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- W2058520100 abstract "Laser output power and frequency are modulated when the optical beam is back-scattered into the active cavity. By signal processing, the Doppler frequency can be acquired, and the target's velocity can be calculated. Based on these properties, an interferometry velocity sensor can be designed. In order to know whether the self-mixing laser diode velocimeter is suitable for high speed (km/s) scene, the self-mixing laser diode velocimeter's maximum measurable velocity (MMV) is analyzed. Based on the three-mirror cavity model, relations of the laser output power's frequency fluctuations and Doppler frequency are acquired. External optical feedback is regarded as laser's small-signal modulation by the Doppler frequency. From rate equations of the carrier density and the photon density, following conclusions is acquired: self-mixing laser diode velocimeter's MMV is restricted by laser's relaxation resonant frequency in principle; self-mixing laser diode velocimeter's MMV goes up to kilometers per second theoretically. The result is available to use the self-mixing technique to develop high performance, small overall dimensions and low cast instruments to measure high speed." @default.
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- W2058520100 date "2009-07-03" @default.
- W2058520100 modified "2023-09-24" @default.
- W2058520100 title "Theoretic analysis on the maximum measurable velocity of a self-mixing laser diode velocimeter" @default.
- W2058520100 doi "https://doi.org/10.1117/12.832329" @default.
- W2058520100 hasPublicationYear "2009" @default.
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