Mode and frequency control of compact CO2 slab lasers through intracavity coherent imaging

R. J. Morley, E. F. Yelden, H. J. Baker, D. R. Hall

Research output: Contribution to journalArticle

Abstract

The operation of a compact slab-waveguide CO2 laser at multimode output power levels of 90 W with greater than 14% efficiency was demonstrated. This is about five times the power per unit package length obtainable in typical square-bore waveguide lasers without resorting to complicated folded designs. A detailed modal study of the laser, as the resonator was scanned through a free spectral range, implied that the simultaneous existence of two or more modes in the output was ordinary for this simple multimode resonator design though oscillation was on a single laser line. By comparison, both single-mode and single-frequency operation was demonstrated by using an intracavity wire grid whose dimensions were selected to meet the needs of the waveguide-confined Talbot effect. A single-mode output power greater than 70% of the multimode system emission was obtained.

Original languageEnglish
Pages (from-to)418-425
Number of pages8
JournalApplied Optics
Volume34
Issue number3
Publication statusPublished - 1 Jan 1995

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