| 摘要 |
The present invention relating to a device and method for multiplication of repetition frequency in optical pulse trains. The device and the method multiply repetition frequency of optical pulse train generated with ML-FRL with high stability. The device comprises an optical fiber ring composed of optical fibers, an optical amplifier and a modulator for optically modulating, and an electric signal generator generating high frequency signals. The device generates an optical pulse train of repeating frequency of f<SUB>m</SUB>, when applying electric signals of frequency of f<SUB>m </SUB>to the modulator. In addition to the construction, the stabilized optical pulse generator comprises a filter passing through frequencies of integer multiple of the applied modulation frequency f<SUB>m</SUB>, and a composite cavity composed of a plurality of optical fibers of which lengths are different each other. As frequency f<SUB>c1 </SUB>of the ring fiber of the long cavity of the composite cavity and a resonant frequency f<SUB>c2 </SUB>of the ring fiber of the short cavity of the composite cavity, a lowest common multiple frequency f'<SUB>composite </SUB>of f<SUB>c1 </SUB>and f<SUB>c2</SUB>, which is integer multiple of Kxf<SUB>m</SUB>, the stabilised optical pulse generator makes the repetition frequencies of the generated optical pulses of PxKxf<SUB>m </SUB>(K, P: integer).
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