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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 46, Iss. 32 — Nov. 10, 2007
  • pp: 7889–7891

Thermo-optic coefficient of barium gallogermanate glass

Shyam S. Bayya, Geoffrey D. Chin, Jasbinder S. Sanghera, Ishwar D. Aggarwal, and John A. Detrio  »View Author Affiliations


Applied Optics, Vol. 46, Issue 32, pp. 7889-7891 (2007)
http://dx.doi.org/10.1364/AO.46.007889


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Abstract

Barium gallogermanate (BGG) glasses are currently being explored as a viable low cost material for numerous U.S. defense and commercial visible-infrared window applications. These glasses are transparent from 0.4 μ m to beyond 5.0 μ m and can be easily made in large optics and complex shapes with high index homogeneity. For high-energy laser (HEL) applications, knowledge of the thermo-optic coefficient ( d n / d T ) of the window material is important in determining the optical path distortion. The d n / d T measurements were made on BGG glass at 633 and 3390   nm and compared with the values for multispectral ZnS. The dn∕dT for BGG glass was 1 5 the value for multispectral ZnS, giving BGG glass a clear advantage for HEL applications.

© 2007 Optical Society of America

OCIS Codes
(160.2750) Materials : Glass and other amorphous materials
(160.4670) Materials : Optical materials
(160.4760) Materials : Optical properties

ToC Category:
Materials

History
Original Manuscript: August 13, 2007
Manuscript Accepted: September 20, 2007
Published: November 8, 2007

Citation
Shyam S. Bayya, Geoffrey D. Chin, Jasbinder S. Sanghera, Ishwar D. Aggarwal, and John A. Detrio, "Thermo-optic coefficient of barium gallogermanate glass," Appl. Opt. 46, 7889-7891 (2007)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-46-32-7889


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References

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