Low loss integrated optical Y-branch

Rangaraj, M.; Minakata, Makoto; Kawakami, Shigeki

doi:10.1109/50.19110

Cited by 29 publications

(1 citation statement)

References 15 publications

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“…Although there have been many efforts to construct wide-angle branches, the bending or splitting angles are still limited to a few degrees for the conventional structures [1][2][3][4][5], owing to the inherent radiation loss at the branching region. Photonic crystals offer a way to eliminate radiation losses and thereby open the possibility of designing wideangle bends and branches with near-complete transmission.…”

Section: Introductionmentioning

confidence: 99%

Optical transformation design of waveguide bends and splitter in photonic crystals

Wang

Liu

Zhu

2015

Optics Communications

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Section: Introductionmentioning

confidence: 99%

Optical transformation design of waveguide bends and splitter in photonic crystals

Wang

Liu

Zhu

2015

Optics Communications

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Mode‐conversion type optical Y‐branching waveguides fabricated on glass substrate

Sawa

Ono

Hotta

1991

Electron Comm Jpn Pt II

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Y‐branching waveguides for optical splitting and mixing have been proposed and a low loss structure of these devices have been also proposed. We have also proposed a mode conversion type Y‐branching waveguide and the low loss characteristic of this device has been demonstrated by using numerical simulation based on the model of the step‐index type slab optical waveguide. The device structure is based on the structural condition for the multi‐mode coupling system derived from the mode coupling theory. It can be applied to waveguides other than the slab optical waveguide. In this study, it was experimentally investigated whether this method is applicable to the diffused type Y‐branching optical waveguide. In the Y‐branching mode converter formed on a soda‐lime glass, the loss characteristic can be estimated by the mode coupling theory. The loss in this type of device is lower than that in the conventional linear Y‐branching waveguide. It was also confirmed that the low loss structure used in the mode conversion type Y‐branching waveguide is applicable to the diffused channel optical waveguide.

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Analysis of 1 × 3 coupled‐waveguide optical power dividers by the implicit finite‐difference method

Yamauchi

Ando

Nakano

1993

Electron Comm Jpn Pt II

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Optical 1 × 3 power dividers composed of coupled waveguides are analyzed using the implicit finite‐difference method and the low‐loss configuration with reduced size is investigated. First, to check the accuracy of the method, the mismatching loss of the eigenmode of a straight waveguide is evaluated and it is verified that the error does not accumulate with the propagation distance. Next, the characteristics of 1 × 3 power dividers using coupled waveguides inclined with respect to each other are investigated and the range of the tilt angle and the effects of the angular error upon power distribution are clarified. To widen the tilt angle, which results in reduced‐size dividers, the corner bends with modified refractive‐index distribution are introduced. As a result, the loss of a 3‐degree tilt angle divider is found to be reduced by more than 1.5 dB due to the introduction of the corner bend with modified refractive‐index distribution.

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Low loss integrated optical Y-branch

Cited by 29 publications

References 15 publications

Optical transformation design of waveguide bends and splitter in photonic crystals

Optical transformation design of waveguide bends and splitter in photonic crystals

Mode‐conversion type optical Y‐branching waveguides fabricated on glass substrate

Analysis of 1 × 3 coupled‐waveguide optical power dividers by the implicit finite‐difference method

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