Tunable Mid-Infrared Raman Soliton Generation From 2.80 to 3.17 μm Based on Fluorotellurite Fiber

Abstract

Tunable mid-infrared Raman soliton generation from 2.80 to 3.17 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\mu \text{m}$ </tex-math></inline-formula> based on fluorotellurite fiber is presented. The seed is a femtosecond mode-locked Er3+-doped ZBLAN fiber oscillator at 2.8 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\mu \text{m}$ </tex-math></inline-formula> . Feeding the pulses to an Er3+-doped ZBLAN fiber amplifier, the pulse average power can be boosted to 773 mW with the self-compressed width of 100 fs (estimated). Subsequently, launching the amplified pulses into an in-house high-nonlinearity fluorotellurite fiber, the pulses can be mostly red-shifted to 3.17 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\mu \text{m}$ </tex-math></inline-formula> with a conversion efficiency of 26% and an average power of 39 mW. The experimental results indicate that fluorotellurite fibers are superior nonlinear media for generation of tunable mid-infrared ultrashort pulses.