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Fibers 2013, 1(3), 93-100; doi:10.3390/fib1030093
Article

Characteristics and Laser Performance of Yb3+-Doped Silica Large Mode Area Fibers Prepared by Sol–Gel Method

1,2,* , 1,2,†
,
1,†
,
1,†
,
1,†
,
1,†
,
1,†
 and
1,†
1 Key Laboratory of Materials for High Power Laser, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China 2 Graduate School of Chinese Academy of Sciences, Beijing 100039, China These authors contributed equally to this work.
* Author to whom correspondence should be addressed.
Received: 30 October 2013 / Revised: 29 November 2013 / Accepted: 4 December 2013 / Published: 10 December 2013
(This article belongs to the Special Issue Advances on Optical Fibers)
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Abstract

Large-size 0.1 Yb2O3–1.0 Al2O3–98.9 SiO2 (mol%) core glass was prepared by the sol–gel method. Its optical properties were evaluated. Both large mode area double cladding fiber (LMA DCF) with core diameter of 48 µm and large mode area photonic crystal fiber (LMA PCF) with core diameter of 90 µm were prepared from this core glass. Transmission loss at 1200 nm is 0.41 dB/m. Refractive index fluctuation is less than 2 × 10−4. Pumped by 976 nm laser diode LD pigtailed with silica fiber (NA 0.22), the slope efficiency of 54% and “light-to-light” conversion efficiency of 51% were realized in large mode area double cladding fiber, and 81 W laser power with a slope efficiency of 70.8% was achieved in the corresponding large mode area photonic crystal fiber.
Keywords: fiber laser; sol–gel method; Yb3+-doped silica glass; LMA DCF; LMA PCF fiber laser; sol–gel method; Yb3+-doped silica glass; LMA DCF; LMA PCF
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Wang, S.; Lou, F.; Wang, M.; Yu, C.; Feng, S.; Zhou, Q.; Chen, D.; Hu, L. Characteristics and Laser Performance of Yb3+-Doped Silica Large Mode Area Fibers Prepared by Sol–Gel Method. Fibers 2013, 1, 93-100.

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