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Theory of the Prism–Film Coupler by Plane-Wave Analysis
Abstract
A laser beam can be coupled with high efficiency into a light-guiding thin film by means of a prism–film coupler. Basically this device is a totally reflecting prism, the light-guiding film being separated from the reflecting prism face by a narrow gap of reduced refractive index. This coupling scheme is analyzed in detail by the method of plane-wave expansion. It is shown how the coupling efficiency is determined by the competition between the desired coupling effect and the reverse effect of leakage. A general condition is derived under which the transverse profile of the input beam continues undistorted into the guide. The theory is illustrated for a gaussian beam, which allows a maximum coupling efficiency of 0.80.
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Citations
Cited by
Measurement of Thin Film Parameters with a Prism Coupler
Ulrich, R., & Torge, R. (1973) · Applied Optics · doi:10.1364/ao.12.002901 · Cited by 964
Self-citationSolitary Waves in Quadratically Nonlinear Resonators
Etrich, C., Peschel, U., & Lederer, F. (1997) · Physical Review Letters · doi:10.1103/physrevlett.79.2454 · Cited by 108
Metadata
- Authors
- Ulrich, R.
- Venue
- Journal of the Optical Society of America
- Publisher
- Optica Publishing Group
- Published
- 1970-10-01
- Volume
- 60
- Issue
- 10
- Pages
- 1337
- ISSN
- 0030-3941 (ISSN-L)
- OpenAlex
- W2024510267
- Cited by
- 356
- References
- 0
- FWCI
- 15.37
- Type
- journal article
- Language
- en
- Open access
- closed
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- Ulrich, R. (1970). Theory of the Prism–Film Coupler by Plane-Wave Analysis. Journal of the Optical Society of America. https://doi.org/10.1364/josa.60.001337
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
