Birefringence induced Vernier effect in optical fiber modal interferometers for enhanced sensing
We report a simple and effective method to improve the sensitivities of fiber-optic modal interferometers with birefringence induced Vernier effect. Taking optical microfiber coupler as an example, we study the sensitivity enhancement of a microfiber coupler for refractive index (RI) sensing both th...
Saved in:
Main Authors: | , , , , , , |
---|---|
Other Authors: | |
Format: | Article |
Language: | English |
Published: |
2019
|
Subjects: | |
Online Access: | https://hdl.handle.net/10356/80530 http://hdl.handle.net/10220/50377 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Institution: | Nanyang Technological University |
Language: | English |
id |
sg-ntu-dr.10356-80530 |
---|---|
record_format |
dspace |
spelling |
sg-ntu-dr.10356-805302020-09-26T22:04:32Z Birefringence induced Vernier effect in optical fiber modal interferometers for enhanced sensing Li, Kaiwei Zhang, Nan Zhang, Nancy Meng Ying Zhou, Wenchao Zhang, Ting Chen, Ming Wei, Lei School of Electrical and Electronic Engineering Research Techno Plaza Engineering::Electrical and electronic engineering Optical Fiber Sensors Optical Microfiber Couplers We report a simple and effective method to improve the sensitivities of fiber-optic modal interferometers with birefringence induced Vernier effect. Taking optical microfiber coupler as an example, we study the sensitivity enhancement of a microfiber coupler for refractive index (RI) sensing both theoretically and experimentally in the RI range of 1.33–1.35 where bioassays are typically carried out. Numerical results show that by tracing the wavelength shifts of dips in the envelope formed by the Vernier effect, RI sensitivities can be improved by almost one order of magnitude compared to the sensors without the Vernier effect. Then we experimentally achieve an ultra-high sensitivity of 35,823.3 nm/RIU using a microfiber coupler with a width of 3.2 μm. More importantly, we apply this ultra-sensitive sensor to detect human cardiac troponin, and a limit of detection of 1 ng/mL is achieved. This sensor is simple in configuration andcan serve as a bio-photonic platform for clinical diagnostics environmental monitoring and food safety. MOE (Min. of Education, S’pore) Accepted version 2019-11-08T03:02:04Z 2019-12-06T13:51:33Z 2019-11-08T03:02:04Z 2019-12-06T13:51:33Z 2018 Journal Article Li, K., Zhang, N., Zhang, N. M. Y., Zhou, W., Zhang, T., Chen, M., & Wei, L. (2018). Birefringence induced Vernier effect in optical fiber modal interferometers for enhanced sensing. Sensors and Actuators B: Chemical, 27516-24. doi:10.1016/j.snb.2018.08.027 0925-4005 https://hdl.handle.net/10356/80530 http://hdl.handle.net/10220/50377 10.1016/j.snb.2018.08.027 en Sensors and Actuators B: Chemical © 2018 Elsevier. All rights reserved. This paper was published in Sensors and Actuators B: Chemical and is made available with permission of Elsevier. 16 p. application/pdf |
institution |
Nanyang Technological University |
building |
NTU Library |
country |
Singapore |
collection |
DR-NTU |
language |
English |
topic |
Engineering::Electrical and electronic engineering Optical Fiber Sensors Optical Microfiber Couplers |
spellingShingle |
Engineering::Electrical and electronic engineering Optical Fiber Sensors Optical Microfiber Couplers Li, Kaiwei Zhang, Nan Zhang, Nancy Meng Ying Zhou, Wenchao Zhang, Ting Chen, Ming Wei, Lei Birefringence induced Vernier effect in optical fiber modal interferometers for enhanced sensing |
description |
We report a simple and effective method to improve the sensitivities of fiber-optic modal interferometers with birefringence induced Vernier effect. Taking optical microfiber coupler as an example, we study the sensitivity enhancement of a microfiber coupler for refractive index (RI) sensing both theoretically and experimentally in the RI range of 1.33–1.35 where bioassays are typically carried out. Numerical results show that by tracing the wavelength shifts of dips in the envelope formed by the Vernier effect, RI sensitivities can be improved by almost one order of magnitude compared to the sensors without the Vernier effect. Then we experimentally achieve an ultra-high sensitivity of 35,823.3 nm/RIU using a microfiber coupler with a width of 3.2 μm. More importantly, we apply this ultra-sensitive sensor to detect human cardiac troponin, and a limit of detection of 1 ng/mL is achieved. This sensor is simple in configuration andcan serve as a bio-photonic platform for clinical diagnostics environmental monitoring and food safety. |
author2 |
School of Electrical and Electronic Engineering |
author_facet |
School of Electrical and Electronic Engineering Li, Kaiwei Zhang, Nan Zhang, Nancy Meng Ying Zhou, Wenchao Zhang, Ting Chen, Ming Wei, Lei |
format |
Article |
author |
Li, Kaiwei Zhang, Nan Zhang, Nancy Meng Ying Zhou, Wenchao Zhang, Ting Chen, Ming Wei, Lei |
author_sort |
Li, Kaiwei |
title |
Birefringence induced Vernier effect in optical fiber modal interferometers for enhanced sensing |
title_short |
Birefringence induced Vernier effect in optical fiber modal interferometers for enhanced sensing |
title_full |
Birefringence induced Vernier effect in optical fiber modal interferometers for enhanced sensing |
title_fullStr |
Birefringence induced Vernier effect in optical fiber modal interferometers for enhanced sensing |
title_full_unstemmed |
Birefringence induced Vernier effect in optical fiber modal interferometers for enhanced sensing |
title_sort |
birefringence induced vernier effect in optical fiber modal interferometers for enhanced sensing |
publishDate |
2019 |
url |
https://hdl.handle.net/10356/80530 http://hdl.handle.net/10220/50377 |
_version_ |
1681058005868609536 |