[17p-B403-1~17] 3.5 Laser system and materials

[17p-B403-2] Dual-wavelength-pumped Tm³⁺:ZBLAN fiber MOPA at 813 nm

〇Eiji Kajikawa¹, Takashi Kubo¹, Yu-ichi Takeuchi¹, Mitsuru Musya¹, Kazuhiko Ogawa² (1.ILS/UEC, 2.FiberLabs Inc.)

Keywords:fiber amplifier, fluoride fiber, 813 nm

We have developed a fiber amplifier at 813 nm by using Tm³⁺-doped ZBLAN fiber. Tm³⁺-doped ZBLAN fiber is up-conversion-pumped by using a 1050 nm-Yb fiber laser and a 1220 nm-Raman fiber laser, and higher slope efficiensy is obtained compared with 1064 nm single frequency pumping. A fluorophosphate fiber is spliced with end-facet of ZBLAN fiber, which will improve the stable long-term operation of the high power MOPA system.