All-optical coherent pulse compression for dynamic laser ranging using an acousto-optic dual comb - Archive ouverte HAL
Article Dans Une Revue Optics Express Année : 2021

All-optical coherent pulse compression for dynamic laser ranging using an acousto-optic dual comb

Résumé

We demonstrate a new and simple dynamic laser ranging platform based on analog all-optical coherent pulse compression of modulated optical waveforms. The technique employs a bidirectional acousto-optic frequency shifting loop, which provides a dual-comb photonic signal with an optical bandwidth in the microwave range. This architecture simply involves a CW laser, standard telecom components and low frequency electronics, both for the dual-comb generation and for the detection. As a laser ranging system, it offers a range resolution of a few millimeters, set by a dual-comb spectral bandwidth of 24 GHz, and a precision of 20 µm for an integration time of 20 ms. The system is also shown to provide dynamic measurements at scanning rates in the acoustic range, including phase-sensitive measurements and Doppler shift velocimetry. In addition, we show that the application of perfect correlation phase sequences to the transmitted waveforms allows the ambiguity range to be extended by a factor of 10 up to ∼20 m. The system generates quasi-continuous waveforms with low peak power, which makes it possible to envision long-range telemetry or reflectometry requiring highly amplified signals.
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Dates et versions

hal-03441638 , version 1 (22-11-2021)

Identifiants

Citer

Vincent Billault, Vicente Durán, Carlos R Fernández-Pousa, Vincent Crozatier, Daniel Dolfi, et al.. All-optical coherent pulse compression for dynamic laser ranging using an acousto-optic dual comb. Optics Express, 2021, 29, ⟨10.1364/oe.430998⟩. ⟨hal-03441638⟩

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