Instantaneous frequency measurement using two parallel I/Q modulators based on optical power monitoring

doi:10.1088/1674-1056/ac1923

中国物理B ›› 2022, Vol. 31 ›› Issue (1): 10702-010702.doi: 10.1088/1674-1056/ac1923

Instantaneous frequency measurement using two parallel I/Q modulators based on optical power monitoring

Chuangye Wang(王创业)¹, Tigang Ning(宁提纲)¹, Jing Li(李晶)^1,†, Li Pei(裴丽)¹, Jingjing Zheng(郑晶晶)¹, and Jingchuan Zhang(张景川)²

1 Key Laboratory of All Optical Network and Advanced Telecommunication Network of EMC, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China;
2 Beijing Institute of Spacecraft Environment Engineering, Beijing 100029, China

收稿日期:2021-04-30 修回日期:2021-07-12 接受日期:2021-07-30 出版日期:2021-12-03 发布日期:2021-12-14
通讯作者: Jing Li E-mail:lijing@bjtu.edu.cn
基金资助:
Project supported by the National Key Research and Development Program of China (Grant No. 2018YFB1801003), the National Natural Science Foundation of China (Grant Nos. 61525501 and 61827817), and the Beijing Natural Science Foundation, China (Grant No. 4192022).

Instantaneous frequency measurement using two parallel I/Q modulators based on optical power monitoring

Chuangye Wang(王创业)¹, Tigang Ning(宁提纲)¹, Jing Li(李晶)^1,†, Li Pei(裴丽)¹, Jingjing Zheng(郑晶晶)¹, and Jingchuan Zhang(张景川)²

1 Key Laboratory of All Optical Network and Advanced Telecommunication Network of EMC, Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044, China;
2 Beijing Institute of Spacecraft Environment Engineering, Beijing 100029, China

Received:2021-04-30 Revised:2021-07-12 Accepted:2021-07-30 Online:2021-12-03 Published:2021-12-14
Contact: Jing Li E-mail:lijing@bjtu.edu.cn
Supported by:
Project supported by the National Key Research and Development Program of China (Grant No. 2018YFB1801003), the National Natural Science Foundation of China (Grant Nos. 61525501 and 61827817), and the Beijing Natural Science Foundation, China (Grant No. 4192022).

摘要/Abstract

摘要： A scheme for instantaneous frequency measurement (IFM) using two parallel I/Q modulators based on optical power monitoring is proposed. The amplitude comparison function (ACF) can be constructed to establish the relationship between the frequency of radio frequency (RF) signal and the power ratio of two optical signals output by two I/Q modulators. The frequency of RF signal can be derived by measuring the optical power of the optical signals output by two I/Q modulators. The measurement range and measurement error can be adjusted by controlling the delay amount of the electrical delay line. The feasibility of the scheme is verified, and the corresponding measurement range and measurement error of the system under different delay amounts of the electrical delay line are given. Compared with previous IFM schemes, the structure of this scheme is simple. Polarization devices, a photodetector and an electrical power meter are not used, which reduces the impact of the environmental disturbance on the system and the cost of the system. In simulation, the measurement range can reach 0 GHz-24.5 GHz by adjusting the delay amount of the electrical delay line τ =20 ps. The measurement error of the scheme is better at low frequency, and the measurement error of low frequency 0 GHz-9.6 GHz can reach -0.1 GHz to +0.05 GHz.

关键词: microwave photonics, instantaneous frequency measurement, optical power monitoring

Abstract: A scheme for instantaneous frequency measurement (IFM) using two parallel I/Q modulators based on optical power monitoring is proposed. The amplitude comparison function (ACF) can be constructed to establish the relationship between the frequency of radio frequency (RF) signal and the power ratio of two optical signals output by two I/Q modulators. The frequency of RF signal can be derived by measuring the optical power of the optical signals output by two I/Q modulators. The measurement range and measurement error can be adjusted by controlling the delay amount of the electrical delay line. The feasibility of the scheme is verified, and the corresponding measurement range and measurement error of the system under different delay amounts of the electrical delay line are given. Compared with previous IFM schemes, the structure of this scheme is simple. Polarization devices, a photodetector and an electrical power meter are not used, which reduces the impact of the environmental disturbance on the system and the cost of the system. In simulation, the measurement range can reach 0 GHz-24.5 GHz by adjusting the delay amount of the electrical delay line τ =20 ps. The measurement error of the scheme is better at low frequency, and the measurement error of low frequency 0 GHz-9.6 GHz can reach -0.1 GHz to +0.05 GHz.

Key words: microwave photonics, instantaneous frequency measurement, optical power monitoring

中图分类号: (Infrared, submillimeter wave, microwave and radiowave instruments and equipment)

07.57.-c

06.30.Ft (Time and frequency) 06.20.Dk (Measurement and error theory)

Chuangye Wang(王创业), Tigang Ning(宁提纲), Jing Li(李晶), Li Pei(裴丽), Jingjing Zheng(郑晶晶), and Jingchuan Zhang(张景川). Instantaneous frequency measurement using two parallel I/Q modulators based on optical power monitoring[J]. 中国物理B, 2022, 31(1): 10702-010702.

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Instantaneous frequency measurement using two parallel I/Q modulators based on optical power monitoring

Instantaneous frequency measurement using two parallel I/Q modulators based on optical power monitoring

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