| Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2021: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
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| Outline of Final Research Achievements |
This study proposed the frequency-domain optical correlation (FDOC) technology as a new optical waveform measurement method. By using the FDOC, the spectrum of the signal under test is scanned in the frequency domain and the correlation value with the source signal is obtained. The optical waveform is obtained by applying inverse Fourier transformation to the acquired correlation spectrum. Since the signal is processed in the frequency domain, it will not be limited by the cutoff frequency of electronic devices such as photoelectric converters, and it becomes possible to measure arbitrary optical waveform at ultrahigh speed. In this project, an SSB optical modulator as an optical frequency shifter was installed in an optical loop circuit for continuous spectral scanning of signals. It was constructed to enable frequency scanning in the 100 GHz range, and both simulations and experiments were conducted to investigate and confirm the principle.
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