Polarization switching of sodium guide star laser for brightness enhancement

被引：0
作者：
Fan, Tingwei [1 ,2 ,3 ]
Zhou, Tianhua [1 ,2 ]
Feng, Yan [1 ,2 ]
机构：
[1] Chinese Acad Sci, Shanghai Key Lab Solid State Laser & Applicat, Shanghai 201800, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
ADAPTIVE OPTICS SYSTEMS V | 2016年 / 9909卷
关键词：
Polarization switching; laser guide stars; Larmor precession; geomagnetic field; EXCITATION; LAYER;
D O I：
10.1117/12.2229514
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The efficiency of optical pumping that enhances the brightness of sodium laser guide star with circularly polarized light is reduced substantially due to the precession of sodium atoms in geomagnetic field. Switching the laser between left and right circular polarization at the Larmor frequency is proposed to improve the photon return. With ESO's cw laser guide star system at Paranal as example, numerical simulation for both square-wave and sine-wave polarization modulation is conducted. For the square-wave switching case, the return flux is increased when the angle between geomagnetic field and laser beam is larger than 60 degrees, as much as 40% at 90 degrees. The method can also be applied for remote measurement of magnetic field with available cw guide star laser.
引用
收藏
页数：8
相关论文
共 23 条
  • [1] Ageorges N., 2000, LASER GUIDE STAR ADA, P67
  • [2] [Anonymous], 2011, NAT PHOTONICS, V5, P16
  • [3] Babcock H. W., 1953, Publ. Astron. Soc. Pac, V65, P229, DOI [10.1086/126606, DOI 10.1086/126606]
  • [4] PULSE-TRAIN EXCITATION OF SODIUM FOR USE AS A SYNTHETIC BEACON
    BRADLEY, LC
    [J]. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1992, 9 (10) : 1931 - 1944
  • [5] Future optical technologies for telescopes
    Cunningham, Colin
    [J]. NATURE PHOTONICS, 2009, 3 (05) : 239 - 241
  • [6] Drummond J., 2007, P AMOS TECHN C SEPT
  • [7] ATMOSPHERIC-TURBULENCE COMPENSATION BY RESONANT OPTICAL BACKSCATTERING FROM THE SODIUM LAYER IN THE UPPER-ATMOSPHERE
    HAPPER, W
    MACDONALD, GJ
    MAX, CE
    DYSON, FJ
    [J]. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 1994, 11 (01): : 263 - 276
  • [8] Magnetometry with mesospheric sodium
    Higbie, James M.
    Rochester, Simon M.
    Patton, Brian
    Holzoehner, Ronald
    Calia, Domenico Bonaccini
    Budker, Dmitry
    [J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2011, 108 (09) : 3522 - 3525
  • [9] Optimization of cw sodium laser guide star efficiency
    Holzloehner, R.
    Rochester, S. M.
    Calia, D. Bonaccini
    Budker, D.
    Higbie, J. M.
    Hackenberg, W.
    [J]. ASTRONOMY & ASTROPHYSICS, 2010, 510
  • [10] Holzlohner R., 2012, P SOC PHOTO-OPT INS, V8447
123