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• W4311997666 endingPage "2013" @default.
• W4311997666 startingPage "2013" @default.
• W4311997666 abstract "We propose the generation of random-modulated pulses using a gain-switched semiconductor laser with a delayed self-homodyne interferometer (DSHI) for lidar applications. By emitting non-repetitive random-modulated pulses, ambiguity in ranging and interference in detection can be mitigated. When gain-switched, the wavelength of the laser fluctuates abruptly at the beginning of the pulse and then drops until it stabilizes toward its continuous-wave (CW) state. By beating the two pulses with instantaneous frequency detuning from the DSHI, pulses consisting of random and down-chirped modulations can be generated without any complex code generation and modulation. In this study, we investigate the waveforms and spectra of the random-modulated pulses generated under various homodyne delay lengths, switching currents, and pulsewidths. We characterize their signal-to-noise ratio (SNR), precision, and cross-correlation between consecutive pulses to evaluate their performance in lidar applications. For a good SNR of over 12 dB, the generated pulses have an optimal precision of approximately 1 mm in ranging, which is substantially better than the chaos-modulated pulses generated based on laser feedback dynamics. By establishing a random-modulated pulse lidar based on the proposed gain-switched homodyne scheme, we successfully demonstrate 3D imaging and profiling with good precision." @default.
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• W4311997666 date "2023-01-06" @default.
• W4311997666 modified "2023-10-18" @default.
• W4311997666 title "Random-modulated pulse lidar using a gain-switched semiconductor laser with a delayed self-homodyne interferometer" @default.
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• W4311997666 doi "https://doi.org/10.1364/oe.479720" @default.
• W4311997666 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36785224" @default.
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