Multifocus structures of ultrashort self-focusing laser beam observed in a three-photon fluorescent medium

Guang S. He; Aping Zhang; Qingdong Zheng; Hai Yan Qin; Paras N. Prasad; Sailing He; Hans Ågren

doi:10.1109/JQE.2009.2014850

Multifocus structures of ultrashort self-focusing laser beam observed in a three-photon fluorescent medium

Guang S. He, Aping Zhang, Qingdong Zheng, Hai Yan Qin, Paras N. Prasad, Sailing He, Hans Ågren

Research output: Journal article publication › Journal article › Academic research › peer-review

5 Citations (Scopus)

Abstract

Self-focusing effect and multifocus structures of an ultrashort (∼160-fs) pulsed laser beam of ∼1.3-μm wavelength are investigated in several organic liquids. The intensity-dependent self-focusing formation and multifocus structures of the infrared (IR) laser beam were directly observed in a three-photon active fluorescent dye solution cell, in which a high contrast image of the spatial structure of the self-focusing beam can be obtained due to the cubic dependence of the fluorescence intensity on the local IR laser intensity. By combining this dye solution cell with another cell filled with various transparent organic liquids, the contributions of these tested liquids to the observed self-focusing effect are elucidated. The numerical simulations for this type of self-focusing behavior are presented, based on the assumption that the major contribution to the observed self-focusing is the nonlinear refractive-index change of the solvent due to electronic-cloud distortion. The simulation results are in fairly good agreement with the experimental results.

Original language	English
Pages (from-to)	816-824
Number of pages	9
Journal	IEEE Journal of Quantum Electronics
Volume	45
Issue number	7
DOIs	https://doi.org/10.1109/JQE.2009.2014850
Publication status	Published - 22 Jun 2009
Externally published	Yes

Keywords

Multifocus structure
Self-focusing
Three-photon excitation

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

More information

10.1109/JQE.2009.2014850

Cite this

@article{524bd667794b466ea7da1c48cc9b2e34,

title = "Multifocus structures of ultrashort self-focusing laser beam observed in a three-photon fluorescent medium",

abstract = "Self-focusing effect and multifocus structures of an ultrashort (∼160-fs) pulsed laser beam of ∼1.3-μm wavelength are investigated in several organic liquids. The intensity-dependent self-focusing formation and multifocus structures of the infrared (IR) laser beam were directly observed in a three-photon active fluorescent dye solution cell, in which a high contrast image of the spatial structure of the self-focusing beam can be obtained due to the cubic dependence of the fluorescence intensity on the local IR laser intensity. By combining this dye solution cell with another cell filled with various transparent organic liquids, the contributions of these tested liquids to the observed self-focusing effect are elucidated. The numerical simulations for this type of self-focusing behavior are presented, based on the assumption that the major contribution to the observed self-focusing is the nonlinear refractive-index change of the solvent due to electronic-cloud distortion. The simulation results are in fairly good agreement with the experimental results.",

keywords = "Multifocus structure, Self-focusing, Three-photon excitation",

author = "He, {Guang S.} and Aping Zhang and Qingdong Zheng and Qin, {Hai Yan} and Prasad, {Paras N.} and Sailing He and Hans {\AA}gren",

year = "2009",

month = jun,

day = "22",

doi = "10.1109/JQE.2009.2014850",

language = "English",

volume = "45",

pages = "816--824",

journal = "IEEE Journal of Quantum Electronics",

issn = "0018-9197",

publisher = "IEEE",

number = "7",

}

TY - JOUR

T1 - Multifocus structures of ultrashort self-focusing laser beam observed in a three-photon fluorescent medium

AU - He, Guang S.

AU - Zhang, Aping

AU - Zheng, Qingdong

AU - Qin, Hai Yan

AU - Prasad, Paras N.

AU - He, Sailing

AU - Ågren, Hans

PY - 2009/6/22

Y1 - 2009/6/22

N2 - Self-focusing effect and multifocus structures of an ultrashort (∼160-fs) pulsed laser beam of ∼1.3-μm wavelength are investigated in several organic liquids. The intensity-dependent self-focusing formation and multifocus structures of the infrared (IR) laser beam were directly observed in a three-photon active fluorescent dye solution cell, in which a high contrast image of the spatial structure of the self-focusing beam can be obtained due to the cubic dependence of the fluorescence intensity on the local IR laser intensity. By combining this dye solution cell with another cell filled with various transparent organic liquids, the contributions of these tested liquids to the observed self-focusing effect are elucidated. The numerical simulations for this type of self-focusing behavior are presented, based on the assumption that the major contribution to the observed self-focusing is the nonlinear refractive-index change of the solvent due to electronic-cloud distortion. The simulation results are in fairly good agreement with the experimental results.

AB - Self-focusing effect and multifocus structures of an ultrashort (∼160-fs) pulsed laser beam of ∼1.3-μm wavelength are investigated in several organic liquids. The intensity-dependent self-focusing formation and multifocus structures of the infrared (IR) laser beam were directly observed in a three-photon active fluorescent dye solution cell, in which a high contrast image of the spatial structure of the self-focusing beam can be obtained due to the cubic dependence of the fluorescence intensity on the local IR laser intensity. By combining this dye solution cell with another cell filled with various transparent organic liquids, the contributions of these tested liquids to the observed self-focusing effect are elucidated. The numerical simulations for this type of self-focusing behavior are presented, based on the assumption that the major contribution to the observed self-focusing is the nonlinear refractive-index change of the solvent due to electronic-cloud distortion. The simulation results are in fairly good agreement with the experimental results.

KW - Multifocus structure

KW - Self-focusing

KW - Three-photon excitation

UR - http://www.scopus.com/inward/record.url?scp=67249141576&partnerID=8YFLogxK

U2 - 10.1109/JQE.2009.2014850

DO - 10.1109/JQE.2009.2014850

M3 - Journal article

SN - 0018-9197

VL - 45

SP - 816

EP - 824

JO - IEEE Journal of Quantum Electronics

JF - IEEE Journal of Quantum Electronics

IS - 7

ER -

Multifocus structures of ultrashort self-focusing laser beam observed in a three-photon fluorescent medium

Abstract

Keywords

ASJC Scopus subject areas

More information

Other files and links

Fingerprint

Cite this