Proposal of dual-heterodyne-mixing method and application to high-speed waveform measurement using low-speed equipments |
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Authors: | Tatsutoshi Shioda Toshiaki Yamazaki |
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Affiliation: | Department of Electrical Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan |
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Abstract: | A novel method to measure a relative phase between frequency-different optical wavelengths has been proposed and named as Dual-heterodyne-mixing method. The operation principle of the method is represented, where the relative phase is simply described as dc voltage. The operation principle was experimentally confirmed with 0- and π-phase-different optical pairs generated by an intensity modulator. Also, it has been applied for a high-speed signal sensing with a high-resolution amplitude spectrum measurement method. A 12.5 Gbps signal sensing with 1/63 relatively low-speed photodetector (200 MHz) was demonstrated. |
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Keywords: | Dual-heterodyne-mixing method Heterodyne detection Waveform detection |
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