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Patent

Laser ring resonator with divergence compensation

Keimpe Andringa, +1 more
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TLDR
In this paper, a ring laser configuration operative to reduce divergence in the laser beam circulating within the ring and provided as an output is described, which includes an odd number of reflectors in the ring path with one or more polarizer crystals for providing input and output coupling.
Abstract: 
A ring laser configuration operative to reduce divergence in the laser beam circulating within the ring and provided as an output The ring laser configuration includes an odd number of reflectors in the ring path with one or more polarizer crystals for providing input and output coupling The use of an odd number of reflectors creates an inversion in each pass of the radiation through a flowing active medium within the ring path to provide averaging of the divergence effects of the medium in the flow direction

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Flashlamp-Excited Dye Lasers

Patrick N. Everett
TL;DR: Flashlamp-excited dye lasers (FEDL) as discussed by the authors are versatile sources of coherent light, which can be used with alternative dyes to cover a spectrum of about 300 nm.
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Laser oscillator and laser amplifier

Shuichi Fujikawa, +3 more
TL;DR: In this article, a 90-degree folding mirror is arranged such that the polarization direction of the laser oscillated light is parallel to the reference axis set in a plane perpendicular to an optical axis of the optical resonator.
Patent

Gas discharge laser oscillator and gas discharge laser amplifier providing linearly polarized light

Shuichi Fujikawa, +3 more
TL;DR: In this article, a 90-degree folding mirror is arranged such that the polarization direction of the laser oscillated light is parallel to the reference axis set in a plane perpendicular to an optical axis of the optical resonator.
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Patent

Frequency selective optical isolator

Giallorenzi T, +1 more
TL;DR: In this paper, a traveling wave optical oscillator (LASER) is used in a ring cavity to provide loss or gain in one direction in a two-direction system, respectively.