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Flat-Top, Sharp-Edge Add-Drop Filters Using Complementary-Misalignment-Modulated Grating-Assited Contradirectional Couplers

We demonstrate flat-top, sharp-edge, silicon add-drop filters using apodized grating-assisted contradirectional couplers (contra-DCs). Periodic sidewall corrugations are imposed on both sides of two asymmetric strip waveguides for contradirectional coupling between the first two TE supermodes of a two-waveguide system. Gaussian apodization is applied to suppress the sidelobes. By laterally shifting the positions of both waveguide Bragg gratings in a complementary manner, which is called complementary lateral-misalignment modulation, our devices avoid phase errors which impair the spectral responses for conventional lateral-misalignment modulated contra-DCs. We demonstrate a complementary lateral-misalignment modulated (CLMM) contra-DC that has a flat-top, rapid roll-off, drop-port spectral response with a sidelobe suppression ratio (SLSR) of 20 dB. We also demonstrate a series-cascaded CLMM contra-DCs that has a higher SLSR of 39 dB and a sharper filtering edge.

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Informasi Detail

Judul Seri

JOURNAL OF LIGHTWAVE TECHNOLOGY; Vol.39 No.18 September 15 2021

No. Panggil

-

Penerbit

: .,

Deskripsi Fisik

p. 5896-5901

Bahasa

English

ISBN/ISSN

-

Klasifikasi

NONE

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

WAVEGUIDES
BRAGG REFLECTORS
WAVELENGTH FILTERING DEVICES
COUPLERS
INTEGRATED OPTICS DEVICE

Info Detail Spesifik

DOI: 10.1109/JLT.2021.3092045

Pernyataan Tanggungjawab

Huiye Qiu, Jinchun Niu, Xiong Liang, Xiuqiu Shen, Tingge Dai, Ping Yu, Rui Cheng

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