WAVEGUIDE IMAGING & MEASUREMENT
Accurate refractive index measurement is necessary for the development, the optimization and the quality monitoring of produced photonic devices.
As a non-destructive method, QPI gives a precise refractive index profile with sub nanometer precision of waveguides in semi-transparent sample such as glass.
The measurement is single shot and the information extraction is quasi immediate (only one profile plot on the waveguide image). The SID4-Imaging system is adapted for measurement on either optical fiber or laser written waveguide.
- Adapted for waveguide dimensions down to limit of diffraction
- Immediate measurement thanks to single shot imaging
Tool that can be implemented to study and control in real time the inscription process of optical waveguides.
Waveguide measurement with quantitative phase
Waveguide imaging can be done in two different configurations: in XY or in the orthogonal plane.
By knowing the mechanical size of the waveguide, we can retrieve refractive index values.
OPD = (nwaveguide – nsusbtrate) x mechanical thickness (nm)