Coherent homodyne detection of BPSK signals using time-gated amplification and LiNbO3 optical 90° hybrid

被引：7

作者：

Cho, PS ^{[1
]}

Harston, G ^{[1
]}

Kerr, CJ ^{[1
]}

Greenblatt, AS ^{[1
]}

Kaplan, A ^{[1
]}

Achiam, Y ^{[1
]}

Shpantzer, I ^{[1
]}

机构：

[1] CeLight Inc, Silver Spring, MD 20904 USA

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2004年 / 16卷 / 07期

关键词：

coherent communications; phase modulation;

D O I：

10.1109/LPT.2004.828462

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We have investigated and compared the performance of coherent detection of 12.5-Gb/s nonreturn-to-zero and return-to-zero binary phase-shift keying (BPSK) signals using LiNbO3 optical 90degrees hybrid with pulsed and continuous-wave local laser oscillator (LO). Our results showed that pulsed local oscillator provides at least 2-dB reduction in optical signal-to-noise ratio requirement. Increased eye opening and reduced bit-error ratio of the detected BPSK signal was observed using pulsed local oscillator. Pulsed local oscillator also provides pulse-shaping capability that reduces signal pulse-broadening penalty. Our simulation results agreed well with experiment and predicted that for a given signal and receiver bandwidth there is an optimal LO pulsewidth which gives maximum eye opening.

引用

页码：1727 / 1729

页数：3

共 6 条

[1] Investigation of 2-b/s/Hz 40-Gb/s DWDM transmission over 4x100 km SMF-28 fiber using RZ-DQPSK and polarization multiplexing [J].