Sketch of a cross section of elastomeric three-layered rib waveguide.
(a) three-layer SU8 mold and (b) cross section of the SU8 mold with two-layer elastomeric casting.
(a) SU8 waveguide trench cross section and (b) SU8 the coupler bump and tapering wide waveguide trench. The waveguide will eventually taper down from to final width.
(a) Cross section of PDMS waveguide and (b) elastomeric coupler trench and (c) fiber inside the coupler.
(a) SU8 waveguide trench with capping on the top surface and (b) around the corner. PEB temperature was at .
SU8 waveguide trench without capping on the top surface and corners. PEB temperature was at .
Illustration of the transparency mask used along with the waveguide trench pattern on top of the waveguide quartz mask.
Top view of microscopic images of the tapered waveguide trench (a) without and (b) with transparency mask on top of waveguide chrome mask. Both PEB temperatures were at .
Microscopic image (a) cross section of waveguide. (b) The light is confined inside the ridge and slab. Images were taken from a charge coupled device camera ( resolution) with magnification.
(a) (Cross section) The dashed line indicates the distorted cross section of the dissected surface. The solid lines show the two shear forces introduced by the cutting (arrows do not indicate the scale of the forces) and (b) Warped surface becomes more obvious at 45° angle.
Light intensity comparison between setup with coupler and without coupler (units in dBm).
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