TY - GEN
T1 - Investigation of homodyne demodulation of RZ-BPSK signal based on an optical Costas loop
AU - Zhou, Haijun
AU - Zhu, Zunzhen
AU - Xie, Weilin
N1 - Publisher Copyright:
© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
PY - 2018
Y1 - 2018
N2 - We demonstrate the coherent detection of 10 Gb/s return-To-zero (RZ) binary phase-shift keying (BPSK) signal based on a homodyne Costas optical phase-locked loop (OPLL). It demonstrates time misalignment tolerance of 10% of the transmitted RZ-BPSK signal, i.e.-20 to ps between the pulse carver and the phase modulator for 5 Gb/s RZ-BPSK signal,-10 to ps or 10 Gb/s RZ-BPSK signal. Besides, the Costas coherent receiver shows a 2.5 dB sensitivity improvement over conventional 5 Gb/s NRZ-BPSK and a 1.4 dB over 10 Gb/s NRZ-BPSK only at the cost of slightly higher residual phase error. Those merits of sufficient tolerance to misalignment, higher receiver sensitivity, and low residual phase error of RZ-BPSK modulation are beneficial to be applied in free space optical (FSO) communication to achieve higher link budget, longer transmission distance.
AB - We demonstrate the coherent detection of 10 Gb/s return-To-zero (RZ) binary phase-shift keying (BPSK) signal based on a homodyne Costas optical phase-locked loop (OPLL). It demonstrates time misalignment tolerance of 10% of the transmitted RZ-BPSK signal, i.e.-20 to ps between the pulse carver and the phase modulator for 5 Gb/s RZ-BPSK signal,-10 to ps or 10 Gb/s RZ-BPSK signal. Besides, the Costas coherent receiver shows a 2.5 dB sensitivity improvement over conventional 5 Gb/s NRZ-BPSK and a 1.4 dB over 10 Gb/s NRZ-BPSK only at the cost of slightly higher residual phase error. Those merits of sufficient tolerance to misalignment, higher receiver sensitivity, and low residual phase error of RZ-BPSK modulation are beneficial to be applied in free space optical (FSO) communication to achieve higher link budget, longer transmission distance.
KW - Binary phase-shift keying (BPSK)
KW - Costas loop
KW - Free space optical communication
KW - Homodyne coherent detection
KW - NRZ and RZ modulation
KW - Optical coherent communication
KW - Optical phase-locked loop (OPLL)
UR - http://www.scopus.com/inward/record.url?scp=85041114108&partnerID=8YFLogxK
U2 - 10.1117/12.2295534
DO - 10.1117/12.2295534
M3 - Conference contribution
AN - SCOPUS:85041114108
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - 2017 International Conference on Optical Instruments and Technology
A2 - Bretenaker, Fabien
A2 - Chen, Jian
A2 - Dong, Yi
PB - SPIE
T2 - 2017 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Optical Signal Processing
Y2 - 28 October 2017 through 30 October 2017
ER -