TY - JOUR
T1 - Optically preamplified receiver performance due to VSB filtering for 40-Gb/s optical signals modulated with various formats
AU - Lee, Jaehoon
AU - Kim, Seongha
AU - Kim, Yonghoon
AU - Oh, Yunje
AU - Hwang, Seongtaek
AU - Jeong, Jichai
N1 - Funding Information:
Manuscript received August 7, 2002; revised November 13, 2002. This work was supported in part by the NRL Program and the BK21 Program in Korea. J. Lee, S. Kim, Y. Kim, and J. Jeong are with the Department of Radio Engineering, Korea University, Seoul 136-701, Korea. Y. Oh and S. Hwang are with the Optical Network Research and Development Group, Samsung Electronics, Gyeonggi-do 442-742, Korea. Digital Object Identifier 10.1109/JLT.2003.808777
PY - 2003/2
Y1 - 2003/2
N2 - Optically preamplified receiver performance according to the vestigial sideband (VSB) filtering has been numerically investigated for 40-Gb/s optical signals modulated with nonreturn-to-zero, duobinary nonreturn-to-zero (NRZ), return-to-zero (RZ), carrier-suppressed RZ, and duobinary carrier-suppressed RZ formats. The VSB filtering enables the spectral widths of NRZ, duobinary NRZ, and RZ signals to be reduced without severe power penalties at the receiver. On the other hand, carrier-suppressed RZ and duobinary carrier-suppressed RZ signals have no large advantages over VSB filtering because of the characteristics of their signals. Our results suggest that RZ signals are the most suitable modulation format for VSB filtering, without considering the filter loss, because of the tolerance of the intersymbol interference and a large spectral width. However, duobinary NRZ signals are the most suitable modulation format for VSB filtering, considering the filter loss, because of their narrow spectral width.
AB - Optically preamplified receiver performance according to the vestigial sideband (VSB) filtering has been numerically investigated for 40-Gb/s optical signals modulated with nonreturn-to-zero, duobinary nonreturn-to-zero (NRZ), return-to-zero (RZ), carrier-suppressed RZ, and duobinary carrier-suppressed RZ formats. The VSB filtering enables the spectral widths of NRZ, duobinary NRZ, and RZ signals to be reduced without severe power penalties at the receiver. On the other hand, carrier-suppressed RZ and duobinary carrier-suppressed RZ signals have no large advantages over VSB filtering because of the characteristics of their signals. Our results suggest that RZ signals are the most suitable modulation format for VSB filtering, without considering the filter loss, because of the tolerance of the intersymbol interference and a large spectral width. However, duobinary NRZ signals are the most suitable modulation format for VSB filtering, considering the filter loss, because of their narrow spectral width.
KW - Modulation
KW - Numerical analysis
KW - Optical filters
KW - Optical-fiber communication
KW - Sensitivity
UR - http://www.scopus.com/inward/record.url?scp=0037904557&partnerID=8YFLogxK
U2 - 10.1109/JLT.2003.808777
DO - 10.1109/JLT.2003.808777
M3 - Article
AN - SCOPUS:0037904557
SN - 0733-8724
VL - 21
SP - 521
EP - 527
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 2
ER -