Abstract
We report on fabrication of tubular optical waveguides buried in ZBLAN glass based on transverse femtosecond laser direct writing. Irradiation in ZBLAN with focused femtosecond laser pulses leads to decrease of refractive index in the modified region. Tubular optical waveguides of variable mode areas are fabricated by forming the four sides of the cladding with slit-shaped femtosecond laser pulses, ensuring single mode waveguiding with a mode field dimension as small as ∼4 μm.
| Original language | English |
|---|---|
| Article number | 28790 |
| Journal | Scientific Reports |
| Volume | 6 |
| DOIs | |
| State | Published - 27 Jun 2016 |
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