Open AccessCondition for Gaussian Schell-model beam to maintain the state of polarization on the propagation in free space
Author(s) -
Xinhui Zhao,
Yong Yao,
Yunxu Sun,
Chao Liu
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.017888
Subject(s) - physics , optics , polarization (electrochemistry) , free space , transmitter , coherence (philosophical gambling strategy) , gsm , free space optical communication , bit error rate , gaussian , optical communication , telecommunications , computer science , quantum mechanics , channel (broadcasting) , chemistry
In the free space optical communication system with circle polarization shift keying (CPolSK) modulation, the changes of polarization state of light beam have significant influence on the system performance. Keeping the state of polarization (SOP) unchanged on propagation can reduce the bit error rate. Based on the unified theory of coherence and polarization, we derive the sufficient condition for Gaussian Schell-model (GSM) beam to keep the SOP unchanged. We found that when the three spectral correlation widths (delta(xx), delta(yy) and delta(xy)) equal to each other and sigma(x) = sigma(y), the GSM beam maintains the SOP on propagation. This conclusion can be helpful for the design of the transmitter in the CPolSK system.