Abstract
We fabricate low-loss single-mode (SM) polymer optical waveguides using a photomask-free simple technique named the Mosquito method. The insertion losses of a 5-cm long SM polymer waveguide fabricated are 2.52 dB and 4.03 dB at 1310- and 1550-nm wavelengths, respectively. The coupling loss between a single-mode fiber and the waveguide is as low as 0.5 dB including the Fresnel reflection. The 0.5-dB misalignment tolerance in the radial direction is ± 2.0 μm at 1550 nm. The Mosquito method is promising for fabricating SM polymer optical waveguides compatible with silicon photonics chips.
Highlights
Over the last several years, the data traffic in data centers has increased dramatically with the wide deployment of cloud computing services
We fabricate low-loss single-mode (SM) polymer optical waveguides using a photomask-free simple technique named the Mosquito method
The coupling loss between a single-mode fiber and the waveguide is as low as 0.5 dB including the Fresnel reflection
Summary
Over the last several years, the data traffic in data centers has increased dramatically with the wide deployment of cloud computing services. Single-mode fiber (SMF) based optical links are required for off-chip interconnects with Si photonics chips because Si waveguides have nanometer-scale cores to be operated as an SM waveguide, and longer and higher-bandwidth link distance that cannot be achieved by MMF links are required in large-scale data centers. These Si waveguides are mainly deployed within a chip, and so SM polymer optical waveguides are regarded as promising low-loss optical devices interoperable with low-loss Si waveguides and SMFs [2, 3]. In this paper, we fabricate SM waveguides using the Mosquito method under various conditions, and investigate their optical characteristics in more detail
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