High power laser coupling from solid-core fibers to anti-resonant hollow-core fibers by fiber tapering technology

摘要

Fiber tapering technology has been used to realize low-loss coupling from solid-core fibers to anti-resonant hollow-core fibers (AR-HCFs) at low-power level, by inserting the tapered solid-core fibers into the hollow-core of AR-HCFs. Here, we have demonstrated the high-power coupling capacity of this way. For ice-cream type AR-HCF, a transmission efficiency of ～47% is achieved with injected 1080 run laser power of ～90 W in a ～2 m HCF; for nodeless type AR-HCF, a transmission efficiency of ～40% is achieved with injected 1550 nm laser power of ～32 W in a ～2 m HCF. The output mode field with good beam quality shows the mode filtering characteristics of AR-HCFs.