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设计了一种以新型两级集成光学声光可调谐滤波器(IAOTF)为调谐元件的环形腔单偏振输出可调谐掺铒光纤激光器,它具有结构简单、调谐方便、调谐速度快和调谐范围大的优点。在对该集成光学声光可调谐滤波器滤波特性进行分析的基础上,在忽略放大的自发辐射(ASE)和激发态吸收情况下,对该激光器的特性参量如线宽、输出功率、斜率效率、阈值抽运功率等进行了分析。当抽运功率为100 mW,射频为175 MHz时,激光器输出中心波长为1550 nm,最大输出功率约6.34 mW,斜率效率为7.19%,半峰全宽(FWHM)为0.1 nm。当声波频率每改变0.1 MHz时,激光器输出中心波长改变约为0.88 nm,由于集成光学声光可调谐滤波器的滤波范围很大(当声波频率变化20 MHz时,滤波范围为180 nm),所以激光器的调谐范围仅取决于掺铒光纤的增益带宽。
A tunable erbium-doped fiber laser with a new two-stage integrated optical acousto-optic tunable filter (IAOTF) is designed as a ring resonator. The tunable erbium-doped fiber laser has the advantages of simple structure, convenient tuning, fast tuning and large tuning range The advantages. Based on the analysis of the filtering characteristics of the integrated optical acousto-optic tunable filter, ignoring the amplified spontaneous emission (ASE) and the excited state absorption, the characteristic parameters of the laser such as linewidth, output power, slope efficiency , Threshold pumping power were analyzed. When the pumping power is 100 mW and the radio frequency is 175 MHz, the laser output center wavelength is 1550 nm, the maximum output power is about 6.34 mW, the slope efficiency is 7.19% and the full width at half maximum (FWHM) is 0.1 nm. The wavelength of the laser output center changes about 0.88 nm for each 0.1 MHz change in acoustic frequency, since the integrated optical acousto-optic tunable filter has a large filter range (180 nm for a 20 MHz frequency change) The tuning range of the laser depends only on the gain bandwidth of the erbium-doped fiber.