Abstract
We have demonstrated a 45 μm core diameter Neodymium-doped all-solid silicate glass photonic crystal fiber laser with a single mode laser output. The structure parameters and modes information of the fiber are both demonstrated by theoretical calculations using Finite Difference Time Domain (FDTD) method and experimental measurements. Maximum 0.8 W output power limited by launched pump power has been generated in 1064 nm with laser beam quality factor M2 1.18.
Highlights
Refractive index of N0312 equal to background glass G2 as far as possible
The difference of refractive index between the background material G2 and core material is about 0.0001 at 1064nm, which was very suitable for large mode area photonic crystal fiber
In order to qualify the quality of the beam emitted by an inherently slightly multimode fiber, we used the overlap factors (OF)[17,18] of the guided modes in the theoretical calculation
Summary
Refractive index of N0312 equal to background glass G2 as far as possible. The rare-earth doped glass N0312 with active dopant level of 1.2 wt. %. %. The refractive indexes of the two kinds cladding glasses G1 and G2 were 1.50672 and 1.51230 in 1064 nm, respectively. The difference of refractive index between the background material G2 and core material is about 0.0001 at 1064nm, which was very suitable for large mode area photonic crystal fiber.
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