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Opto-electronics

, Volume 5, Issue 4, pp 323–334 | Cite as

An improved technique for the measurement of low optical absorption losses in bulk glass

  • K. I. White
  • J. E. Midwinter
Glasses and Fibres

Abstract

A thin rod sample is thermally clamped at both ends to provide a rigid mounting and a thermal short-circuit for heating effects associated with surface losses. The ends are index matched with liquid to minimize sample preparation. A laser beam is focused through the sample and the temperature rise due to the absorbed energy is monitored at its centre. Sensitivity is limited to a few dB km−1 optical loss with a laser of 100 mW power. The theory is discussed in detail for this particular geometry and experimental verification presented.

Keywords

Sample Preparation Laser Beam Communication Network Temperature Rise Optical Absorption 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman and Hall Ltd 1975

Authors and Affiliations

  • K. I. White
    • 1
  • J. E. Midwinter
    • 1
  1. 1.Post Office Research DepartmentIpswichUK

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