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- W2002128122 abstract "This paper discusses direct frequency modulation of semiconductor lasers with a linear current ramp and its use in optical sensors. The laser diodes evaluated were the Sharp LT015, Mitsubishi 2901, the Hitachi HL8314 and HLP1400. The maximum attainable freuency deviations ranged between 20 to 50 GHz. Chirp rates ranged from 10 to 10 Hz/sec for modulation amplitudes from 5 to 15 mA and modulation frequencies from 500 Hz to 200 kHz. The upper limit for efficient direct frequency modulation was at 50 KHz. Coherence lengths from less than 1 meter to greater than 5 meters were measured from the devices. Measurements of power level, frequency deviation, and noise predict measurement of distances up to 13 meters with 0.01 cm accuracy, using conventional channel substrate planar AlGaAs lasers." @default.
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- W2002128122 date "1989-02-09" @default.
- W2002128122 modified "2023-09-23" @default.
- W2002128122 title "Direct Frequency Modulation In Interferometric Systems" @default.
- W2002128122 doi "https://doi.org/10.1117/12.959822" @default.
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