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. 

A High Temperature Sol-Gel Process for Glass Formation: Aerosol Doping in Modified Chemical Vapor Deposition

The combustion of an aerosol of organo-metallic precursors has led to a new process for both amorphous and ceramic oxide synthesis. This is analogous to a high temperature sol-gel reaction, and low

Laser enhancement of thermophoretic deposition processes

Axial CO 2 laser radiation has been shown to have a significant influence in modifying the deposition of silicon dioxide in the modified chemical vapor deposition (MCVD) fiber preform process.

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'

Nonsymmetrical modified chemical vapor deposition (N-MCVD) process (optical fibres)

A novel, simple fabrication method of circularly and axially nonsymmetrical MCVD layers is proposed. The thermophoretic mechanism is regulated by means of two linear heaters and coolers, respectively

The effect of sintering dopant incorporation in modified chemical vapor deposition

To determine the role of the diffusion of dopant (phosphorus, germanium, and fluorine) into silica particles and through the voids of porous soot during sintering, initially uniform soot layers are

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

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

Study of incorporation efficiency of different precursor salts in fabrication of rare‐earth doped optical fibers

A comparative study on the influence of different precursor salts of Er and Al for fabrication of rare‐earth‐doped optical fibers by modified chemical vapor deposition‐solution doping is presented.



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