Arbitrary on-chip optical filter using complex waveguide Bragg gratings

被引：50

作者：

Zhu, Tiecheng ^{[1
]}

Hu, Yiwen ^{[1
]}

Gatkine, Pradip ^{[2
]}

Veilleux, Sylvain ^{[2
,3
]}

Bland-Hawthorn, Joss ^{[4
,5
]}

Dagenais, Mario ^{[1
]}

机构：

[1] Univ Maryland, Dept Elect & Comp Engn, College Pk, MD 20742 USA

[2] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[3] Univ Maryland, Joint Space Sci Inst, College Pk, MD 20742 USA

[4] Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia

[5] Univ Sydney, Sch Phys, Sydney Astrophoton Instrumentat Labs, Sydney, NSW 2006, Australia

来源：

APPLIED PHYSICS LETTERS | 2016年 / 108卷 / 10期

关键词：

VOLUME HOLOGRAPHY; OH SUPPRESSION; SKY; METAMATERIALS; FABRICATION; ALGORITHM; INSULATOR; DESIGN; INDEX; LINES;

D O I：

10.1063/1.4943551

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate a Complex Waveguide Bragg Grating (CWBG) which can be designed to generate an arbitrary transmission spectrum. A comprehensive design method, based on the Layer Peeling/Adding algorithm, is developed to realize the grating on a silica-on-silicon platform. The CWBG has a simple one-layer waveguide structure for ease of fabrication. A spectral precision better than +/- 0.1 nm and a suppression ratio between 15 dB and 33 dB are achieved for a transmission spectrum consisting of 20 randomly distributed spectral notches with a 3 dB width of 0.3-0.4 nm. Among the CWBG's various potential applications, we highlight its use for eliminating OH emission lines from the Earth's atmosphere for ground-based astronomical observations. (C) 2016 AIP Publishing LLC.

引用

页数：5

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