65MHz bandwidth measurement of thermal emission induced by ArF excimer laser ablation of cornea

Miya Ishihara; Shunichi Sato; Tsunenori Arai; Minoru Obara; Makoto Kikuchi

doi:10.1117/12.388031

65MHz bandwidth measurement of thermal emission induced by ArF excimer laser ablation of cornea

Miya Ishihara, Shunichi Sato, Tsunenori Arai, Minoru Obara, Makoto Kikuchi

Department of Applied Physics and Physico-Informatics

Research output: Contribution to journal › Conference article › peer-review

2 Citations (Scopus)

Abstract

We measured thermal emission from cornea surface during and just after ArF excimer laser pulse with 65MHz bandwidth, corresponding to 15ns rise-time. The rise-time of the thermal emission measurement should be the same order of the heating pulse duration (ArF excimer laser pulse duration of 25ns) to obtain the rapid temperature change of cornea surface. To acquire the available rise-time, we employed a 150MHz cut off frequency photovoltaic HgCdTe detector with 100MHz preamplifiers. We measured the peak temperature of 175°C at the fluence of 160mJ/cm². The irradiated cornea temperature decreased rapidly with 280ns in time constant. We measured the highest temperature elevation during the ArF excimer laser ablation of the cornea comparing with previous reports using our high speed temperature measurement system.

Original language	English
Pages (from-to)	122-126
Number of pages	5
Journal	Unknown Journal
Volume	3914
DOIs	https://doi.org/10.1117/12.388031
Publication status	Published - 2000 Jan 1
Event	Laser-Tissue Interaction XI: Photochemical, Photothermal, and Photomechanical - San Jose, CA, USA Duration: 2000 Jan 22 → 2000 Jan 27

ASJC Scopus subject areas

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

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1117/12.388031

Cite this

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title = "65MHz bandwidth measurement of thermal emission induced by ArF excimer laser ablation of cornea",

abstract = "We measured thermal emission from cornea surface during and just after ArF excimer laser pulse with 65MHz bandwidth, corresponding to 15ns rise-time. The rise-time of the thermal emission measurement should be the same order of the heating pulse duration (ArF excimer laser pulse duration of 25ns) to obtain the rapid temperature change of cornea surface. To acquire the available rise-time, we employed a 150MHz cut off frequency photovoltaic HgCdTe detector with 100MHz preamplifiers. We measured the peak temperature of 175°C at the fluence of 160mJ/cm2. The irradiated cornea temperature decreased rapidly with 280ns in time constant. We measured the highest temperature elevation during the ArF excimer laser ablation of the cornea comparing with previous reports using our high speed temperature measurement system.",

author = "Miya Ishihara and Shunichi Sato and Tsunenori Arai and Minoru Obara and Makoto Kikuchi",

year = "2000",

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doi = "10.1117/12.388031",

language = "English",

volume = "3914",

pages = "122--126",

journal = "Mathematical Social Sciences",

issn = "0165-4896",

publisher = "Elsevier",

note = "Laser-Tissue Interaction XI: Photochemical, Photothermal, and Photomechanical ; Conference date: 22-01-2000 Through 27-01-2000",

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TY - JOUR

T1 - 65MHz bandwidth measurement of thermal emission induced by ArF excimer laser ablation of cornea

AU - Ishihara, Miya

AU - Sato, Shunichi

AU - Arai, Tsunenori

AU - Obara, Minoru

AU - Kikuchi, Makoto

PY - 2000/1/1

Y1 - 2000/1/1

N2 - We measured thermal emission from cornea surface during and just after ArF excimer laser pulse with 65MHz bandwidth, corresponding to 15ns rise-time. The rise-time of the thermal emission measurement should be the same order of the heating pulse duration (ArF excimer laser pulse duration of 25ns) to obtain the rapid temperature change of cornea surface. To acquire the available rise-time, we employed a 150MHz cut off frequency photovoltaic HgCdTe detector with 100MHz preamplifiers. We measured the peak temperature of 175°C at the fluence of 160mJ/cm2. The irradiated cornea temperature decreased rapidly with 280ns in time constant. We measured the highest temperature elevation during the ArF excimer laser ablation of the cornea comparing with previous reports using our high speed temperature measurement system.

AB - We measured thermal emission from cornea surface during and just after ArF excimer laser pulse with 65MHz bandwidth, corresponding to 15ns rise-time. The rise-time of the thermal emission measurement should be the same order of the heating pulse duration (ArF excimer laser pulse duration of 25ns) to obtain the rapid temperature change of cornea surface. To acquire the available rise-time, we employed a 150MHz cut off frequency photovoltaic HgCdTe detector with 100MHz preamplifiers. We measured the peak temperature of 175°C at the fluence of 160mJ/cm2. The irradiated cornea temperature decreased rapidly with 280ns in time constant. We measured the highest temperature elevation during the ArF excimer laser ablation of the cornea comparing with previous reports using our high speed temperature measurement system.

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DO - 10.1117/12.388031

M3 - Conference article

AN - SCOPUS:0033704888

SN - 0165-4896

VL - 3914

SP - 122

EP - 126

JO - Mathematical Social Sciences

JF - Mathematical Social Sciences

T2 - Laser-Tissue Interaction XI: Photochemical, Photothermal, and Photomechanical

Y2 - 22 January 2000 through 27 January 2000

ER -

65MHz bandwidth measurement of thermal emission induced by ArF excimer laser ablation of cornea

Abstract

ASJC Scopus subject areas

UN SDGs

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