On the differences between the beam interaction characteristics of CO 2, Nd:YAG, excimer and high power diode lasers with a SiO 2/Al 2O 3 ceramic

J. Lawrence; Lin Li

doi:10.1080/08981500220151756

On the differences between the beam interaction characteristics of CO ₂, Nd:YAG, excimer and high power diode lasers with a SiO ₂/Al ₂O ₃ ceramic

J. Lawrence, Lin Li

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

By using a number of techniques and approaches certain differences between the beam interaction characteristics of CO ₂ laser, a Nd:YAG laser, a high power diode laser (HPDL) and an excimer laser with a SiO ₂/Al ₂O ₃ ceramic have been investigated. By employing a derivative of Beer-Lambert's law, the laser beam absorption lengths of the four lasers were calculated as 470±22μm for the CO ₂ laser, 195±12μm for the Nd:YAG laser, 177 ±15μm for the HPDL and 7.5 ±19μm for the excimer laser. The fluence threshold values at which significant material removal occurs the CO ₂ laser, Nd:YAG laser, HPDL and excimer laser were found to be 68, 128, 181 and 0.12J cm ^-2, respectively. Absorptivity measurements revealed that there is no correlation between the actual absorptivity of the SiO ₂/Al ₂O ₃ ceramic and the absorption length for each of the four lasers. The thermal loading values for the CO ₂ laser, the, Nd:YAG laser, the HPDL and the excimer laser were determined as 2.57, 6.73, 9.83 and 22.24 kJ cm ^-3, respectively. An examination of the laser induced meltpool propagation in the SiO ₂/Al ₂O ₃ ceramic revealed good agreement with the Stefan solution to the diffusion equation for the CO ₂, Nd:YAG and HPDLs.

Original language	English
Pages (from-to)	81-93
Number of pages	13
Journal	Lasers in Engineering
Volume	12
Issue number	2
DOIs	https://doi.org/10.1080/08981500220151756
Publication status	Published - 1 Dec 2002
Externally published	Yes

Keywords

Absorption
Ceramic
Interaction characteristis
Laser
Meltpool
Thermal loading
Threshold fluence

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Industrial and Manufacturing Engineering
Electrical and Electronic Engineering

Access to Document

10.1080/08981500220151756

Cite this

@article{40e45bdf40c24e3cbb609d403ae09843,

title = "On the differences between the beam interaction characteristics of CO 2, Nd:YAG, excimer and high power diode lasers with a SiO 2/Al 2O 3 ceramic",

abstract = "By using a number of techniques and approaches certain differences between the beam interaction characteristics of CO 2 laser, a Nd:YAG laser, a high power diode laser (HPDL) and an excimer laser with a SiO 2/Al 2O 3 ceramic have been investigated. By employing a derivative of Beer-Lambert's law, the laser beam absorption lengths of the four lasers were calculated as 470±22μm for the CO 2 laser, 195±12μm for the Nd:YAG laser, 177 ±15μm for the HPDL and 7.5 ±19μm for the excimer laser. The fluence threshold values at which significant material removal occurs the CO 2 laser, Nd:YAG laser, HPDL and excimer laser were found to be 68, 128, 181 and 0.12J cm -2, respectively. Absorptivity measurements revealed that there is no correlation between the actual absorptivity of the SiO 2/Al 2O 3 ceramic and the absorption length for each of the four lasers. The thermal loading values for the CO 2 laser, the, Nd:YAG laser, the HPDL and the excimer laser were determined as 2.57, 6.73, 9.83 and 22.24 kJ cm -3, respectively. An examination of the laser induced meltpool propagation in the SiO 2/Al 2O 3 ceramic revealed good agreement with the Stefan solution to the diffusion equation for the CO 2, Nd:YAG and HPDLs.",

keywords = "Absorption, Ceramic, Interaction characteristis, Laser, Meltpool, Thermal loading, Threshold fluence",

author = "J. Lawrence and Lin Li",

year = "2002",

month = dec,

day = "1",

doi = "10.1080/08981500220151756",

language = "English",

volume = "12",

pages = "81--93",

journal = "Lasers in Engineering",

issn = "0898-1507",

publisher = "Old City Publishing",

number = "2",

}

TY - JOUR

T1 - On the differences between the beam interaction characteristics of CO 2, Nd:YAG, excimer and high power diode lasers with a SiO 2/Al 2O 3 ceramic

AU - Lawrence, J.

AU - Li, Lin

PY - 2002/12/1

Y1 - 2002/12/1

N2 - By using a number of techniques and approaches certain differences between the beam interaction characteristics of CO 2 laser, a Nd:YAG laser, a high power diode laser (HPDL) and an excimer laser with a SiO 2/Al 2O 3 ceramic have been investigated. By employing a derivative of Beer-Lambert's law, the laser beam absorption lengths of the four lasers were calculated as 470±22μm for the CO 2 laser, 195±12μm for the Nd:YAG laser, 177 ±15μm for the HPDL and 7.5 ±19μm for the excimer laser. The fluence threshold values at which significant material removal occurs the CO 2 laser, Nd:YAG laser, HPDL and excimer laser were found to be 68, 128, 181 and 0.12J cm -2, respectively. Absorptivity measurements revealed that there is no correlation between the actual absorptivity of the SiO 2/Al 2O 3 ceramic and the absorption length for each of the four lasers. The thermal loading values for the CO 2 laser, the, Nd:YAG laser, the HPDL and the excimer laser were determined as 2.57, 6.73, 9.83 and 22.24 kJ cm -3, respectively. An examination of the laser induced meltpool propagation in the SiO 2/Al 2O 3 ceramic revealed good agreement with the Stefan solution to the diffusion equation for the CO 2, Nd:YAG and HPDLs.

AB - By using a number of techniques and approaches certain differences between the beam interaction characteristics of CO 2 laser, a Nd:YAG laser, a high power diode laser (HPDL) and an excimer laser with a SiO 2/Al 2O 3 ceramic have been investigated. By employing a derivative of Beer-Lambert's law, the laser beam absorption lengths of the four lasers were calculated as 470±22μm for the CO 2 laser, 195±12μm for the Nd:YAG laser, 177 ±15μm for the HPDL and 7.5 ±19μm for the excimer laser. The fluence threshold values at which significant material removal occurs the CO 2 laser, Nd:YAG laser, HPDL and excimer laser were found to be 68, 128, 181 and 0.12J cm -2, respectively. Absorptivity measurements revealed that there is no correlation between the actual absorptivity of the SiO 2/Al 2O 3 ceramic and the absorption length for each of the four lasers. The thermal loading values for the CO 2 laser, the, Nd:YAG laser, the HPDL and the excimer laser were determined as 2.57, 6.73, 9.83 and 22.24 kJ cm -3, respectively. An examination of the laser induced meltpool propagation in the SiO 2/Al 2O 3 ceramic revealed good agreement with the Stefan solution to the diffusion equation for the CO 2, Nd:YAG and HPDLs.

KW - Absorption

KW - Ceramic

KW - Interaction characteristis

KW - Laser

KW - Meltpool

KW - Thermal loading

KW - Threshold fluence

UR - http://www.scopus.com/inward/record.url?scp=24644481479&partnerID=8YFLogxK

U2 - 10.1080/08981500220151756

DO - 10.1080/08981500220151756

M3 - Article

AN - SCOPUS:24644481479

SN - 0898-1507

VL - 12

SP - 81

EP - 93

JO - Lasers in Engineering

JF - Lasers in Engineering

IS - 2

ER -