Enhanced two-photon absorption in a hollow-core photonic-band-gap fiber

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.033833· OSTI ID:21541390

Saha, Kasturi; Venkataraman, Vivek; Londero, Pablo; Gaeta, Alexander L ^[1]

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1. School of Applied and Engineering Physics, Cornell University, Ithaca, NY 14853 (United States)

We show that two-photon absorption (TPA) in rubidium atoms can be greatly enhanced by the use of a hollow-core photonic-band-gap fiber. We investigate off-resonant, degenerate Doppler-free TPA on the 5S{sub 1/2{yields}}5D{sub 5/2} transition and observe 1% absorption of a pump beam with a total power of only 1 mW in the fiber. These results are verified by measuring the amount of emitted blue fluorescence and are consistent with the theoretical predictions which indicate that transit-time effects play an important role in determining the two-photon absorption cross section in a confined geometry.

• OSTI ID: 21541390
• Journal Information: Physical Review. A, Vol. 83, Issue 3; Other Information: DOI: 10.1103/PhysRevA.83.033833; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
BEAMS
CROSS SECTIONS
FLUORESCENCE
GRADED BAND GAPS
OPTICAL FIBERS
PHOTONS
RUBIDIUM
TWO-BODY PROBLEM
ALKALI METALS
BOSONS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
FIBERS
LUMINESCENCE
MANY-BODY PROBLEM
MASSLESS PARTICLES
METALS
PHOTON EMISSION
SORPTION