Koki Hirano

Polymer Optical Waveguide Chip: New Tool for Simple Evaluation of Optical Parameters of Waveguide Elements

A polymer optical chip consisting of 45°-angled cut straight waveguides, Y-splitters, and S-bend waveguides was designed and fabricated to examine a simple evaluation of multimode waveguides. Appropriate input condition was investigated for standardization of an evaluation method of optical characteristics of multimode waveguides.

Simple evaluation method of multimode polymer optical waveguides for next generation FTTH application

Polymer optical waveguide devices are getting popular for next generation FTTH application. In order to accelerate the development of polymer optical devices, evaluation of waveguide characteristics should be speeded up. Polymer optical chip containing a combination of 45°-angled cut waveguide, Y-splitter and S-bend structures was designed and fabricated for simple evaluation of multimode waveguides. Input launching such as light source, mode scrambler was investigated for reliable measurement.

Novel polymer materials for optical waveguides and their applications to polymer CWDM devices

We have developed several novel polymer materials for optical waveguides. In the first part of this paper, we described two examples of our developed materials, one is low loss optical waveguide materials for optical communications at near infrared wavelength region, the other is low loss and high heat resistant materials for optical interconnections in the electronic devices at around 850 nm wavelength region, which can resist to the lead-free solder reflowing process. In the second part, we demonstrated two kinds of novel low cost polymer coarse wavelength division multiplexing (CWDM) devices, one is the polymer arrayed waveguide grating (AWG) device and the other is the polymer CWDM device using the polymer diffraction grating. The structures and performances of these devices were described in detail.