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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 25, Iss. 20 — Oct. 15, 2000
  • pp: 1511–1513

Enhanced photomultiplier sensitivity in spectroscopy systems

S. Hallensleben and P. D. Townsend  »View Author Affiliations


Optics Letters, Vol. 25, Issue 20, pp. 1511-1513 (2000)
http://dx.doi.org/10.1364/OL.25.001511


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Abstract

A fiber-ribbon-based coupling method is presented as a practical way to enhance light sensitivity in spectroscopic and similar systems employing a multialkali photomultiplier tube as a detector. The sensitivity enhancement is achieved by an increase in absorption in the photocathode through multiple total internal reflection in the photomultiplier entrance window. Improvements by factors of ∼2 (blue-green) to more than 10 (near infrared) have been measured. Implications for spectroscopic applications are discussed.

© 2000 Optical Society of America

OCIS Codes
(040.5250) Detectors : Photomultipliers
(060.2310) Fiber optics and optical communications : Fiber optics
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(230.0040) Optical devices : Detectors
(230.5480) Optical devices : Prisms
(310.6860) Thin films : Thin films, optical properties

Citation
S. Hallensleben and P. D. Townsend, "Enhanced photomultiplier sensitivity in spectroscopy systems," Opt. Lett. 25, 1511-1513 (2000)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-25-20-1511

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