Effect of power scale of 974 and 633 nm lasers on the induced loss at 633 nm of Yb3+/Al3+ co-doped silica fiber
Induced loss at 633 nm is tested in Yb3+/Al3+ co-doped silica fiber by a core pumped with a 974 nm laser and probed with a 633 nm laser. The fiber is prepared by the modified chemical vapor deposition method combined with solution doping. Different power scales of pump light and probe light are used in the tests. It is found that there is a dynamic equilibrium between photobleaching induced by 633 nm probe light and photodarkening (PD) induced by 974 nm pump light. For the first time to our knowledge, the effect of 633 nm probe laser power on an induced loss test of Yb3+/Al3+ co-doped silica fiber is studied quantitatively. It suggests that as long as the 633 nm probe light power is less than 0.2 mW, the induced loss is mainly contributed by the PD effect of pumping light, and the deviation of induced loss is less than 5%.
基金项目：This work was supported by the Young Scientists Fund of the National Natural Science Foundation of China (No. 61405215), the Youth Innovation Promotion Association, and the Special Program for Advanced Electronic Materials of the Ministry of Science and Technology, China (No. 2016YFB0402201).
Chongyun Shao：Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, ChinaUniversity of Chinese Academy of Sciences, Beijing 100049, China
Fengguang Lou：Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Meng Wang：Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Chunlei Yu：Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
Suya Feng：Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, Chinae-mail: firstname.lastname@example.org
Lili Hu：Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
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Fenghou Xie, Chongyun Shao, Fengguang Lou, Meng Wang, Chunlei Yu, Suya Feng, Lili Hu, "Effect of power scale of 974 and 633 nm lasers on the induced loss at 633 nm of Yb3+/Al3+ co-doped silica fiber," Chinese Optics Letters 16(1), 010603 (2018)
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