Power scaling in slab waveguide CO2 lasers

K. M. Abramski, A. D. Colley, P. E. Jackson, H. J. Baker, D. R. Hall

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Measurements of laser characteristics were made relative to the performance of an optimum-design, square-cross-section waveguide channel of 2.25- × 2.25- × 376-mm3 dimensions. This single channel emits 32 W (85 W/m) when excited at 125 MHz using a 3:1:1 He:N2:CO2 mixture augmented by the additional of 5% xenon. The ceramic sidewalls were progressively separaped by multiples of 2.25 mm to create a sequence of slab widths corresponding to between one and eight equivalent waveguide channels. For eight channels a power of 036 W, corresponding to a 17-W/equivalent channel or 53% that of a single channel, was observed. As the slab width increased, the optimum pressure decreased from 110 to 75 torr and the efficiency increased somewhat. The smooth transition of optimum conditions from two to five channels reflects the changeover from 2-D to 1-D heat flow and diffusion. At eight channels this transition is complete, and the power is proportional to an increasing electrode area. These results show that the power can be scaled as 20 kW/m2 of discharge area for large aspect ratios under conditions suitable for sealed-off operation.

Original languageEnglish
Title of host publicationCONFERENCE ON LASERS AND ELECTRO-0PTICS
Pages272-
Publication statusPublished - 1989
EventConference on Lasers and Electro-Optics 1989 - Baltimore, MD, United States
Duration: 24 Apr 198928 Apr 1989

Conference

ConferenceConference on Lasers and Electro-Optics 1989
CountryUnited States
CityBaltimore, MD
Period24/04/8928/04/89

Fingerprint

waveguide lasers
slabs
scaling
waveguides
heat transmission
xenon
aspect ratio
ceramics
electrodes
cross sections

Cite this

Abramski, K. M., Colley, A. D., Jackson, P. E., Baker, H. J., & Hall, D. R. (1989). Power scaling in slab waveguide CO2 lasers. In CONFERENCE ON LASERS AND ELECTRO-0PTICS (pp. 272-)
Abramski, K. M. ; Colley, A. D. ; Jackson, P. E. ; Baker, H. J. ; Hall, D. R. / Power scaling in slab waveguide CO2 lasers. CONFERENCE ON LASERS AND ELECTRO-0PTICS. 1989. pp. 272-
@inproceedings{9922c6b354454ef4acedb6acff9f4672,
title = "Power scaling in slab waveguide CO2 lasers",
abstract = "Measurements of laser characteristics were made relative to the performance of an optimum-design, square-cross-section waveguide channel of 2.25- × 2.25- × 376-mm3 dimensions. This single channel emits 32 W (85 W/m) when excited at 125 MHz using a 3:1:1 He:N2:CO2 mixture augmented by the additional of 5{\%} xenon. The ceramic sidewalls were progressively separaped by multiples of 2.25 mm to create a sequence of slab widths corresponding to between one and eight equivalent waveguide channels. For eight channels a power of 036 W, corresponding to a 17-W/equivalent channel or 53{\%} that of a single channel, was observed. As the slab width increased, the optimum pressure decreased from 110 to 75 torr and the efficiency increased somewhat. The smooth transition of optimum conditions from two to five channels reflects the changeover from 2-D to 1-D heat flow and diffusion. At eight channels this transition is complete, and the power is proportional to an increasing electrode area. These results show that the power can be scaled as 20 kW/m2 of discharge area for large aspect ratios under conditions suitable for sealed-off operation.",
author = "Abramski, {K. M.} and Colley, {A. D.} and Jackson, {P. E.} and Baker, {H. J.} and Hall, {D. R.}",
year = "1989",
language = "English",
isbn = "1557520860",
pages = "272--",
booktitle = "CONFERENCE ON LASERS AND ELECTRO-0PTICS",

}

Abramski, KM, Colley, AD, Jackson, PE, Baker, HJ & Hall, DR 1989, Power scaling in slab waveguide CO2 lasers. in CONFERENCE ON LASERS AND ELECTRO-0PTICS. pp. 272-, Conference on Lasers and Electro-Optics 1989, Baltimore, MD, United States, 24/04/89.

Power scaling in slab waveguide CO2 lasers. / Abramski, K. M.; Colley, A. D.; Jackson, P. E.; Baker, H. J.; Hall, D. R.

CONFERENCE ON LASERS AND ELECTRO-0PTICS. 1989. p. 272-.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Power scaling in slab waveguide CO2 lasers

AU - Abramski, K. M.

AU - Colley, A. D.

AU - Jackson, P. E.

AU - Baker, H. J.

AU - Hall, D. R.

PY - 1989

Y1 - 1989

N2 - Measurements of laser characteristics were made relative to the performance of an optimum-design, square-cross-section waveguide channel of 2.25- × 2.25- × 376-mm3 dimensions. This single channel emits 32 W (85 W/m) when excited at 125 MHz using a 3:1:1 He:N2:CO2 mixture augmented by the additional of 5% xenon. The ceramic sidewalls were progressively separaped by multiples of 2.25 mm to create a sequence of slab widths corresponding to between one and eight equivalent waveguide channels. For eight channels a power of 036 W, corresponding to a 17-W/equivalent channel or 53% that of a single channel, was observed. As the slab width increased, the optimum pressure decreased from 110 to 75 torr and the efficiency increased somewhat. The smooth transition of optimum conditions from two to five channels reflects the changeover from 2-D to 1-D heat flow and diffusion. At eight channels this transition is complete, and the power is proportional to an increasing electrode area. These results show that the power can be scaled as 20 kW/m2 of discharge area for large aspect ratios under conditions suitable for sealed-off operation.

AB - Measurements of laser characteristics were made relative to the performance of an optimum-design, square-cross-section waveguide channel of 2.25- × 2.25- × 376-mm3 dimensions. This single channel emits 32 W (85 W/m) when excited at 125 MHz using a 3:1:1 He:N2:CO2 mixture augmented by the additional of 5% xenon. The ceramic sidewalls were progressively separaped by multiples of 2.25 mm to create a sequence of slab widths corresponding to between one and eight equivalent waveguide channels. For eight channels a power of 036 W, corresponding to a 17-W/equivalent channel or 53% that of a single channel, was observed. As the slab width increased, the optimum pressure decreased from 110 to 75 torr and the efficiency increased somewhat. The smooth transition of optimum conditions from two to five channels reflects the changeover from 2-D to 1-D heat flow and diffusion. At eight channels this transition is complete, and the power is proportional to an increasing electrode area. These results show that the power can be scaled as 20 kW/m2 of discharge area for large aspect ratios under conditions suitable for sealed-off operation.

UR - http://www.scopus.com/inward/record.url?scp=17144446054&partnerID=8YFLogxK

M3 - Conference contribution

SN - 1557520860

SP - 272-

BT - CONFERENCE ON LASERS AND ELECTRO-0PTICS

ER -

Abramski KM, Colley AD, Jackson PE, Baker HJ, Hall DR. Power scaling in slab waveguide CO2 lasers. In CONFERENCE ON LASERS AND ELECTRO-0PTICS. 1989. p. 272-