Si waveguide polarisation rotation chirped Bragg grating

Okayama, Hideaki; Onawa, Yosuke; Shimura, Daisuke; Yaegashi, Hiroki; Sasaki, Hirokazu

doi:10.1049/el.2016.4025

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…The problem of narrow stop band can be overcome by using chirped grating. 33) We also showed theoretically that a flat-top response can be obtained by a two cavity structure. The features of devices described in Sects.…”

Section: Discussionmentioning

confidence: 71%

Silicon waveguide polarization rotation Bragg grating with resonator cavity section

Okayama

Onawa

Shimura

et al. 2017

Jpn. J. Appl. Phys.

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Bragg grating with resonator cavity that converts the input polarization to orthogonal polarization is reported. The device works similar to a Fabry–Pérot or ring resonators and very narrow polarization independent wavelength peak can be generated. The transfer matrix methods are used to examine the device characteristics. A 0.2-nm-wide polarization independent transmission wavelength peak was obtained by experiment. We also show theoretically using finite-difference-time-domain method that a flat-top response can be obtained by a two cavity structure.

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Section: Discussionmentioning

confidence: 71%

Silicon waveguide polarization rotation Bragg grating with resonator cavity section

Okayama

Onawa

Shimura

et al. 2017

Jpn. J. Appl. Phys.

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“…[20][21][22][23][24][25][26][27] We reported experimental polarization rotation Bragg grating devices using a waveguide with nonvertical side wall, rib waveguide, and terrace corrugation structures. We showed that many types of polarization rotating grating structures such as sampled grating, superstructure, chirped period, and cavity incorporated devices [28][29][30][31][32] can possibly be obtained.…”

Section: Introductionmentioning

confidence: 99%

Polarization rotation Bragg grating using Si waveguide with top surface groove grating and terrace

Okayama¹,

Onawa²,

Shimura³

et al. 2018

Jpn. J. Appl. Phys.

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We report a silicon-waveguide-type polarization rotation Bragg grating with high diffraction efficiency to be used in a wavelength filter. An antisymmetric grating structure formed on the top surface of the waveguide with a terrace is used to generate polarization rotation Bragg diffraction. The finite difference time domain method is used to simulate the device. We found that introducing a side terrace of 25 to 75 nm can attain a high diffraction efficiency. The diffraction efficiency can be more than 20% larger when using this structure. A 300-nm-thick waveguide used in foundries is beneficial for fabricating a device showing large diffraction and main-subpeak separation.

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