Advertisement

Satellite-Satellite Laser Links for Future Gravity Missions

  • P. L. Bender
  • J. L. Hall
  • J. Ye
  • W. M. Klipstein
  • Scientific Reports Office
Part of the Space Sciences Series of ISSI book series (SSSI, volume 17)

Abstract

Abstract. A strong candidate for use in future missions to map time variations in the Earth’s gravity field is laser heterodyne measurements between separate spacecraft. At the shortest wavelengths that can be measured in space, the main accuracy limitation for variations in the potential with latitude is expected to be the frequency stability of the laser. Thus the development of simple and reliable space-qualified lasers with high frequency stability appears to be an important goal for the near future.

In the last few years, quite high stability has been achieved by locking the second harmonic of a Nd:YAG laser to a resonant absorption line of iodine molecules in an absorption cell. Such a laser system can be made quite robust, and temperature related frequency shifts can be controlled at a low value. Recent results from laboratory systems are described. The Allan standard deviation for the beat between two such lasers was 2 × 10−14 at 10 s, and reached 7 × 10−15 at 600 s.

Keywords

Iodine Molecule Spacecraft Separation Fractional Fluctuation Laser Frequency Noise High Frequency Stability 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Bender, PL.: 1992. ‘Integrated laser Doppler method tor measuring planetary gravity fields.’ in From Mars 10 Greenland: Charting Gravity wilh Space and Airborne Instruments. 1AG Symposium. Vol. 110, Springer-Verlag, pp. 63–72.Google Scholar
  2. Cheng, W.-Y., Chen, I., Yoon, T.-H., Hall, J. I, and Ye. J.: 2002, ‘Sub-Doppler molecular iodine transitions near the dissociation limit (523 to 498 nm),’ Opt. Lett. 827. p. 571.CrossRefGoogle Scholar
  3. Colombo. O.L. and Chao, B.F.: 1992. ‘Global gravitational change from space in 2001,’ IAG Symposium Vol. 112, Potsdam.Google Scholar
  4. Danzmann, K.V. et al.: 1998, LISA-Laser Interferometer Space AnLenna Pre-Phase A Report, 2nd edit, MPQ 233.Google Scholar
  5. Hammesahr. A,: 2001 ‘LISA mission study overview,’ Class, and Quantum Grav. 18. pp. 4045–4051.Google Scholar
  6. Ishibasbi, C., Ye, J. and Hall, J.L.: 2002. ‘Issues and applications in ultra-sensitive molecular spectroscopy,’ in Melhods for Ultrasensitive Detection 11, C. W. Wilkerson, Jr., Ed.. SPIE Vol. 4634 pp. 58–69.Google Scholar
  7. LISA Study Team: 2000, ‘LISA Laser Interferometer Space Antenna: a Cornerstone Mission for the Observation of Gravitational Waves,’ ESA-SCI(2000)I I, European Space Agency.Google Scholar
  8. Robertson, D. L., McNamara, P., Ward, H. and Hough, J.: 1997. ‘Optics for LISA,“ Class, and Quantum Grav. 14. pp. 1575–1577.CrossRefGoogle Scholar
  9. Schumaker, B.L.: 1990. ‘Scientific Applications of Frequency-Stabilized Laser Technology in Space.’ Jet Propulsion Laboratory Pub. 90–50, Caltech, Pasadena. CA. pp. 133–146.Google Scholar
  10. Watkins, M.M., Folkner, W.M., Chao, B. and Tapley, B.D.: 2000, ‘EX-5: A laser interferometer follow-on to the GRACE mission,’ presented at GGG2000. Banff. Canada. 31 July - 5 August, 2000 (unpublished).Google Scholar
  11. Ye. J., Robertson, L., Picard, S., Ma, L.-S., and Hall, J. L.: 1999. “Absolute frequency atlas of molecular h lines al 532 nm,’ IEEE Trans. Instrum. Meas. 48, pp. 544–549.Google Scholar
  12. Ye. J., L.-S., Maland, J. L. Hall: 2001. ‘Molecular iodine clock,’ Phys. Rev. Leu. 87. pp. 270801/1–4.Google Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2003

Authors and Affiliations

  • P. L. Bender
    • 1
  • J. L. Hall
    • 1
  • J. Ye
    • 1
  • W. M. Klipstein
    • 2
  • Scientific Reports Office
    • 3
  1. 1.National Institute of Standards and Technology and University of ColoradoJILABoulderUSA
  2. 2.Jet Propulsion LaboratoryCalifornia Institute of TechnologyPasadenaUSA
  3. 3.JILABoulderUSA

Personalised recommendations