DocumentCode :
743044
Title :
140-Gb/s 20-km Transmission of PAM-4 Signal at 1.3 
for Short Reach Communications
Author :
Kangping Zhong ; Xian Zhou ; Yuliang Gao ; Wei Chen ; Jiangwei Man ; Li Zeng ; Lau, Alan Pak Tao ; Chao Lu
Author_Institution :
Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., Hong Kong, China
Volume :
27
Issue :
16
fYear :
2015
Firstpage :
1757
Lastpage :
1760
Abstract :
We experimentally demonstrated 140-Gb/s transmission over 20-km standard single-mode fiber employing pulse-amplitude modulation (PAM)-4 and direct detection (DD) at 1.3 μm. DD faster than Nyquist is employed to compensate for channel impairments. The optimal length of taps of decision directed least mean square and the optimal tap coefficient for digital postfilter are investigated. A receiver sensitivity of -5.5 dBm at bit error rate of 3.8× 10-3 is realized for 140-Gb/s PAM-4 signal after 20-km transmission. To the best of our knowledge, this is the highest reported baud rate (70 GBd) of direct detected PAM-4 signal and the highest per channel bit rate with single polarization and DD for short reach communications.
Keywords :
digital filters; error statistics; least mean squares methods; optical fibre communication; optical fibre filters; optical fibre polarisation; optical receivers; pulse amplitude modulation; telecommunication channels; PAM-4 signal; bit error rate; bit rate 140 Gbit/s; channel impairments; decision directed least mean square; digital postfilter; direct detection; distance 20 km; optimal tap coefficient; pulse-amplitude modulation; receiver sensitivity; short reach communications; single polarization; standard single-mode fiber; wavelength 1.3 mum; Bit error rate; Optical attenuators; Optical fibers; Optical filters; Optical receivers; Optical sensors; Pulse-amplitude modulation; direct detection; optical modulation;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/LPT.2015.2439571
Filename :
7115060
Link To Document :
