TY - JOUR
T1 - Multidimensional Optimization of Radio-over-Fiber Links Based on Tunable Carrier-to-Sideband Ratio
AU - Zhai, Weile
AU - Ye, Jinyuan
AU - Wang, Ruihao
AU - Yang, Zhong’ao
AU - Tan, Jiajun
AU - Pang, Xiaoyan
AU - Cui, Wanzhao
AU - Gao, Yongsheng
N1 - Publisher Copyright:
© 2026 by the authors.
PY - 2026/6
Y1 - 2026/6
N2 - In radio-over-fiber (RoF) links, optical single-sideband (OSSB) modulation is an effective method to mitigate power fading caused by chromatic dispersion. However, its low modulation efficiency leads to suboptimal link performance. To address this, we propose a tunable optical carrier-to-sideband ratio (OCSR) OSSB modulation scheme based on a dual-electrode Mach–Zehnder modulator (DEMZM) in a Sagnac loop. Firstly, by adjusting the OCSR, higher radio-frequency (RF) transmission efficiency can be achieved. The experimental results demonstrate that the proposed link provides a 6 dB improvement in received RF power compared to conventional SSB modulation schemes. Furthermore, this approach effectively optimizes nonlinear distortions in the link, achieving a 12.14 dB enhancement in spurious-free dynamic range (SFDR). For tests conducted with a broadband signal featuring a 15 GHz carrier frequency and 500 MHz bandwidth, the optimal error vector magnitude (EVM) reaches 4.88%. Additionally, the link performance can be flexibly improved by adjusting the polarization controller configurations for each channel, making it suitable for multi-user application scenarios.
AB - In radio-over-fiber (RoF) links, optical single-sideband (OSSB) modulation is an effective method to mitigate power fading caused by chromatic dispersion. However, its low modulation efficiency leads to suboptimal link performance. To address this, we propose a tunable optical carrier-to-sideband ratio (OCSR) OSSB modulation scheme based on a dual-electrode Mach–Zehnder modulator (DEMZM) in a Sagnac loop. Firstly, by adjusting the OCSR, higher radio-frequency (RF) transmission efficiency can be achieved. The experimental results demonstrate that the proposed link provides a 6 dB improvement in received RF power compared to conventional SSB modulation schemes. Furthermore, this approach effectively optimizes nonlinear distortions in the link, achieving a 12.14 dB enhancement in spurious-free dynamic range (SFDR). For tests conducted with a broadband signal featuring a 15 GHz carrier frequency and 500 MHz bandwidth, the optimal error vector magnitude (EVM) reaches 4.88%. Additionally, the link performance can be flexibly improved by adjusting the polarization controller configurations for each channel, making it suitable for multi-user application scenarios.
KW - linearization
KW - link gain
KW - optical single sideband (OSSB)
KW - radio over fiber
KW - tunable carrier-to-sideband ratio
UR - https://www.scopus.com/pages/publications/105042710297
U2 - 10.3390/photonics13060600
DO - 10.3390/photonics13060600
M3 - 文章
AN - SCOPUS:105042710297
SN - 2304-6732
VL - 13
JO - Photonics
JF - Photonics
IS - 6
M1 - 600
ER -