TY - JOUR
T1 - Improved off-center narrow filter method to monitor in-band optical signal-to-noise ratio
AU - Shen, Shikui
AU - Yang, Aiying
AU - Sun, Yunan
PY - 2009/12
Y1 - 2009/12
N2 - In the long haul optical fiber link, the spectrum of the accumulated amplified spontaneous emission noise is not flat because of filtering effects of the devices along the fiber link. The unflatness of amplified spontaneous emission (ASE) noise and its impacts imposed on the performance of the off-center narrow filter polarization-nulling method when monitoring the in-band optical signal-to-noise ratio (OSNR) of dense wavelength division multiplexing (DWDM) system are analyzed, and a modified method by introducing an unflat factor in the calculation of OSNR is proposed. The simulated results show that the OSNR could be measured accurately with the modified method.
AB - In the long haul optical fiber link, the spectrum of the accumulated amplified spontaneous emission noise is not flat because of filtering effects of the devices along the fiber link. The unflatness of amplified spontaneous emission (ASE) noise and its impacts imposed on the performance of the off-center narrow filter polarization-nulling method when monitoring the in-band optical signal-to-noise ratio (OSNR) of dense wavelength division multiplexing (DWDM) system are analyzed, and a modified method by introducing an unflat factor in the calculation of OSNR is proposed. The simulated results show that the OSNR could be measured accurately with the modified method.
KW - Off-center narrow-filter
KW - Optical communications
KW - Optical performance monitoring (OPM)
KW - Optical signal-to-noise ratio (OSNR)
KW - Polarization nulling
KW - Unflat factor
UR - http://www.scopus.com/inward/record.url?scp=77949552435&partnerID=8YFLogxK
U2 - 10.3788/AOS200929s2.0074
DO - 10.3788/AOS200929s2.0074
M3 - Article
AN - SCOPUS:77949552435
SN - 0253-2239
VL - 29
SP - 74
EP - 78
JO - Guangxue Xuebao/Acta Optica Sinica
JF - Guangxue Xuebao/Acta Optica Sinica
IS - SUPPL. 2
ER -