Effects of laser-induced breakdown, self-focusing, and plasma shielding on ultrashort-pulse propagation in the eye

Paul K. Kennedy; Ewan M. Wright; Quanyuan Feng; Kirk Cook; Daniel X. Hammer; Charles R. Thompson; Jerome V. Moloney; Benjamin A. Rockwell; Jeffrey J. Druessel; Alan C. Newell

doi:10.1117/12.239600

Effects of laser-induced breakdown, self-focusing, and plasma shielding on ultrashort-pulse propagation in the eye

Paul K. Kennedy, Ewan M. Wright, Quanyuan Feng, Kirk Cook, Daniel X. Hammer, Charles R. Thompson, Jerome V. Moloney, Benjamin A. Rockwell, Jeffrey J. Druessel, Alan C. Newell

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

3 Scopus citations

Abstract

As part of a research program to understand and model eye damage produced by exposure to subnanosecond laser pulses, an effort is currently being made to model and analyze ultrashort pulse propagation from the cornea to the retina. Both analytical models and numerical simulations are being used to analyze the effects of self-focusing, laser-induced breakdown (LIB), and plasma-pulse interaction. The modeling effort is coupled with experimental measurements of LIB thresholds and plasma shielding for visible, picosecond (psec) and femtosecond (fsec) pulses in water, which serves as a reasonable simulant for the vitreous humor of the eye. Comparison of LIB thresholds to the critical power for self-focusing indicates that self-focusing has little effect on LIB thresholds for long psec pulses. For short psec and fsec pulses, however, numerical simulations show that self-focusing is critical to LIB in water. These results indicate that self-focusing may play a role in fsec pulse ocular damage, by influencing whether LIB and plasma-pulse interaction occur at the retina, in the vitreous, or both. Both the location of the LIB event and the amount of plasma shielding can significantly effect the degree of damage.

Original language	English (US)
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering
Pages	390-401
Number of pages	12
Volume	2681
DOIs	https://doi.org/10.1117/12.239600
State	Published - 1996
Event	Laser-Tissue Interaction VII - San Jose, CA, USA Duration: Jan 29 1996 → Feb 1 1996

Other

Other	Laser-Tissue Interaction VII
City	San Jose, CA, USA
Period	1/29/96 → 2/1/96

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Access to Document

10.1117/12.239600

Cite this

Kennedy, P. K., Wright, E. M., Feng, Q., Cook, K., Hammer, D. X., Thompson, C. R., Moloney, J. V., Rockwell, B. A., Druessel, J. J., & Newell, A. C. (1996). Effects of laser-induced breakdown, self-focusing, and plasma shielding on ultrashort-pulse propagation in the eye. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 2681, pp. 390-401) https://doi.org/10.1117/12.239600

Kennedy, PK, Wright, EM, Feng, Q, Cook, K, Hammer, DX, Thompson, CR, Moloney, JV, Rockwell, BA, Druessel, JJ & Newell, AC 1996, Effects of laser-induced breakdown, self-focusing, and plasma shielding on ultrashort-pulse propagation in the eye. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 2681, pp. 390-401, Laser-Tissue Interaction VII, San Jose, CA, USA, 1/29/96. https://doi.org/10.1117/12.239600

@inproceedings{917f8a623ea74e54905e655318ca95bd,

title = "Effects of laser-induced breakdown, self-focusing, and plasma shielding on ultrashort-pulse propagation in the eye",

abstract = "As part of a research program to understand and model eye damage produced by exposure to subnanosecond laser pulses, an effort is currently being made to model and analyze ultrashort pulse propagation from the cornea to the retina. Both analytical models and numerical simulations are being used to analyze the effects of self-focusing, laser-induced breakdown (LIB), and plasma-pulse interaction. The modeling effort is coupled with experimental measurements of LIB thresholds and plasma shielding for visible, picosecond (psec) and femtosecond (fsec) pulses in water, which serves as a reasonable simulant for the vitreous humor of the eye. Comparison of LIB thresholds to the critical power for self-focusing indicates that self-focusing has little effect on LIB thresholds for long psec pulses. For short psec and fsec pulses, however, numerical simulations show that self-focusing is critical to LIB in water. These results indicate that self-focusing may play a role in fsec pulse ocular damage, by influencing whether LIB and plasma-pulse interaction occur at the retina, in the vitreous, or both. Both the location of the LIB event and the amount of plasma shielding can significantly effect the degree of damage.",

