Optical frequency comb based system for photonic refractive index sensor interrogation

被引：18

作者：

Knoerzer, Markus ^{[1
]}

Szydzik, Crispin ^{[1
,2
]}

Ren, Guanghui ^{[1
]}

Huertas, Cesar S. ^{[1
]}

Palmer, Sonya ^{[1
]}

Phuong Tang ^{[1
]}

Nguyen, Thach G. ^{[1
]}

Bui, Lam ^{[3
]}

Boes, Andreas ^{[1
]}

Mitchell, Arnan ^{[1
]}

机构：

[1] RMIT Univ, Sch Engn, GPO Box 2476, Melbourne, Vic 3001, Australia

[2] Monash Univ, Australian Ctr Blood Dis, Alfred Med Res & Educ Precinct, 99 Commercial Rd, Melbourne, Vic 3004, Australia

[3] Cent Queensland Univ, Sch Engn & Technol, 120 Spencer St, Melbourne, Vic 3000, Australia

来源：

OPTICS EXPRESS | 2019年 / 27卷 / 15期

基金：

澳大利亚研究理事会;

关键词：

BIOSENSORS; SENSITIVITY; PERFORMANCE;

D O I：

10.1364/OE.27.021532

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this contribution, we demonstrate how an optical frequency comb can be used to enhance the functionality of an integrated photonic biosensor platform. We show that if an optical frequency comb is used to sample the spectral response of a Mach-Zehnder interferometer and if the line spacing is arranged to sample the periodic response at 120 degrees intervals, then it is possible to combine these samples into a single measurement of the interferometer phase. This phase measurement approach is accurate, independent of the bias of the interferometer and robust against intensity fluctuations that are common to each of the comb lines. We demonstrate this approach with a simple silicon photonic interferometric refractive index sensor and show that the benefits of our approach can be obtained without degrading the lower limit of detection of 3.70x10(-7) RIU. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：21532 / 21545

页数：14

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