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北京錦坤科技有限公司

www.jonkon.com.cn 

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摘 要：本文采用激光器、光調(diào)制器、可編程光纖延時陣列及光探測器等構(gòu)成了新型的微波光纖延遲線系統(tǒng)，對系統(tǒng)的發(fā)射、傳輸和接收三個組成模塊進行了理論分析，建立了各模塊及系統(tǒng)的數(shù)學模型，對系統(tǒng)的傳輸特性和時延特性進行了仿真。結(jié)果表明，此類微波光纖延遲線可視為線性系統(tǒng)。并采用矢量網(wǎng)絡(luò)分析儀對系統(tǒng)進行了實測，幅頻特性和相頻特性在合理頻帶范圍內(nèi)均接近于理想情況，群時延測量結(jié)果與理論計算一致，延時精度達到10 ps以內(nèi)。

關(guān)鍵詞：微波光纖延遲線；相時延；群時延；矢量網(wǎng)絡(luò)分析儀

中圖分類號：TN253 TN929.1  文獻標識碼：A  國家標準學科分類代碼：510.5020

Analysis and measurement of delay property for programmable
microwave fiber delay line

Zhang Chunxi, Zhang Xiaoqing, Hu Shuling, Chen Yinan, Hu Hanwei

（School of Instrument Science and Optoelectronics Engineering,Beihang University, Beijing 100191, China）

Abstract：This paper presents a novel microwave fiber delay line system made up of a laser diode, an optical modulator, a programmable fiber delay array based on optical switches and a photoelectric detector. The emitting module, transfer module and receiving module are analyzed theoretically; the models of individual modules and the system are built. Simulation results of transmission property and delay property show that the system is linear. Measured by a vector network analyzer, the amplitude-frequency characteristics and phase-frequency characteristics of the system are both close to ideal condition in a reasonable frequency range. The measurement results of group delay accord with theoretical calculation compley. The time delay precision of the microwave fiber delay line is within 10 ps.

Key words：microwave fiber delay line; phase delay; group delay; vector network analyzer

北京錦坤科技有限公司

www.jonkon.com.cn