author = "Kennedy, {Paul K.} and Wright, {Ewan M.} and Quanyuan Feng and Kirk Cook and Hammer, {Daniel X.} and Thompson, {Charles R.} and Moloney, {Jerome V.} and Rockwell, {Benjamin A.} and Druessel, {Jeffrey J.} and Newell, {Alan C.}",

year = "1996",

doi = "10.1117/12.239600",

language = "English (US)",

isbn = "0819420557",

volume = "2681",

pages = "390--401",

booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",

note = "Laser-Tissue Interaction VII ; Conference date: 29-01-1996 Through 01-02-1996",

}

TY - GEN

T1 - Effects of laser-induced breakdown, self-focusing, and plasma shielding on ultrashort-pulse propagation in the eye

AU - Kennedy, Paul K.

AU - Wright, Ewan M.

AU - Feng, Quanyuan

AU - Cook, Kirk

AU - Hammer, Daniel X.

AU - Thompson, Charles R.

AU - Moloney, Jerome V.

AU - Rockwell, Benjamin A.

AU - Druessel, Jeffrey J.

AU - Newell, Alan C.

PY - 1996

Y1 - 1996

N2 - As part of a research program to understand and model eye damage produced by exposure to subnanosecond laser pulses, an effort is currently being made to model and analyze ultrashort pulse propagation from the cornea to the retina. Both analytical models and numerical simulations are being used to analyze the effects of self-focusing, laser-induced breakdown (LIB), and plasma-pulse interaction. The modeling effort is coupled with experimental measurements of LIB thresholds and plasma shielding for visible, picosecond (psec) and femtosecond (fsec) pulses in water, which serves as a reasonable simulant for the vitreous humor of the eye. Comparison of LIB thresholds to the critical power for self-focusing indicates that self-focusing has little effect on LIB thresholds for long psec pulses. For short psec and fsec pulses, however, numerical simulations show that self-focusing is critical to LIB in water. These results indicate that self-focusing may play a role in fsec pulse ocular damage, by influencing whether LIB and plasma-pulse interaction occur at the retina, in the vitreous, or both. Both the location of the LIB event and the amount of plasma shielding can significantly effect the degree of damage.

AB - As part of a research program to understand and model eye damage produced by exposure to subnanosecond laser pulses, an effort is currently being made to model and analyze ultrashort pulse propagation from the cornea to the retina. Both analytical models and numerical simulations are being used to analyze the effects of self-focusing, laser-induced breakdown (LIB), and plasma-pulse interaction. The modeling effort is coupled with experimental measurements of LIB thresholds and plasma shielding for visible, picosecond (psec) and femtosecond (fsec) pulses in water, which serves as a reasonable simulant for the vitreous humor of the eye. Comparison of LIB thresholds to the critical power for self-focusing indicates that self-focusing has little effect on LIB thresholds for long psec pulses. For short psec and fsec pulses, however, numerical simulations show that self-focusing is critical to LIB in water. These results indicate that self-focusing may play a role in fsec pulse ocular damage, by influencing whether LIB and plasma-pulse interaction occur at the retina, in the vitreous, or both. Both the location of the LIB event and the amount of plasma shielding can significantly effect the degree of damage.

UR - http://www.scopus.com/inward/record.url?scp=0029748796&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029748796&partnerID=8YFLogxK

U2 - 10.1117/12.239600

DO - 10.1117/12.239600

M3 - Conference contribution

AN - SCOPUS:0029748796

SN - 0819420557

SN - 9780819420558

VL - 2681

SP - 390

EP - 401

BT - Proceedings of SPIE - The International Society for Optical Engineering

T2 - Laser-Tissue Interaction VII

Y2 - 29 January 1996 through 1 February 1996

ER -

Effects of laser-induced breakdown, self-focusing, and plasma shielding on ultrashort-pulse propagation in the eye

Abstract

Other

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this