高效率掺Tm3+双包层光纤及光纤激光器的研制

摘要

掺Tm3+光纤激光器有着广泛的应用前景,而掺Tm3+光纤是其核心与关键.本文采用改进的化学汽相沉积(MCVD)工艺和气相液相复合掺杂技术,在MCVD机车上实现了掺Tm3+石英光纤预制棒的制备,并制备了掺Tm3+石英双包层光纤(芯包比为10/125).利用上述光纤搭建直腔型全光纤激光器,在波长为793 nm的LD抽运下,获得激光光谱中心波长为2002 nm,最大的激光输出功率30.7 W,光纤斜率效率为59.32%.%The Tm3+-doped fiber is the key of Tm3+-doped fiber laser, which has broad application prospects. In this paper, the silica-based Tm3+-doped fiber preform is manufactured by gas-solution co-doping method in MCVD(modified chemical vapour deposition) and the Tm3+-doped double-cladding fiber is also achieved, the core and cladding diameters of which are 10 µm and 125 µm respectively. We prepare the Tm3+ all-fiber laser using the Tm3+-doped fiber and when the laser is pumped by a 793 nm laser diode, the center wavelength is 2002 nm, maximum output is 31.7 W, and the slope efficiency of the fiber is 59.32%.