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Title: Development of improved laser glasses which can be melted on a commercial scale. First quarterly progress report, September 15, 1976--December 31, 1976

Abstract

A laboratory furnace to melt fluoride glasses under controlled atmosphere conditions with stirring has been designed. In addition, initial fluorophosphate glass compositions have been selected, melted, and evaluated. Glass quality of many of these melts has been encouraging. The fluorophosphate glass with the best properties found to date has an n/sub D/ of 1.43 and an Abbe value of about 90.

Authors:
;
Publication Date:
Research Org.:
Owens-Illinois, Inc., Toledo, OH (USA)
OSTI Identifier:
7213389
Report Number(s):
COO-4080-2
DOE Contract Number:
EY-76-C-02-4080
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; GLASS; MELTING; LASERS; FLUORIDES; FURNACES; PHOSPHATES; RESEARCH PROGRAMS; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; PHOSPHORUS COMPOUNDS; 360600* - Other Materials; 420300 - Engineering- Lasers- (-1989)

Citation Formats

Vergano, P.J., and Rapp, C.F.. Development of improved laser glasses which can be melted on a commercial scale. First quarterly progress report, September 15, 1976--December 31, 1976. United States: N. p., 1977. Web. doi:10.2172/7213389.
Vergano, P.J., & Rapp, C.F.. Development of improved laser glasses which can be melted on a commercial scale. First quarterly progress report, September 15, 1976--December 31, 1976. United States. doi:10.2172/7213389.
Vergano, P.J., and Rapp, C.F.. Sat . "Development of improved laser glasses which can be melted on a commercial scale. First quarterly progress report, September 15, 1976--December 31, 1976". United States. doi:10.2172/7213389. https://www.osti.gov/servlets/purl/7213389.
@article{osti_7213389,
title = {Development of improved laser glasses which can be melted on a commercial scale. First quarterly progress report, September 15, 1976--December 31, 1976},
author = {Vergano, P.J. and Rapp, C.F.},
abstractNote = {A laboratory furnace to melt fluoride glasses under controlled atmosphere conditions with stirring has been designed. In addition, initial fluorophosphate glass compositions have been selected, melted, and evaluated. Glass quality of many of these melts has been encouraging. The fluorophosphate glass with the best properties found to date has an n/sub D/ of 1.43 and an Abbe value of about 90.},
doi = {10.2172/7213389},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 1977},
month = {Sat Jan 01 00:00:00 EST 1977}
}

Technical Report:

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  • Large neodymium doped glass laser systems are presently being built for nuclear fusion research. However, the power which can be generated by these systems is generally limited by self focusing in the laser glass. This study was undertaken to develop laser glasses with a minimum nonlinear refractive index which would allow the generation of higher powers in these laser systems. Various fluorophosphate glass forming systems were investigated in order to develop laser glasses with ''optimum'' properties (low n/sub 2/, medium sigma, long tau, highly stable). In these fluorophosphate systems, the regions of glass formation were defined and glass composition-property correlationmore » equations were derived which related the various properties (n/sub D/, n/sub 2/, sigma, the Nd/sup 3 +/ peak lambda, ..delta..lambda, effective ..delta..lambda, sigma and tau radiative) to the glass composition. Specific glass compositions were developed which had nonlinear refractive indices of about /sup 1///sub 3/ those of commercial silicate laser glasses but had comparable spectroscopic properties (i.e., sigma). These glasses were sufficiently stable to cast single pieces of glass weighing in excess of 50 lbs.« less
  • This program was begun with the realization that fluorophosphate glass offered the possibiliy of low n/sub 2/ laser glass which would be suitable for use in the Lawrence Livermore NOVA system. The main objectives of the program were as follows: (1) the design of a fluorophosphate laser glass having the necessary properties for use in LLL's NOVA System; (2) the development of optimized processes for preparing fluorophosphate laser disks of the size needed for the NOVA System. Since September 30, 1977, the principal effort in the project has been directed toward the optimization of methods to prepare the fluorophosphate glassmore » with the necessary optical, physical, and chemical properties. This report will review both the work prior to October 1, 1977 and the work following that date.« less
  • The progress made during the second three-month period of the program to develop low n/sub 2/ fluorophosphate laser glasses is reported. This report covers the time period from January 1, 1977 to March 31, 1977. The most significant progress made during this time was: (1) the completion of construction of the fluoride melting furnace; (2) the identification of the alkaline earth fluoride-AlF/sub 3/-Al(PO/sub 3/)/sub 3/ system as being that which shows the most promise for producing glasses which meet the program objectives; and (3) the production of several glasses which meet or nearly meet the program's objectives.
  • Within the commercial sector, oil and natural gas are the predominant fuels used to meet the space-heating needs of schools, office buildings, apartment complexes, and other similar structures. In general, these buildings require firing rates of 1 to 10 million Btu/hr. The objective of this program is to demonstrate the technical and economic viability of a coal-fired combustion system for this sector. The commercial-scale coal-water slurry (CWS)-fired space heating system will be a scale-up of a CWS-fired residential warm-air heating system developed by Tecogen under contract to the Department of Energy, Pittsburgh Energy Technology Center. This system included a patentedmore » nonslagging combustor known as IRIS, for Inertial Reactor with Internal Separation. This combustion technology, which has demonstrated high combustion efficiency using CWS fuels at input rates of 100,000 Btu/hr, will be scaled to operate at 2 to 5 millon Btu/hr. Along with the necessary fuel storage and delivery, heat recovery, and control equipment, the system will include pollution control devices to meet targeted values of NO{sub x}, S0{sub 2}, and particulate emissions. In general, the system will be designed to match the reliability, safety, turndown, and ignition performance of gas or oil-fired systems.« less
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