Journal ArticleDOI
Gain effects on laser mode formation
F. D. Feiock,J. R. Oldenettel +1 more
TLDR
In this paper, the authors extended the theory of mode formation in unstable resonators to include effects associated with the spatial and temporal distribution of spontaneous emissions that contribute to the mode, and the combined effect is a significant fraction of the previous theoretical value obtained by Anan'ev.Abstract:
The theory of mode formation in unstable resonators is extended to include effects associated with the spatial and the temporal distribution of spontaneous emissions that contribute to the mode. The spatial distribution smears the far-field pattern and requires additional round-trip propagations of about 2/ln(M) to give a well-formed mode. The temporal effect depends on the rise time of the small-signal gain. The combined effect is a significant fraction of the previous theoretical value obtained by Anan’ev [ Sov. J. Quantum Electron.5, 615 ( 1975)].read more
Citations
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Journal ArticleDOI
Theory of output beam divergence in pulsed unstable resonators
TL;DR: In this article, the evolution of the far-field pattern of pulsed large-Fresnel-number unstable resonators is analyzed, and both geometrical optic and physical optic descriptions are given as a function of the number of trips around the unstable resonator.
Journal ArticleDOI
Electron beam pumped argon-excimer laser using an unstable resonator
TL;DR: In this article, an unstable resonator was used for an e-beam pumped argon-excimer laser in the VUV-spectral region, for the first time to our knowledge.
Journal ArticleDOI
Unstable resonator modes for lasers with circular mirrors and high Fresnel numbers.
TL;DR: Four methods for obtaining mode structure by solving the complex integral equation are analyzed and lack of agreement for the lowest loss mode shows that approximations in the development of the second hybrid method cause the selection of the wrong geometrical mode.
Book ChapterDOI
Influence of Gain on Mode Structure and Loss
Norman Hodgson,Horst Weber +1 more
TL;DR: In this article, the beam cross section has to be defined to get a realistic expression for the output power of a laser resonator, and the mode radius w is defined by using the second intensity moments.
References
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Journal ArticleDOI
Establishment of oscillations in unstable resonators
TL;DR: In this paper, an analysis is made of two recent papers on the application of unstable resonators to high-gain laser systems and it is shown that many features of such lasers may be explained using the published treatments of the resonator theory.
Journal ArticleDOI
Transverse mode formation in low-magnification positive-branch unstable resonators.
R. W. Jones,Perkins Jf +1 more
TL;DR: In this paper, the dynamics of transverse mode formation time in positive-branch unstable resonators with low magnification (M = 1.32) and typical Fresnel numbers (279 < NT < 2700) used in high-energy lasers was investigated.