Polycrystalline fiber optical waveguides for infrared transmission

Pinnow, D. A.; Gentile, A. L.; Standlee, A. G.; Timper, A. J.; Hobrock, L. M.

doi:10.1109/jqe.1977.1069591

Cited by 8 publications

(10 citation statements)

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“…The reproducibility of the data was 0.005 g/cm 3 for crystals 100 to 150 g in weight and 0.01 g/cm 3 for samples 8-12 g in weight. The density of the KRS-13 samples was 6.12-6.24 g/cm 3 , and that of KRS-11 was 5.96-6.03 g/cm 3 . The plot of density versus composition (chemical analysis data) for the solid solutions shows a slight negative deviation from linearity (Fig.…”

Section: Methodsmentioning

confidence: 90%

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Synthesis and structural properties of AgCl1 - xBrx (x = 0.5-0.8) solid solutions

et al. 2005

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The properties of AgCl 1 -x Br x ( x = 0.5-0.8) solid solutions prepared by the Bridgman-Stockbarger method are studied using a variety of techniques (x-ray diffraction, microstructural examination, chemical analysis, and x-ray microanalysis). The lattice parameter of the solid solutions is found to exhibit a negative deviation from additivity. The effects of composition and preparation conditions on the structural properties of the solid solutions are discussed. The structural characteristics of abrasively polished surfaces of the samples are shown to be influenced by the preparation conditions.

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Section: Methodsmentioning

confidence: 90%

“…Optical fibers produced by extrusion of AgCl 1 -x Br x crystals with x Ӎ 0.7 (composition corresponding to the minimum liquidus temperature) are known to possess better mechanical and optical properties compared to fibers fabricated from AgCl and AgBr [2,3].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and structural properties of AgCl1 - xBrx (x = 0.5-0.8) solid solutions

et al. 2005

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“…Polycrystalline fibers 500, 700, and 1000 µ m in diameter were produced by backward extrusion [3] at 180-190 ° C. The extrusion rate was 15 mm/h. Unclad fibers were prepared from KRS-13 crystals.…”

Section: Methodsmentioning

confidence: 99%

“…The high mechanical strength and flexibility of such fibers, good optical properties of AgCl and AgBr [1,2], and the ease of the manufacture of optical fibers from these compounds by hot extrusion [3] offer the possibility of using polycrystalline IR (PIR) fibers in developing various optical fiber devices.…”

Section: Introductionmentioning

confidence: 99%

Structure and properties of AgCl1 ? x Brx (x = 0.5?0.8) optical fibers

et al. 2005

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The properties of polycrystalline optical fibers produced by extruding crystals of AgCl 1 -x Br x ( x = 0.5-0.8) solid solutions are studied by optical microscopy, scanning electron microscopy, microstructural analysis, and x-ray microanalysis. The results demonstrate for the first time that the arrangement of polycrystalline regions and recrystallized single-crystal blocks 0.03-0.10 and 2-5 µ m in size, respectively, possesses three-or fourfold symmetry or a mirror plane m , depending on the crystallographic orientation of the parent crystal (cubic symmetry). The effect of the structural properties of the parent crystal on the properties of the fibers is discussed.

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“…Demand for the development of infrared optical waveguides to deliver C02 laser beams to a target, has led researchers to investigate two types of waveguides, the flexible metal [l,2,3] and the infrared fiber-optical [4,5] waveguides. There are often clear advantages to using a fiber optic waveguide for low power application, but for high-power applications metallic waveguides have proved to be the best choice.…”

Section: Introductionmentioning

confidence: 99%

DC-excited cw CO₂ metal waveguide laser

Al-Mashaabi¹

2000

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A novel design for a DC excited cw C02 metal waveguide laser has been developed in which a slotted hollow-cathode in a transverse discharge also doubles as a metal waveguide. This design has been implemented in a compact design that produces up to 1 watt of cw, 10.6 µm radiation. The discharge characteristics, laser gain and laser output has been studied as functions of various discharge parameters. The advatages of the new transverse discharge of the slotted hollow 2 cathode geometry include low voltage, positive impedence and high optical gain.Overall efficiency is comparable with those of conventional longitudinal C02 lasers. The output laser modes were very clean low order Gaussian modes. DC-EXCITED CW INTRODUCTIONDemand for the development of infrared optical waveguides to deliver C02 laser beams to a target, has led researchers to investigate two types of waveguides, the flexible metal [l,2,3] and the infrared fiber-optical [4,5] waveguides. There are often clear advantages to using a fiber optic waveguide for low power application, but for high-power applications metallic waveguides have proved to be the best choice.A metallic waveguide could be a hollow tube [1] or a concave strip [2]. In order to efficiently couple laser beams into either type of waveguide, Marhic [3] proposed a laser whose output modes match the waveguide modes. This is done there are practical differences between the two schemes. The glass tube laser suffers from very inefficient use of the gain medium. The second laser is more efficient but is more expensive because it requires a RF power supply, which complicates matters because it requires impedance matching between the RF power supply and the laser discharge which is hard to obtain. These problems may be 2 simultaneously eliminated by carefully designing a new type of waveguide discharge that is able to generate a relatively high gain medium using DC excitation.The focus of this thesis is to develop a novel design of high gain transversely DC excited metal waveguide laser. This new type of waveguide laser has been constructed and investigated. The design of this waveguide laser device is described in the next section of this chapter.In chapter II, a brief discussion of the molecular spectra and the excitation processes is presented. Understanding these processes is a prerequisite for finding the right discharge conditions for laser gain which demands knowing the role of each gas and their interactions in an electrcal discharge. Chapter III will introduce the low pressure glow discharge and finally focuses on the discharge characteristics of our slotted hollow-cathode waveguide.In chapter IV, the gain measurement, which is a necessery step in assessing the suitability of our new waveguide discharge for laser excitation and in obtaining the optimum discharge conditions for laser action, is presented. Next, the above amplifier is turned into a laser medium by placing it inside an optical resonator. In chapter V, The operation of this laser is studied by observing the transverse o...

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Polycrystalline fiber optical waveguides for infrared transmission

Cited by 8 publications

References 1 publication

Synthesis and structural properties of AgCl1 - xBrx (x = 0.5-0.8) solid solutions

Synthesis and structural properties of AgCl1 - xBrx (x = 0.5-0.8) solid solutions

Structure and properties of AgCl1 ? x Brx (x = 0.5?0.8) optical fibers

DC-excited cw CO₂ metal waveguide laser

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