R.S. Deol

Fabrication and optical properties of lead‐germanate glasses and a new class of optical fibers doped with Tm3+

In this article we present a study of a new class of optical fibers based on lead germanate glass. The maximum vibrational frequency of this glass is intermediate between silica and zirconium barium lanthanum aluminum fluoride glass, causing a beneficial change in nonradiative decay and therefore quantum efficiency for particular laser transitions. Fabrication of high-strength, low-loss fibers of this glass has been achieved by modification of the composition to produce optimal physical properties for fiber drawing, while retaining the useful vibrational properties of the original PbGeO2 glass. Measurements of both the thermal and optical properties are described. The fibers produced are ideal for many applications in fiber devices.

Improved fluoride glasses for 1.3 μm optical amplifiers

Abstract Preliminary materials results are reported of a study to develop novel fluoride glasses exhibiting maximum phonon energies lower than those of ZBLAN with the objective of realising an efficient optical amplifier for the coveted 1.3 μm wavelength domain. Pertinent material attributes including peak phonon energy, 1 G 4 lifetimes and thermal properties are reported for each glass host.

High performance acousto-optic chalcogenide glass based on Ga2S3-La2S3 systems

Chalcogenide glass systems based on Ga2S3-La2S3 (GLS glass), have been found to exhibit relatively high acousto-optic figures of merit. low acoustic loss and high acoustic velocity. These properties of the GLS glass combined with its transparency both in the visible and the infrared (0.5-10 µm), nontoxity, high softening temperature (Tg = 561 °C), ease of fabrication, optical quality, chemical stability, and isotropic properties, make it attractive for acousto-optic device applications.

Pr3+-Doped Mixed Halide Glasses for 1.3 µm Fibre Amplifiers

Using experimental measurements of cross-sections and a 1G4 lifetime of 315µs, we have characterised the expected performance of a Pr3+-doped mixed halide fibre amplifier for operation at 1.3µm. Our model predicts a small-signal gain of 20dB for 75mW of pump.