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Schematic of the three laser systems. denotes diameter of smaller airholes. Waveguide has the same hole radius as the LDW cavity, waveguide has the smaller airholes of 210 nm, and waveguide has the same structure as the LDW area except the airholes adjacent to the line defect. The diameter of the adjacent airholes is chirped from 260 to 190 nm. The dotted red circles indicate the location of pump spots in the experiment.
Scanning electron microscopy image of the laser system of chirped waveguide butt joint LDW laser. The airholes enclosed by dashed line is the chirped area.
Near field pattern of laser excitation and output performance from the laser system .
(a) characteristic at peak power observed for the laser system . (b) Lasing spectrum at peak power observed for the laser system .
The vertical ( direction) magnetic-field distribution in the laser system (upper) and (lower).
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