| 研究概要 |
Multiple Raman peak properties in a 130 m tellurite fiber was investigated using different pump sources. When a nanosecond laser operated at ～1545 nm was used as the pump source, second-order Raman shift with multiple Raman peaks was observed. Especially for the first-order Raman shift, six obvious Raman peaks were obtained. To the best of our knowledge, this was the first demonstration of multiple Raman peaks in tellurite fibers. When a picosecond laser operated at ～1064 nm was used as the pump source, second-order Raman shift with only dual Raman peaks was observed, which can be applied to tunable lasers and amplifiers. Furthermore, the influence of fiber length on the evolution of Raman shift was investigated using a 2.5 m tellurite fiber. The reduction in fiber length led to a lower Raman gain, which induced only dual Raman peaks in each order Raman shift.
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