Fabrication and amplified spontaneous emission spectrum of Er 3+-doped tellurite glass fiber with D-shape cladding

Abstract

Tellurite glass is proposed as a host for broadband erbium-doped fiber amplifiers because of their excellent optical and chemical properties. A single-mode Er 3+-doped tellurite glass fiber with D-shape cladding was fabricated in this work. The characterization of amplified spontaneous emission (ASE) from this newly fabricated Er 3+-doped tellurite fibers are exhibited. When pumped at 980 nm, a very broad erbium ASE nearly 150 nm around 1.53 μm is observed. The changes in ASE with regard to fiber lengths and pumping power were measured and discussed. The output of 2 mW from Er 3+-doped tellurite fiber ASE source was obtained under the pump power of 660 mW. The broad 1.53 μm emission of Er 3+ in tellurite glass fiber can be used as host material for potential broadband optical amplifier and tunable fiber lasers.