An overview of the modified chemical vapor deposition (MCVD) process and performance

  title={An overview of the modified chemical vapor deposition (MCVD) process and performance},
  author={Suzanne R. Nagel and John Burnette Macchesney and Kenneth Lee Walker},
  journal={IEEE Journal of Quantum Electronics},
This paper reviews the MCVD process, with special emphasis on fiber design and material choices, understanding of mechanisms involved in the process, process improvements, and performance. 
The influence of codopants and fabrication conditions on germanium defects in optical fiber preforms
The GeE' defect concentration in MCVD germanosilicate preforms, as measured by cathodoluminescence profiles, is dramatically reduced by the addition of phosphorus as a codopant. The GeE'
Doping of optical fiber preforms via porous silica layer infiltration with salt solutions
A process is described for reproducible deposition of porous layers uniform along the preform axis, and the effect of the nature of the solvent on the infiltration of salt solutions into the porous
Advances in optical fibers fabricated with granulated silica
  • J. Scheuner, A. Heidt, +6 authors V. Romano
  • Computer Science, Materials Science
    2017 Optical Fiber Communications Conference and Exhibition (OFC)
  • 2017
The sol-gel based granulated silica preform fabrication method is presented as a versatile "rapid prototyping" platform for specialty optical fiber production, enabling arbitrary geometries, large
Experimental Study of SiO2 Soot Deposition using the Outside Vapor Deposition Method
The deposition of pure silica layers using the Outside Vapor Deposition method has been studied. The experimental study focuses on some fabrication parameters that have to be adjusted in order to
Tm-Yb Doped Optical Fiber Performance with Variation of Host-Glass Composition
The fabrication process of Thulium-Ytterbium doped optical fiber comprising different host glass through the Modified Chemical Vapor Deposition (MCVD) coupled with solution doping technique is
A study of reaction mechanisms in plasmas related to glass-fiber production
• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published
Photosensitivity, chemical composition gratings and optical fiber based components
The different topics of this thesis include high-temperaturestable fiber Bragg gratings, photosensitivity and fiber basedcomponents. Fiber Bragg gratings (FBG) are wavelength dispersiverefractive i
Formation of Pyrogenic Silica: Spectroscopic and Quantum Chemical Insight
This article describes the genesis of amorphous silica under high-heat conditions from SiO2 molecules through protoparticles, primary particles, and aggregates to agglomerates using vibrational
Glass and Process Development for the Next Generation of Optical Fibers: A Review
Applications involving optical fibers have grown considerably in recent years with intense levels of research having been focused on the development of not only new generations of optical fiber
Highly Tm Doped Silica Optical Preform by MCVD - Chelate Vapor Delivery (Soot-Dopant Stepwise Technique)
This paper presents the progress in the fabrication of highly doped thulium silica fiber. As much as 5.3 wt. % Tm alongside 7.1 wt. % Al (co-dopant) were incorporated into silica preform. The preform


Thermophoresis: The mass transfer mechanism in modified chemical vapor deposition
The mass transfer of particulates of silica and germania is characteristic of the MCVD process for preparing optical fiber preforms. Here, after considering a number of alternatives, it is suggested
Fabrication of long fibers by an improved chemical vapor deposition method (HCVD method)
An improved (CVD) method was developed to fabricate long fibers. He gas mixed with O2 and raw material vapors were introduced into the CVD gas system to increase the deposition rate. This produced a
Fiber drawing, coating, and jacketing
The fiber drawing and coating process impacts strongly on the transmission and strength properties of optical fibers. Current practices which lead to realization of optimum fiber properties are
The preparation of optical waveguide preforms by plasma deposition
Optical fiber preforms are prepared by a technique similar to the modified CVD process, except that an RF plasma is used. Optical losses as low as 6.5 dB/km at 1.06 μm were achieved. Higher reaction
Improved chemical vapour deposition method for long-length optical fibre
The deformation of the supporting tube during the c.v.d. process for optical fibre fabrication is completely suppressed by controlling the internal pressure of the tube. A 14 km length single-mode
Thermophoretic Deposition of Small Particles in the Modified Chemical Vapor Deposition (MCVD) Process
Thermophoresis is conclusively established as the particulate deposition mechanism in the MCVD process by comparing experimental measurements and quantitative theoretical predictions. The deposition
Materials and processes for fiber preform fabrication—Vapor-phase axial deposition
The vapor-phase axial deposition (VAD) process was developed to realize continuous fabrication of high-silica fiber preforms. This process could be used to fabricate various kinds of optical fibers
Partition of Hydrogen in the Modified Chemical Vapor Deposition Process
In the modified chemical vapor deposition (MCVD) process for making glass fibers, most of the hydrogen coming into the reaction from hydrogen-bearing impurities in the starting materials is not
Fabrication of optical waveguides by the outside vapor deposition process
The outside vapor deposition process (OVD) represents one of the principle vapor deposition methods used to make glass fiber optical waveguides [1], [2]. In this brief review, each of the basic
Effect of deposition rate on spectral loss of GeO2-P2O5-SiO2 graded index fibres
Low loss, low OH content 0.23 n.a. graded index germanium phosphosilicate fibres have been fabricated using the m.c.v.d. process at rates up to 0.34 g/min with deposited layer thicknesses up to 16