Suppression of bend loss in writing of three-dimensional optical waveguides with femtosecond laser pulses

2018/02/08 by Liu, Zhengming, Liao, Yang, Fang, Zhiwei +2
#Applied Physics (physics.app-ph) #FOS: Physical sciences

paper · doi:10.48550/arxiv.1802.03461

Abstract

We provide a solution toward compact and low-loss three dimensional (3D) photonic circuits by femtosecond laser direct writing of 3D waveguides in fused silica. We suppress the bend loss by sandwiching the waveguide between a pair of walls formed by internal modification of glass. Our method allows to reduce the bend loss of a curved waveguide with a bending radius of 15 mm by more than one order of magnitude.

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