TY - GEN
T1 - Direct Laser Writing Spiral Sagnac Waveguide for Sensing Magnetic Field with Ultrahigh Sensitivity
AU - Zhang, Dengwei
AU - Zhang, Zhihang
AU - Wei, Heming
AU - Qiu, Jianrong
AU - Krishnaswamy, Sridhar
N1 - Funding Information:
Major Scientific Facilities Project Funding in Zhejiang Lab (2019MB0AD01); STCSM (SKLSFO 2020-01); National Natural Science Foundation of China (61203190, 62005153); Natural Science Foundation of Shanghai (20ZR1420300); Natural Science Foundation of Zhejiang Province (LY17F-030010).
Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - A high-birefringence spiral Sagnac waveguide (SSW) device fabricated via direct laser writing (DLW) using a two-photo polymerization (2PP) technique is proposed, designed and experimentally demonstrated as an ultrahigh magnetic field sensor. The sensor comprises a Y-style tapered waveguide and a SSW containing two microfluidic channels. The SSW has a total length of 2.4 mm and a spiral radius of 200 µm. Due to the asymmetric structure, the SSW has a high birefringence of 0.016, which can be designed as a magnetic field sensor, as a magnetic fluid can be filled into the microfluidic channel changing the guiding mode and the birefringence and consequently leading to a change in phase of the interferometer when the applied magnetic field changes. The experimental results show that the proposed photonic device has a sensitivity to magnetic field as high as 0.48nm/Oe within a range from 10 Oe to 100 Oe. The proposed device is very stable and easy to be fabricated, and can therefore be used for weak magnetic fields detection.
AB - A high-birefringence spiral Sagnac waveguide (SSW) device fabricated via direct laser writing (DLW) using a two-photo polymerization (2PP) technique is proposed, designed and experimentally demonstrated as an ultrahigh magnetic field sensor. The sensor comprises a Y-style tapered waveguide and a SSW containing two microfluidic channels. The SSW has a total length of 2.4 mm and a spiral radius of 200 µm. Due to the asymmetric structure, the SSW has a high birefringence of 0.016, which can be designed as a magnetic field sensor, as a magnetic fluid can be filled into the microfluidic channel changing the guiding mode and the birefringence and consequently leading to a change in phase of the interferometer when the applied magnetic field changes. The experimental results show that the proposed photonic device has a sensitivity to magnetic field as high as 0.48nm/Oe within a range from 10 Oe to 100 Oe. The proposed device is very stable and easy to be fabricated, and can therefore be used for weak magnetic fields detection.
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U2 - 10.1109/PIERS55526.2022.9793148
DO - 10.1109/PIERS55526.2022.9793148
M3 - Conference contribution
AN - SCOPUS:85132777350
T3 - Progress in Electromagnetics Research Symposium
SP - 862
EP - 872
BT - 2022 Photonics and Electromagnetics Research Symposium, PIERS 2022 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2022 Photonics and Electromagnetics Research Symposium, PIERS 2022
Y2 - 25 April 2022 through 29 April 2022
ER -