NDLI: Performance of a 1319 nm laser radar using RF pulse compression

Content Provider	IEEE Xplore Digital Library
Author	Allen, C. Cobanoglu, Y. Sekken Kenny Chong Gogineni, S.
Copyright Year	2001
Description	Author affiliation: Radar Syst. & Remote Sensing Lab., Kansas Univ., Lawrence, KS, USA (Allen, C.)
Abstract	Spaceborne lidars have been shown to provide data on surface elevation, vegetation canopy heights, and aerosol characteristics. Satellites carrying lidars for measuring ice sheet surface elevation and vegetation canopy heights are scheduled to be launched in the next few years. To achieve the necessary resolution and sensitivity, lidars on these satellites will use short duration, high peak power transmit pulses. Because of their high peak power, these lidars must be operated with a low pulse repetition frequency (PRF). The high peak power operation results in limited lidar lifetime and the low PRF provides insufficient spatial samples along the satellite track. To overcome these limitations of high peak power systems, at the University of Kansas we have developed a low peak power laser radar using modern RF techniques and fiber-optic technologies developed in support of the communication industry. We used RF pulse compression to achieve the sensitivity needed for spaceborne applications and have increased the PRF to provide more dense sampling. We have developed and reported preliminary results of a fiber-optic-based, laser radar that applies RF pulse compression and digital signal processing techniques to improve receiver sensitivity and range measurement capabilities. With our improved super-heterodyne receiver, we have achieved receiver sensitivities below -100 dBm with transmit pulses with 40 /spl mu/s duration, 260 MHz bandwidth, and a 4 kHz PRF. These parameters are sufficient for altimeter operation from a satellite. We have modified the receiver architecture, performed detailed system simulations, developed a new data acquisition system, and conducted laboratory tests to verify simulation results. We present the system design, results of performance analyses and tests. We also show details on the two-stage down-conversion receiver with envelope detection and present issues concerning telescope-to-optical fiber coupling.
Starting Page	997
Ending Page	999
File Size	60778
Page Count	3
File Format	PDF
ISBN	0780370317
DOI	10.1109/IGARSS.2001.976726
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-07-09
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Laser radar Radio frequency Optical pulse compression Spaceborne radar Satellites Pulse power systems Vegetation Fiber lasers Laser modes Optical fiber communication
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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