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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 3 — Feb. 1, 2010
  • pp: 441–443

Two-photon excited highly polarized and directional upconversion emission from slab organic crystals

Hong-Hua Fang, Qi-Dai Chen, Jie Yang, Hong Xia, Yu-Guang Ma, Hai-Yu Wang, and Hong-Bo Sun  »View Author Affiliations

Optics Letters, Vol. 35, Issue 3, pp. 441-443 (2010)

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Effective upconversion emission from an organic crystal of cyano-substituted oligo (p-phenylenevinylene) (CNDPASDB) based on two-photon absorption is presented. Frequency upconverted cavityless lasing, or amplified spontaneous emission, from the crystal pumped by a femtosecond laser of 800 nm was observed when the excitation energy exceeded the threshold of 1.3 mJ pulse 1 cm 2 . Its polarization contrast was estimated to be 0.93 . This large ratio is due to the unified unidirectional configuration of the molecular long axis in crystal, beneficial to the stimulated emission with a low threshold. These results indicate that the present CNDPASDB crystal has a potential for upconversion laser device application.

© 2010 Optical Society of America

OCIS Codes
(160.4890) Materials : Organic materials
(190.4180) Nonlinear optics : Multiphoton processes
(190.7220) Nonlinear optics : Upconversion
(140.3613) Lasers and laser optics : Lasers, upconversion

ToC Category:

Original Manuscript: September 15, 2009
Revised Manuscript: December 9, 2009
Manuscript Accepted: December 17, 2009
Published: January 29, 2010

Hong-Hua Fang, Qi-Dai Chen, Jie Yang, Hong Xia, Yu-Guang Ma, Hai-Yu Wang, and Hong-Bo Sun, "Two-photon excited highly polarized and directional upconversion emission from slab organic crystals," Opt. Lett. 35, 441-443 (2010)

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