Modelocked Lasers using Erbium-Project Staff doped Glass Waveguide Amplifiers (original) (raw)

Detailed design analysis of erbium-doped fiber amplifiers

Photonics Technology …, 1991

INTRODUCTION HE erbium-doped fiber amplifier has much potential as a T high-gain optical amplifier in optical communication sys- ... MODEL The model for the EDFA, used in the analysis, assumes that the Er3+-ions acts as a 3-level laser system when pump-ing at ...

Erbium-doped silicate glasses for integrated optical amplifiers and lasers

Journal of Non-crystalline Solids, 2004

Soda-lime silicate glasses doped with different percentages of Er- and Yb-oxides were produced by melting, and both planar and channel waveguides were fabricated by ion exchange. Pure potassium and diluted silver nitrate melts were used. The optical and spectroscopic properties of the various waveguides were investigated, and the results are reported here. The optical parameters such as refractive index, diffusion depth and number of modes were measured by dark-line spectroscopy. Absorption and fluorescence spectra were also recorded. Channel waveguides were produced by photolithographic patterning, using Al or Ti masking films. Particular attention was focused on two aspects: (a) the study of the spectroscopic properties as a function of Er3+/Yb3+ concentration; and (b) the shaping of the waveguide index profile by thermal annealing treatments. By using proper process parameters, net optical gain in the 1532–1555 nm band was measured in different samples, both in K+- and in Ag+-exchanged channel waveguides, upon pumping at 980 nm.

Integrated optical amplifiers and microspherical lasers based on erbium-doped oxide glasses

Optical Materials, 2005

Er3+-doped glasses have been a subject of great interest in the recent years for their application in the areas of guided wave optical amplifiers and lasers. Oxide–glass matrices, in particular, offer the advantage of relatively simple fabrication processes—both for bulk glasses and optical fibers—and have demonstrated quite good properties in the 1.5 μm wavelength band. Here we present some results we have obtained in the development of different silica-based glasses and in their application to the production of integrated optical amplifiers and microspherical lasers. As to the former application, two classes of silica glasses have been produced and investigated, namely a melted soda-lime–alumino-silicate glass and a sol–gel silica–hafnia glass. Both of them exhibit a wide emission bandwidth and seem quite promising for broadband optical amplifiers. We also demonstrated low-threshold microlasers, based on whispering gallery mode spherical resonators, fabricated in different oxide glasses.