Birefringence suppression of UV-induced refractive index with grooves in silica-based planar lightwave circuits

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Birefringence suppression of UV-induced refractive index with grooves in silica-based planar lightwave circuits

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An effective method for suppressing the birefringence of a UV-induced refractive index change is demonstrated for phase trimming of waveguides in planar lightwave circuits. By employing grooves on both sides of the waveguide to control the UV-induced strain, a significant reduction is achieved from 1.46×10−4 to 0.11×10−4 in the UV-induced birefringence for a π phase shift averaged between the TE and TM modes in a 2 mm-long waveguide.

Inspec keywords: optical planar waveguides; birefringence; refractive index

Other keywords: birefringence suppression; UV-induced strain; 2 mm; optical planar waveguides; phase trimming; silica-based planar lightwave circuits; UV-induced refractive index; optical fabrication

Subjects: Optical waveguides and couplers; Optical waveguides; Integrated optics; Integrated optics

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