Compact waveguide carbon dioxide array lasers and beam reformatting techniques for laser surface treatment applications

F. Villarreal, R. Abram, P. Blair, D. R. Jones, M. R. Taghizadeh, H. J. Baker, D. R. Hall

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

4 Citations (Scopus)

Abstract

A 2 kW waveguide carbon dioxide (CO2) laser array arranged in a compact 16×4 matrix is described. Each channel, of dimensions 2.25×2.25×590 mm, produces a near-perfect EH11 waveguide mode beam with a propagation distance before the onset of overlap of 250 mm. The 2 kW 16×4 two-dimensional (2-D) array produces an output beam of cross section approximately 50×40 mm in the near field. The laser head has external dimensions of 1000×200×200 mm. In addition, a compact and portable 7×1 element linear array producing an output of 100 W has been constructed for array reformatting and related experiments. The 7 individual 2.25×2.25×37 mm waveguides produce a 100 W output beam of cross section approximately 2.25×20 mm in the near field. The laser head has external dimensions of length 570 mm and diameter 100 mm. Both laser systems operate sealed-off. The results of close-packing the output from the two waveguide CO2 lasers using two separate beam reformatting techniques are presented. A modified version of the two-mirror Clarkson-Hanna arrangement, placed inside the laser, vacuum chamber, reformats the 4×16 matrix into an 8×8 close packed array, increasing the fill factor and brightness of the array both by a factor of two. Diffractive optical elements (DOEs) are employed to reformat the 7×1 array laser into a close-packed hexagon, 2+3+2, array.

Original languageEnglish
Title of host publicationLaser Institute of America, Proceedings
Subtitle of host publicationProceedings of the 1997 Laser Materials Processing Conference, ICALEO'97. Part 1 (of 2); San Diego, CA, USA; ; 17 November 1997 through 20 November 1997
PagesF148-F155
Volume83
Publication statusPublished - 1997
EventProceedings of the 1997 Laser Materials Processing Conference, ICALEO'97. Part 1 (of 2) - San Diego, CA, USA
Duration: 17 Nov 199720 Nov 1997

Conference

ConferenceProceedings of the 1997 Laser Materials Processing Conference, ICALEO'97. Part 1 (of 2)
CitySan Diego, CA, USA
Period17/11/9720/11/97

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    Villarreal, F., Abram, R., Blair, P., Jones, D. R., Taghizadeh, M. R., Baker, H. J., & Hall, D. R. (1997). Compact waveguide carbon dioxide array lasers and beam reformatting techniques for laser surface treatment applications. In Laser Institute of America, Proceedings: Proceedings of the 1997 Laser Materials Processing Conference, ICALEO'97. Part 1 (of 2); San Diego, CA, USA; ; 17 November 1997 through 20 November 1997 (Vol. 83, pp. F148-F155)