Abstract
The purpose of this paper is to examine the potential of three binary borate glasses; namely PbOB 2O 3, K 2OB 2O 3 and Li 2OB 2O 3 as candidates for fabrication of low optical loss and low cost fiber-glass wave-guides. The importance of ultrasonic measurements as the first step in a systematic search for a glass with low optical loss, is discussed. Results of ultrasonic measurements of PbOB 2O 3 system are then presented. Using these results and the published results for the K 2OB 2O 3 and Li 2OB 2O 3 systems, estimates of the magnitude of density fluctuations as a function of composition have been made for each system. Comparison with the previously published results on the K 2OSiO 2 system suggests that out of the three systems chosen, only 50 mole % Li 2O50 mole % B 2O 3 glass is a likely candidate for the production of low optical loss glass fibers.
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