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논문 기본 정보

자료유형
학술저널
저자정보
Jiahong Zhang (Kunming University of Science and Technology) Qian Ji (Kunming University of Science and Technology) Jing Zhang (Kunming University of Science and Technology)
저널정보
한국광학회 Current Optics and Photonics Current Optics and Photonics Vol.9 No.1
발행연도
2025.2
수록면
43 - 54 (12page)

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초록· 키워드

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In this paper, a wideband reconfigurable instantaneous microwave multifrequency measurement sys- tem based on an optical frequency shifter and optical frequency comb has been proposed, designed and investigated. In the scheme, an optical frequency shift is employed to shift the optical carrier of the in- put dual-parallel Mach-Zehnder modulator (DPMZM) and align it with the first comb line of the optical frequency comb. Simultaneously, the central frequencies of the two demultiplexers are designed so that the output of 90° optical hybrid coupler contains only one local oscillator optical carrier. Furthermore, the local oscillator optical carrier is positioned at the initial location of the channel. The issue of fre- quency ambiguity caused by the beating frequencies generated between the unknown signal and a pair of different power local oscillator carriers is resolved by combining a 90° OHC and a pair of balanced photodetectors (BPD). Simulation results reveal that when the channel bandwidth is set to 2 GHz, the system frequency measurement range is 0.01–50 GHz, with an error of less than ±5 MHz. By adjusting the channel bandwidth to 4 GHz, the system measurement range is 0.01–100 GHz, with a frequency measurement error of 5–14.6 MHz. This approach offers advantages such as a wide measurement range, reconfigurability, and low error.

목차

Ⅰ. INTRODUCTION
Ⅱ. THEORETICAL ANALYSIS
Ⅲ. SIMULATION
Ⅳ. CONCLUSION
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