Rare-earth-doped glass fibre lasers and amplifiers
At Advances in Amorphous State Chemistry in Topical Issues in Glass, United Kingdom.
When grouped with rare-earths, glass optical fibres provide the ideal amplifier and laser medium. Amplifiers exhibiting gains in excess of 50dB can be made with a noise figure close to the quantum limit. In addition, fibre lasers have been demonstrated using various rare-earths which give emission wavelengths spanning the region 400nm to 3.4µm. This exciting new technology is reviewed with particular reference to the advantages which can be obtained by adopting new glass hosts, such as germanates, phosphates, halides and chalcogenides
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