Guy N. Pearson
Guy N. Pearson has a total of 11 co-authors. Here are the top co-authors by number of shared publications:
Carlos Alegria
Optoelectronics Research Centre, University of Southampton, Building 46, Highfield, Southampton, UK
1 shared publication- Christophe A. Codemard
SPI Lasers UK Ltd. (United Kingdom)
1 shared publication David V. Willetts
The authors are with QinetiQ, St. Andrews Road, Malvern WR14 3PS, United Kingdom. G. N. Pearson’s address is
1 shared publicationJayanta K. Sahu
Optoelectronics Research Centre, University of Southampton, Building 46, Highfield, Southampton, UK
1 shared publication- Johan Nilsson
Optoelectronics Research Centre, University of Southampton, Southampton, U.K.
1 shared publication Justin R. Eacock
When this research was performed, all the authors were with QinetiQ, Malvern, St. Andrews Road, Worcestershire WR14 3PS, United Kingdom.P. J. Roberts is now with Blaze Photonics, Bath BA2 7A4, United Kingdom
1 shared publication
Latest Publications
- 10 January 2005
- Published by Optica Publishing Group in Applied Optics
- Vol. 44 (2) , 257-265
Chirp-pulse-compression three-dimensional lidar imager with fiber optics
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.
- 10 January 2005
- Published by Optica Publishing Group in Applied Optics
- Vol. 44 (2) , 257-265
Chirp-pulse-compression three-dimensional lidar imager with fiber optics
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.
- 15 November 2004
- Published by Optica Publishing Group in Optics Letters
- Vol. 29 (22) , 2590-2592
High-energy in-fiber pulse amplification for coherent lidar applications
An Er:Yb codoped fiber amplifier chain for the generation of pulses for coherent lidar applications at a wavelength near is reported. The final 1.8-m-long power amplification stage had a core diameter and yielded a 23-dB energy gain, resulting in 0.29-mJ, 100-ns pulses at a repetition rate of 4 kHz with no Brillouin scattering and an of 2.1.- 15 November 2004
- Published by Optica Publishing Group in Optics Letters
- Vol. 29 (22) , 2590-2592
High-energy in-fiber pulse amplification for coherent lidar applications
An Er:Yb codoped fiber amplifier chain for the generation of pulses for coherent lidar applications at a wavelength near is reported. The final 1.8-m-long power amplification stage had a core diameter and yielded a 23-dB energy gain, resulting in 0.29-mJ, 100-ns pulses at a repetition rate of 4 kHz with no Brillouin scattering and an of 2.1.- 20 October 2002
- Published by Optica Publishing Group in Applied Optics
- Vol. 41 (30) , 6442-6450
Analysis of the performance of a coherent pulsed fiber lidar for aerosol backscatter applications
The antenna and the Doppler estimation characteristics of a coherent pulsed lidar intended for short-range aerosol backscatter applications have been analyzed. The system used fiber-optic interconnects and operated at a wavelength of 1.548 µm. The range dependence of the signal for various bistatic and monostatic antenna configurations has been determined. The system operated in a low-pulse-energy, high-pulse-repetition-rate mode, and the Doppler estimates from the return signal were achieved with a multipulse accumulation procedure. The expected performance of the accumulation in this low-photocount regime was compared with the data obtained from the system, and a reasonable level of agreement was demonstrated.
- 20 October 2002
- Published by Optica Publishing Group in Applied Optics
- Vol. 41 (30) , 6442-6450
Analysis of the performance of a coherent pulsed fiber lidar for aerosol backscatter applications
The antenna and the Doppler estimation characteristics of a coherent pulsed lidar intended for short-range aerosol backscatter applications have been analyzed. The system used fiber-optic interconnects and operated at a wavelength of 1.548 µm. The range dependence of the signal for various bistatic and monostatic antenna configurations has been determined. The system operated in a low-pulse-energy, high-pulse-repetition-rate mode, and the Doppler estimates from the return signal were achieved with a multipulse accumulation procedure. The expected performance of the accumulation in this low-photocount regime was compared with the data obtained from the system, and a reasonable level of agreement was demonstrated.