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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 30, Iss. 22 — Nov. 15, 2005
  • pp: 3072–3074

Coherence characteristics of electrically excited tandem organic light-emitting diodes

F. J. Duarte, L. S. Liao, and K. M. Vaeth  »View Author Affiliations

Optics Letters, Vol. 30, Issue 22, pp. 3072-3074 (2005)

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A tandem organic light-emitting diode structure, excited electrically in the pulsed domain and confined within a double spatial filter configuration, is observed to emit a low-divergence beam (Delta theta≈2.53 mrad, or ∼1.1 times the diffraction limit) with a near-Gaussian spatial distribution. The emission originates from the laser dye Coumarin 545 T, which is used as a dopant. Spectral coherence was determined by use of a double-slit interferometer. The interferometric distribution from our device approximates the interferometric pattern obtained from well-known lasers emitting at lambda≈540 nm.

© 2005 Optical Society of America

OCIS Codes
(050.1940) Diffraction and gratings : Diffraction
(230.3670) Optical devices : Light-emitting diodes
(260.3160) Physical optics : Interference
(350.5500) Other areas of optics : Propagation

ToC Category:
Optical Devices

F. J. Duarte, L. S. Liao, and K. M. Vaeth, "Coherence characteristics of electrically excited tandem organic light-emitting diodes," Opt. Lett. 30, 3072-3074 (2005)

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