical study; Optical communication; Modelling; Optical dispersion compensation; Polarization mode dispersion; Group delay
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/j.optcom.2004.03.023

Polarization-mode dispersion (PMD) can severely degrade the performance of optical microwave transmission systems by inducing a periodic power fading of the received RF signal that depends on the subcarrier frequency and accumulated differential group delay (DGD) along fiber. We derive a compact analytical expression of the degree of polarization (DOP) of optical signal using Jones and Stokes representations based on first-order assumption. Using this expression, we quantify the signal DOP fading induced by PMD by means of numerical simulations for BPSK and ASK modulations. The dependences of signal DOP on subcarrier frequency, accumulated DGD, and modulation formats have been demonstrated. It is found that signal DOP has similar periodic fading with the power of received RF signal, which is caused by DGD. Moreover, if the DOP technique is used in the PMD compensation of the optical microwave transmission systems, the DOP degradation is more sensitive to the DGD in the system modulated by BPSK than by ASK. The performance of this technique is immune to residual chromatic dispersion of the fiber.