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Nondestructive two-dimensional refractive-index profiling of integrated-optical waveguides by an interferometric
Applied Optics
|August 19, 2010
Summary
This study presents an interferometric method to determine the 2D refractive index profile of optical waveguides. The technique accurately characterizes potassium-sodium ion-exchanged channel waveguides, aligning well with theoretical predictions.
Area of Science:
- Optoelectronics
- Materials Science
- Photonics
Background:
- Integrated optical waveguides are crucial components in photonic circuits.
- Accurate characterization of their refractive index profiles is essential for device performance.
- Existing methods may have limitations in fully determining the 2D refractive index distribution.
Purpose of the Study:
- To introduce a novel interferometric method for complete 2D refractive index profiling of optical waveguides.
- To validate the method using potassium-sodium ion-exchanged channel waveguides.
- To compare experimental results with theoretical models.
Main Methods:
- Utilized an interference microscope for optical measurements.
- Employed an interferometric technique to probe the waveguide structure.
- Assumed a known one-dimensional depth profile to determine the full 2D profile.
Main Results:
- Successfully determined the complete two-dimensional refractive index profile.
- Obtained results for potassium-sodium ion-exchanged channel waveguides.
- Experimental data showed good agreement with theoretical predictions.
Conclusions:
- The described interferometric method is effective for comprehensive 2D refractive index profiling.
- This technique provides accurate characterization of ion-exchanged optical waveguides.
- The findings support the validity and utility of the developed method in optical waveguide analysis.
