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Optics Letters

Optics Letters


  • Vol. 15, Iss. 4 — Feb. 15, 1990
  • pp: 236–238

422.7-nm atomic filter with superior solar background rejection

Jerry A. Gelbwachs  »View Author Affiliations

Optics Letters, Vol. 15, Issue 4, pp. 236-238 (1990)

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A novel atomic resonance filter with powerful solar background rejection is proposed. The filter wavelength matches the g Fraunhofer line at 422.7 nm. Atomic filtering occurs within the singlet manifold of neutral calcium. Superior sunlight discrimination arises mainly from two factors: overlay with an intense Fraunhofer line and signal levels devoid of fine and hyperfine structures. The new filter should exhibit high throughput and low noise.

© 1990 Optical Society of America

Original Manuscript: September 18, 1989
Manuscript Accepted: December 11, 1989
Published: February 15, 1990

Jerry A. Gelbwachs, "422.7-nm atomic filter with superior solar background rejection," Opt. Lett. 15, 236-238 (1990)

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