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Optics Letters

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  • Vol. 27, Iss. 23 — Dec. 2, 2002
  • pp: 2076–2078

Ultrasensitive and high-dynamic-range two-photon absorption in a GaAs photomultiplier tube

Jeffrey M. Roth, T. E. Murphy, and Chris Xu  »View Author Affiliations


Optics Letters, Vol. 27, Issue 23, pp. 2076-2078 (2002)
http://dx.doi.org/10.1364/OL.27.002076


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Abstract

We demonstrate improved efficiency and dynamic range for two-photon absorption at 1.5 µm in a photoelectron-counting GaAs photomultiplier tube. cw laser measurements show pure two-photon absorption occurring in the device from average powers of 1.3 µW to nearly 1 mW. We use the detector to implement an autocorrelator with peak-power × average-power sensitivity of 1.7 × 10-4 (mW)2 and discuss practical ways to reduce this figure of merit to as low as 1 × 10-5 (mW)2.

© 2002 Optical Society of America

OCIS Codes
(190.1900) Nonlinear optics : Diagnostic applications of nonlinear optics
(190.4180) Nonlinear optics : Multiphoton processes
(320.7100) Ultrafast optics : Ultrafast measurements

Citation
Jeffrey M. Roth, T. E. Murphy, and Chris Xu, "Ultrasensitive and high-dynamic-range two-photon absorption in a GaAs photomultiplier tube," Opt. Lett. 27, 2076-2078 (2002)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-27-23-2076


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