基于改进的化学气相沉积(MCVD)法结合溶液掺杂技术以及侧向研磨技术，实验制作出了一种D型双包层高浓度掺铒光敏光纤。为了同时实现光纤中的大模场直径和铒离子的高浓度掺杂，其纤芯采用了双层掺铒区结构，并对该样品光纤的基本参数及光敏特性进行了测试，其截止波长为1234.03 nm，模场直径约为12 μm，在1530 nm处的吸收系数为49.658 dB/m，上面刻写的均匀布拉格光纤光栅的透射深度为10 dB，对应的反射率为90%。测试结果表明，自制的D型双包层光纤具有很高的铒离子掺杂浓度和良好的光敏特性，能够为制作全光纤型高功率单模包层抽运光纤激光器提供一个很好的选择。

A novel D-shape high-concentration erbium-doped photosensitive double-clad fiber is manufactured experimentally by the combination of modified chemical vapor deposition (MCVD) process, solution doping technique and lateral grinding method. Large mode-field area and high-concentration erbium-ions doping can be achieved simultaneously in this fiber by adopting double-erbium doped regions in the core. The absorption coefficient of the homemade fiber at 1530 nm is 49.658 dB/m while the mode diameter is about 12 μm and the cutoff wavelength is 1234.03 nm. An uniform fiber Bragg grating with the transmission depth of 10 dB and the reflectivity of 90% at the wavelength of 1545.297 nm is written on this fiber successfully. The results show that this novel fiber can be a good choice for all-fiber high-power single-mode cladding pumping fiber laser.