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Proceedings Paper

Progress on Raman laser for sodium resonance fluorescence lidar
Author(s): Steven X. Li; Anthony W. Yu; Michael A. Krainak; Yingxin Bai; Oleg Konoplev; Molly E. Fahey; Kenji Numata
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Paper Abstract

We are developing a Q-switched narrow linewidth intra-cavity Raman laser for a space based sodium lidar application. A novel Raman laser injection seeding scheme is proposed and is experimentally verified. A Q-switched, diode pumped, c-cut Nd:YVO4 laser has been designed to emit a fundamental wavelength at 1066.6 nm. This fundamental wavelength is used as the pump in an intra-cavity Raman conversion in a Gd0.2Y0.8VO4 composite material. By tuning the temperature of the crystal, we tuned the Raman shifting to the desired sodium absorption line.

A diode end pumped, T-shaped laser cavity has been built for experimental investigation. The fundamental pump laser cavity is a twisted mode cavity to eliminate the spatial hole burning for effective injection seeding. The Raman laser cavity is a linear standing wave cavity because Raman gain medium does not suffer spatial hole burning as traditional laser gain medium. The linewidth and temporal profile of the Raman laser is experimentally investigated with narrow and broadband fundamental pump emission. We have, for the first time, demonstrated an injection seeded, high peak power, narrow linewidth intra-cavity Raman laser for potential use in a sodium resonance fluorescence lidar.

Paper Details

Date Published: 15 February 2018
PDF: 10 pages
Proc. SPIE 10511, Solid State Lasers XXVII: Technology and Devices, 105111H (15 February 2018); doi: 10.1117/12.2290419
Show Author Affiliations
Steven X. Li, NASA Goddard Space Flight Ctr. (United States)
Anthony W. Yu, NASA Goddard Space Flight Ctr. (United States)
Michael A. Krainak, NASA Goddard Space Flight Ctr. (United States)
Yingxin Bai, NASA Goddard Space Flight Ctr. (United States)
Oleg Konoplev, NASA Goddard Space Flight Ctr. (United States)
Molly E. Fahey, NASA Goddard Space Flight Ctr. (United States)
Kenji Numata, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 10511:
Solid State Lasers XXVII: Technology and Devices
W. Andrew Clarkson; Ramesh K. Shori, Editor(s)

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