Pearson, GN, Ridley, KD and Willetts, DV 2005, 'Chirp-pulse-compression three-dimensional lidar imager with fiber optics' , Applied Optics, 44 (2) , pp. 257-265.
Full text not available from this repository.Abstract
A coherent three-dimensional (angle-angle-range) lidar imager using a master-oscillator-power-amplifier concept and operating at a wavelength of 1.5 μm with chirp-pulse compression is described. A fiber-optic delay line in the local oscillator path enables a single continuous-wave semiconductor laser source with a modulated drive waveform to generate both the constant-frequency local oscillator and the frequency chirp. A portion of this chirp is gated out and amplified by a two-stage fiber amplifier. The digitized return signal was compressed by cross correlating it with a sample of the outgoing pulse. In this way a 350-ns, 10-μJ pulse with a 250-MHz frequency sweep is compressed to a width of approximately 8 ns. With a 25-mm output aperture, the lidar has been used to produce three-dimensional images of hard targets out to a range of approximately 2 km with near-diffraction-limited angular resolution and submeter range resolution.
| Item Type: | Article |
|---|---|
| Themes: | Subjects / Themes > T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication (Inc. www, lidar, radio, radar, phone, TV) Subjects outside of the University Themes |
| Schools: | Schools > School of the Built Environment |
| Journal or Publication Title: | Applied Optics |
| Publisher: | Optical Society of America |
| Refereed: | Yes |
| ISSN: | 0003-6935 |
| Depositing User: | H Kenna |
| Date Deposited: | 09 Oct 2007 14:32 |
| Last Modified: | 27 Aug 2021 22:03 |
| URI: | http://usir.salford.ac.uk/id/eprint/760 |
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