Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/43771
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- Title
- Propagation of laser beams formed by unstable resonators with different magnifications
- Related
- Canadian journal of physics, Vol. 84, Issue 3, p.241-252
- DOI
- 10.1139/P06-013
- Publisher
- National Research Council
- Date
- 2006
- FoR/RFCD Code(s)
-
020501 Classical and Physical Optics
- Author/Creator
- Saghafi, S
- Author/Creator
- Withford, M. J
- Author/Creator
- Piper, J. A
- Description
- Laser beams generated from high-magnification on-axis unstable resonators using hard-edged axial scraper mirrors and output couplers consisting of axial spot reflectors typically have an annular distribution in the near field (i.e., a flat-top profile with a hole in the middle for an axially coupled beam). We employ a new model, based on the flattened Gaussian beam (FGB) concept, to describe the propagation of such annular near-field beams. The superposition of two FGBs, whose flatness and steepness of edges are controlled by defined parameters (i.e., the beam width and the order), is used to analyze the output beam intensity profile along the propagation axis. We apply this model to characterize the output beams of copper vapour lasers employing unstable resonators of different magnifications (M = 80, 200, and 400). We show that once the model is fitted to the beam intensity profile at any two positions along the axis of propagation, it can be used to predict the beam shape at any position.
- Description
- 12 page(s)
- Subject Keyword
- 020501 Classical and Physical Optics
- Subject Keyword
- lasers
- Subject Keyword
- gas lasers
- Subject Keyword
- laser optical systems
- Subject Keyword
- laser beams
- Subject Keyword
- resonators
- Subject Keyword
- Gaussian beams
- Subject Keyword
- Gaussian processes
- Resource Type
- journal article
- Organisation
- Macquarie University. Dept. of Physics
- Organisation
- Macquarie University. Office of the Deputy Vice-Chancellor (Research)
- Identifier
- http://hdl.handle.net/1959.14/43771
- Identifier
- ISSN:1208-6045
- Identifier
- mq-rm-2006002930
- Language
- eng
- Rights
- Publisher PDF allowed as per publisher agreement.
- Rights
- Copyright 2006 NRC Research Press. Published in Canadian journal of physics, Volume 84, Issue 3. The original article can be found at http://dx.doi.org/10.1139/P06-013.
- Full Text
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