DocumentCode :
3455507
Title :
A narrow band fiber Bragg grating filter for lidar receivers
Author :
De Young, R.J.
Author_Institution :
NASA Langley Res. Center, Hampton, VA, USA
fYear :
2001
fDate :
11-11 May 2001
Firstpage :
494
Lastpage :
495
Abstract :
Summary form only given. For a space-based water vapor differential absorption lidar (DIAL) system there is a need for improved optical receiver filters especially for daytime operation to reject background radiation on the detector. Present dielectric interference filters have transmission bandwidths of approximately 1 nm and are not tunable. To achieve good system performance the daytime filter bandwidth should be 10 pm a factor of about 100 narrower than interference filters. Unless a better filter can be found, future space based DIAL systems may only be able to operate at night. Fortunately a new technology has emerged that could allow very narrow bandwidth filters to be made in optical fibers. These Bragg gratings have been applied to the communications industry at the 1.55-micron wavelength, but there is evidence that the same technology will work at the 946 nm wavelength of interest to water vapor DIAL receivers. The paper discuss research on the testing of a new optical receiver using an ultra-narrow fiber Bragg grating optical filter at 946 nm for potential use on space borne lidar.
Keywords :
Bragg gratings; airborne radar; optical fibre filters; optical fibre testing; optical radar; optical receivers; remote sensing by laser beam; 946 nm; Bragg gratings; DIAL; background radiation; communications industry; daytime; daytime operation; dielectric interference filters; filter bandwidth; interference filters; lidar receivers; narrow band fiber Bragg grating filter; night operation; optical fibers; optical receiver; optical receiver filters; space based DIAL systems; space borne lidar systems; space-based water vapor differential absorption lidar system; system performance; testing; transmission bandwidths; ultra-narrow fiber Bragg grating optical filter; very narrow bandwidth filters; water vapor DIAL receivers; Absorption; Bandwidth; Interference; Laser radar; Narrowband; Optical fiber filters; Optical filters; Optical receivers; Radiation detectors; Space technology;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Lasers and Electro-Optics, 2001. CLEO '01. Technical Digest. Summaries of papers presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-662-1
Type :
conf
DOI :
10.1109/CLEO.2001.948088
Filename :
948088
Link To Document :
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