Single mode field analysis and adjustment on polymer waveguides understanding the reasons for coupling losses

Uwe Hollenbach; Hans-Jürgen Boehm; Jürgen Mohr; K. Pfeiffer

doi:10.1117/12.782076

15 May 2008 Single mode field analysis and adjustment on polymer waveguides understanding the reasons for coupling losses

Uwe Hollenbach, Hans-Jürgen Boehm, Jürgen Mohr, K. Pfeiffer

Author Affiliations +

Proceedings Volume 6992, Micro-Optics 2008; 69920Y (2008) https://doi.org/10.1117/12.782076
Event: SPIE Photonics Europe, 2008, Strasbourg, France

Abstract

Integrated optic single mode waveguides in polymer substrates are of interest for several applications especially in the visible wavelength range e.g. to build waveguide components for biophotonic, sensors or passive splitters. The manufacturing process contains DUV or UV lithography and some different pre or post exposure bakes depending on the used type of polymer. Chromium masks offer facile and controllable processing and rapid exposure times. Surface waveguides can be covered with an index matched cladding substrate on top to get buried light guiding. The end faces and also the over all thickness of about 1 mm of the component packages gives the possibility for a stable coupling between fiber arrays and planar waveguide substrates. The paper describes the results of a single mode field analysis and the experimental adjustment of polymer waveguides for wavelengths within the visible range of light to achieve low coupling losses. Some different manufacturing process steps are compared depending on the used polymer material. A comparison between the measured waveguides and fiber mode near field diameters and the nominal calculated numerical apertures are presented. The different insertion loss is measured and illustrated as well.

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Uwe Hollenbach, Hans-Jürgen Boehm, Jürgen Mohr, and K. Pfeiffer "Single mode field analysis and adjustment on polymer waveguides understanding the reasons for coupling losses", Proc. SPIE 6992, Micro-Optics 2008, 69920Y (15 May 2008); https://doi.org/10.1117/12.782076

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KEYWORDS

Waveguides

Channel waveguides

Epoxies

Polymethylmethacrylate

Polymers

Refractive index

Single mode fibers

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