Demonstration of a spatial–spectral holographic LIDAR range-Doppler processor
| Autor: | Kelvin H. Wagner, Friso Schlottau, Youzhi Li |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Physics
Signal processing business.industry Biophysics Holography Physics::Optics Ranging General Chemistry Condensed Matter Physics Laser Biochemistry Signal Atomic and Molecular Physics and Optics law.invention Interferometry symbols.namesake Optics Lidar law symbols Physics::Atomic Physics business Doppler effect |
| Zdroj: | Journal of Luminescence. 127:135-145 |
| ISSN: | 0022-2313 |
| DOI: | 10.1016/j.jlumin.2007.02.048 |
| Popis: | We present a new approach to laser interferometric Doppler and ranging (LIDAR) processing using spatial–spectral holography (SSH). In this approach, broadband optical signals from a random noise or frequency-modulated laser are transmitted and reflected off remote targets. The return signals interfere spatially and spectrally with a local copy of the original transmit signal in an SSH medium, resulting in spectral gratings that have a spectral period inversely proportional to the LIDAR target's range and a position proportional to the target's Doppler (or velocity). These gratings are subsequently read out by a slowly chirped source onto a parallel detector array, and the velocity and range of the targets are inferred. We present the theoretical framework that describes the function of the LIDAR processor, as well as proof-of-concept experimental results. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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