Data File 3.csv

Sample A1, propagation loss measurement by out-of-plane scattering. 11 images from a MIR camera were stitched together. The first column gives distance in cm and it is followed by counts per pixel. The waveguide is aligned to the middle of the data. Loss calculation was done by integrating 6 pixels across the waveguide, and subtracting background at 23 pixel distance from the waveguide centre on both sides. 2x2 pixels were taken for the background. Subsequently, data was converted into logarithmic decay and fitted from 0.2cm to 1.9cm to avoid interference with the in-coupling and out-coupling. Insertion loss was obtained by measuring the transmission through the setup with the waveguide chip (WGC) and objective lenses (OLs) (147269mV), and without WGS and OLs (1422mV). Loss from the two OLs was measured as 2dB. This gives insertion loss of 18.2dB. Coupling loss was calculated by subtracting the total propagation loss of the 2cm sample from insertion loss, and dividing by 2.