title: Narrow band fiber-optic phase-shifted Fabry-Perot Bragg grating filters for atmospheric water vapor lidar measurements.
abstract: A unique ultranarrowband fiber-optic phase-shifted Fabry-Perot Bragg grating filter for atmospheric water vapor lidar measurements was designed, fabricated, and successfully tested. Customized optical fiber Bragg gratings were fabricated so that two transmission filter peaks occurred: one (89% transmission, 8 pm FWHM) near the 946-nm water vapor absorption line and the other peak (80% transmission, 4 pm FWHM) at a region of no absorption. Both transmission peaks were within a 2.66-nm stop band. Demonstration of tension tuning to the 946.0003-nm water vapor line was achieved, and the performance characterization of custom-made optical fiber Bragg grating filters are presented. These measurements are successfully compared to theoretical calculations using a piecewise-matrix form of the coupled-mode equations.
authors.affiliation: Sciences Directorate, NASA Langley Research Center, MS401, Hampton, Virginia 23681, USA.
authors.forename: Lelia B
authors.initials: LB
authors.lastname: Vann
authors.forename: Russell J
authors.initials: RJ
authors.lastname: DeYoung
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Mihailov
authors.forename: Ping
authors.initials: P
authors.lastname: Lu
authors.forename: Dan
authors.initials: D
authors.lastname: Grobnic
authors.forename: Robert
authors.initials: R
authors.lastname: Walker