Upconversion pumped thulium-doped fluoride fiber amplifier and laser operating at 1.47 μm

TLDR

The study investigates a 1.064 µm upconversion‑pumped thulium‑doped fluoride fiber amplifier and laser operating at 1.47 µm. Both devices use the self‑terminating 3F4→3H4 transition of trivalent thulium ions. The amplifier achieves over 10 dB gain (1.44–1.51 µm) with low noise, while the laser delivers >100 mW output and 59 % slope efficiency at 1.47 µm, making the system attractive for optical communications. No additional information provided.

Abstract

A 1.064-/spl mu/m band upconversion pumped Tm/sup 3+/-doped fluoride fiber amplifier and a laser both operating at 1.47 /spl mu/m are investigated in detail. The two devices are based on the /sup 3/F/sub 4//spl rarr//sup 3/H/sub 4/ transition in a trivalent thulium ion, which is a self-terminating system. When pumped at 1.064 /spl mu/m, the amplifier has a gain of over 10 dB from 1.44 to 1.51 /spl mu/m and a low-noise characteristic. Also, the fiber laser generates a high-output power of over 100 mW with a slope efficiency of 59% at around 1.47 /spl mu/m. These levels of performance will be important for optical communication systems. >