TY - GEN
T1 - Compensation of Third-Order Inter Modulation Distortion by Using Frequency Chirp Modulation for Electro-Optic Modulator
AU - Kashiwagi, Yuta
AU - Takase, Kosuke
AU - Kawai, Tadashi
AU - Enokihara, Akira
AU - Yamamoto, Naokatsu
AU - Kawanishi, Tetsuya
N1 - Funding Information:
The authors thank Dr. Atsushi Kanno and Shinya Nakajima of National Institute of Information and Communications Technology for their valuable cooperation in this work. This work was partly supported by JSPS KAKENHI (17K06392).
Publisher Copyright:
© 2018 The Institute of Electronics, Information and Communication Engineers (IEICE).
PY - 2018/12/31
Y1 - 2018/12/31
N2 - A new electro-optic modulator for compensating the nonlinear distortion is proposed. The third-order intermodulation distortion (IMD3) induced in the receiver output are optically suppressed by using two Mach-Zehnder modulators (MZMs) connected in parallel and operating with chirp-parameters of the opposite signs to each other. The performance of the IMD3 compensation was estimated by the numerical calculations. We made an experiment to confirm the IMD3 compensation operation by using 10 GHz two-tone microwave signals and a 1.55 μm light source. The modulator was constituted by a dual-parallel Mach-Zehnder modulator (DPMZM). The chirp parameters of MZMs of the DPMZM were set to +0.5 and -0.5, respectively. It was observed by the measurement that the IMD3 components in the receiver output were suppressed by more than 20 dB compared to those for the conventional single-MZM operation in a range of modulation index below 0.25π rad. These experimental results agree well with the numerical calculation ones.
AB - A new electro-optic modulator for compensating the nonlinear distortion is proposed. The third-order intermodulation distortion (IMD3) induced in the receiver output are optically suppressed by using two Mach-Zehnder modulators (MZMs) connected in parallel and operating with chirp-parameters of the opposite signs to each other. The performance of the IMD3 compensation was estimated by the numerical calculations. We made an experiment to confirm the IMD3 compensation operation by using 10 GHz two-tone microwave signals and a 1.55 μm light source. The modulator was constituted by a dual-parallel Mach-Zehnder modulator (DPMZM). The chirp parameters of MZMs of the DPMZM were set to +0.5 and -0.5, respectively. It was observed by the measurement that the IMD3 components in the receiver output were suppressed by more than 20 dB compared to those for the conventional single-MZM operation in a range of modulation index below 0.25π rad. These experimental results agree well with the numerical calculation ones.
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U2 - 10.23919/PIERS.2018.8597804
DO - 10.23919/PIERS.2018.8597804
M3 - Conference contribution
AN - SCOPUS:85060933709
T3 - Progress in Electromagnetics Research Symposium
SP - 2011
EP - 2017
BT - 2018 Progress In Electromagnetics Research Symposium, PIERS-Toyama 2018 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 Progress In Electromagnetics Research Symposium, PIERS-Toyama 2018
Y2 - 1 August 2018 through 4 August 2018
ER -