NDLI: Laser energy monitor for double-pulsed 2-micrometer ipda lidar application

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Laser energy monitor for double-pulsed 2-micrometer ipda lidar application

Content Provider	NASA Technical Reports Server (NTRS)
Author	Remus, Ruben Yu, Jirong Petros, Mulugeta Singh, Upendra N. Refaat, Tamer F.
Copyright Year	2014
Description	Integrated path differential absorption (IPDA) lidar is a remote sensing technique for monitoring different atmospheric species. The technique relies on wavelength differentiation between strong and weak absorbing features normalized to the transmitted energy. 2-micron double-pulsed IPDA lidar is best suited for atmospheric carbon dioxide measurements. In such case, the transmitter produces two successive laser pulses separated by short interval (200 microseconds), with low repetition rate (10Hz). Conventional laser energy monitors, based on thermal detectors, are suitable for low repetition rate single pulse lasers. Due to the short pulse interval in double-pulsed lasers, thermal energy monitors underestimate the total transmitted energy. This leads to measurement biases and errors in double-pulsed IPDA technique. The design and calibration of a 2-micron double-pulse laser energy monitor is presented. The design is based on a high-speed, extended range InGaAs pin quantum detectors suitable for separating the two pulse events. Pulse integration is applied for converting the detected pulse power into energy. Results are compared to a photo-electro-magnetic (PEM) detector for impulse response verification. Calibration included comparing the three detection technologies in single-pulsed mode, then comparing the pin and PEM detectors in double-pulsed mode. Energy monitor linearity will be addressed.
File Size	283948
Page Count	8
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20150001516
Archival Resource Key	ark:/13960/t86h9jz70
Language	English
Publisher Date	2014-09-22
Access Restriction	Open
Subject Keyword	Earth Resources And Remote Sensing Differential Absorption Lidar Indium Gallium Arsenides Atmospheric Composition Transmitters Bias Carbon Dioxide Concentration Monitors Pulsed Lasers Pulses Remote Sensing Thermal Energy Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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