@unpublished{Sun:2022,
author = {Sun, B and Morozko, F and Salter, PS and Moser, S and Pong, Z and Patel, RB and Walmsley, IA and Hazan, A and Barré, N and Jesacher, A and Fells, J and Katiyi, A and Novitsky, A and Karabchevsky, A and Booth, MJ},
publisher = {ArXiv},
title = {On-chip beam rotators, polarizers and adiabatic mode converters through low-loss waveguides with variable cross-sections},
url = {http://arxiv.org/abs/2112.02688v2},
year = {2022}
}
TY - UNPB
AB - Photonics integrated circuitry would benefit considerably from the ability toarbitrarily control waveguide cross-sections with high precision and low loss,in order to provide more degrees of freedom in manipulating propagating light.Here, we report on a new optical-fibres-compatible glass waveguide byfemtosecond laser writing, namely spherical phase induced multi-core waveguide(SPIM-WG), which addresses this challenging task with three dimensional on-chiplight control. Precise deformation of cross-sections is achievable along thewaveguide, with shapes and sizes finely controllable of high resolution in bothhorizontal and vertical transversal directions. We observed that thesewaveguides have high refractive index contrast of 0.017, low propagation lossof 0.14 dB/cm, and very low coupling loss of 0.19 dB coupled from a single modefibre. SPIM-WG devices were easily fabricated that were able to perform on-chipbeam rotation through varying angles, or manipulate polarization state ofpropagating light for target wavelengths. We also demonstrated SPIM-WG modeconverters that provide arbitrary adiabatic mode conversion with highefficiency between symmetric and asymmetric non-uniform modes; examples includecircular, elliptical modes and asymmetric modes from ppKTP waveguides which aregenerally applied in frequency conversion and quantum light sources. Createdinside optical glass, these waveguides and devices have the capability tooperate across ultra-broad bands from visible to infrared wavelengths. Thecompatibility with optical fibre also paves the way toward packaged photonicintegrated circuitry, which usually needs input and output fibre connections.
AU - Sun,B
AU - Morozko,F
AU - Salter,PS
AU - Moser,S
AU - Pong,Z
AU - Patel,RB
AU - Walmsley,IA
AU - Hazan,A
AU - Barré,N
AU - Jesacher,A
AU - Fells,J
AU - Katiyi,A
AU - Novitsky,A
AU - Karabchevsky,A
AU - Booth,MJ
PB - ArXiv
PY - 2022///
TI - On-chip beam rotators, polarizers and adiabatic mode converters through low-loss waveguides with variable cross-sections
UR - http://arxiv.org/abs/2112.02688v2
UR - http://hdl.handle.net/10044/1/97520
ER -