TY - JOUR
T1 - Microwave Photonic Link with Improved Dynamic Range for Long-Haul Multi-Octave Applications
AU - Zheng, Ruiqi
AU - Chan, Erwin Hoi Wing
AU - Wang, Xudong
AU - Feng, Xinhuan
AU - Guan, Bai Ou
AU - Yao, Jianping
N1 - Publisher Copyright:
IEEE
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/12
Y1 - 2021/12
N2 - A technique to suppress both the second and third order nonlinear distortions in a long-haul microwave photonic link (MPL) is presented. The MPL consists of a dual-polarization dual-parallel Mach-Zehnder modulator (DP-DPMZM), a polarizer, a length of fiber, an optical bandpass filter (OBPF), and a balanced photodetector (BPD). The DP-DPMZM has two sub-DPMZMs. For a two-tone signal at f1 and f2, the second order harmonic distortions (SHD) and the second order intermodulation distortions (IMD2) at f2+f1 are suppressed by biasing one sub-DPMZM to operate with single-sideband suppressed carrier (SSB-SC) modulation. The IMD2 at f2-f1 is suppressed by balanced detection at the BPD. The third order intermodulation distortions (IMD3) are suppressed by adjusting the states of polarization of the light wave into the polarizer. The spurious free dynamic range (SFDR) in a multi-octave band is free from fiber dispersion effect due to the bias setting of the DP-DPMZM. As a result, a high multi-octave SFDR can be obtained irrespective of the transmission distance. The proposed MPL is analyzed theoretically and is verified experimentally. The measured multi-octave SFDR is 95.9 dBHz1/2 and 92.1 dBHz1/2 when a long fiber link at 10 km and 20 km is used for signal transmission, respectively, which is 16.1 dB and 17.3 dB higher compared to a conventional Mach-Zehnder modulator (MZM) based MPL operating under the same condition.
AB - A technique to suppress both the second and third order nonlinear distortions in a long-haul microwave photonic link (MPL) is presented. The MPL consists of a dual-polarization dual-parallel Mach-Zehnder modulator (DP-DPMZM), a polarizer, a length of fiber, an optical bandpass filter (OBPF), and a balanced photodetector (BPD). The DP-DPMZM has two sub-DPMZMs. For a two-tone signal at f1 and f2, the second order harmonic distortions (SHD) and the second order intermodulation distortions (IMD2) at f2+f1 are suppressed by biasing one sub-DPMZM to operate with single-sideband suppressed carrier (SSB-SC) modulation. The IMD2 at f2-f1 is suppressed by balanced detection at the BPD. The third order intermodulation distortions (IMD3) are suppressed by adjusting the states of polarization of the light wave into the polarizer. The spurious free dynamic range (SFDR) in a multi-octave band is free from fiber dispersion effect due to the bias setting of the DP-DPMZM. As a result, a high multi-octave SFDR can be obtained irrespective of the transmission distance. The proposed MPL is analyzed theoretically and is verified experimentally. The measured multi-octave SFDR is 95.9 dBHz1/2 and 92.1 dBHz1/2 when a long fiber link at 10 km and 20 km is used for signal transmission, respectively, which is 16.1 dB and 17.3 dB higher compared to a conventional Mach-Zehnder modulator (MZM) based MPL operating under the same condition.
KW - Microwave photonic links
KW - multi-octave band
KW - Multiprotocol label switching
KW - Optical fiber communication
KW - Optical fiber dispersion
KW - Optical fiber polarization
KW - Optical filters
KW - Optical polarization
KW - Radio frequency
KW - radio over fiber
KW - spurious free dynamic range
UR - http://www.scopus.com/inward/record.url?scp=85107214587&partnerID=8YFLogxK
U2 - 10.1109/JLT.2021.3082154
DO - 10.1109/JLT.2021.3082154
M3 - Article
AN - SCOPUS:85107214587
SN - 0733-8724
VL - 39
SP - 7915
EP - 7924
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
IS - 24
ER -