Optical Waveguide Films With Two-Layer Skirt-Type Core Structures for Beam Leakage/Scattering Reduction at Tapered Mirrors

Yoshimura, Tetsuzo; Ogushi, Kazuhiro; Kitabayashi, Yohei; Miyamoto, Yoshihisa; Miyazaki, Masayoshi

doi:10.1109/lpt.2007.903507

Cited by 2 publications

(4 citation statements)

References 6 publications

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“…In the skirt-type core, on the other hand, the beam propagation in the left-side/right-side directions disappears. 9 These results indicate that the two-layer skirt-type core structure is effective to suppress undesired beam leakage/scattering at 45 o mirrors.…”

Section: D Two-layer Skirt-type Corementioning

confidence: 80%

“…Comparing to the conventional core, guided beam leakage is drastically reduced in the two-layer core. 9 Power ratio of the reflected and input beams increases to ~85% in the proposed structure from ~40% in the conventional structure. Fig.…”

Section: D Two-layer Skirt-type Corementioning

confidence: 86%

“…10 shows the two-layer skirt-type core structure we proposed. 9 The core has a layered structure consisting of lowindex (LI) part and high-index (HI) part. In this structure the LI part located between the HI part and the cladding film prevents guided beams from tunneling into the cladding film.…”

Section: D Two-layer Skirt-type Corementioning

confidence: 99%

“…12 shows a fabrication process based on the built-in mask method for optical waveguide films with 45 o mirrors having the two-layer skirt-type cores. 9 On a glass substrate, metal films were deposited with windows of core patterns. After a poly-vinyl-alcohol (PVA) removable layer and a cladding film were successively formed on the surface, LI layer of 10-µm thickness was coated/pre-baked.…”

Section: Cladding Filmmentioning

confidence: 99%

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Optical waveguide films with two-layer skirt-type core end facets for beam leakage reduction at 45° mirrors

et al. 2008

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Three-dimensional optical wiring, consisting of stacked optical waveguide films with 45 o mirrors, is a backbone for integrated optical interconnects and solar energy conversion systems. By using the self-organized lightwave network (SOLNET) technique, we observed leakage/scattering of guided light beams at 45 o mirrors of core end facets in optical waveguide films. When 405-nm write beams were introduced into the optical waveguide having a photo-refractive material layer on the back, three excess lines of SOLNET, which may be caused by the guided beam tunneling into the cladding film and by the refraction at core end facet corners, were grown from the 45 o mirror, in addition to a vertical waveguide of SOLNET formed by reflected beams. To reduce the leakage/scattering, we proposed the two-layer skirttype cores with low-index (LI) part and high-index (HI) part. The LI part located between the HI part and the cladding film prevents the guided beams from tunneling into the film. The skirt-type core end facets put the corners away from the beam path. These effects were confirmed by simulations using the beam propagation method and the finite difference time domain method. Optical waveguide films with the proposed structure were fabricated by the built-in mask method.

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Section: D Two-layer Skirt-type Corementioning

confidence: 80%

Section: D Two-layer Skirt-type Corementioning

confidence: 86%

Section: D Two-layer Skirt-type Corementioning

confidence: 99%

Section: Cladding Filmmentioning

confidence: 99%

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