<abstract xmlns="http://www.w3.org/1999/xhtml">

A cascaded MZI-coupled ring resonator (CMCR) optical sensor based on silicon nitride waveguide is proposed. The sensor is composed of a large size microring and a bus waveguide coupled with the microring for four times. The three-segment bus and the microring waveguide between the four coupling regions form three MZI of the same size, forming a three-stage cascaded MZI. The resonant effect of the cascaded MZI transforms the smooth comb spectrum of the microring into a V-shaped comb spectrum, expands the effective free spectral range of the ring resonator, and realizes the cascaded MZI-coupled microring sensor with a large measurement range. For the cascade MZI-coupled microring with a radius of 100μm, the effective free spectrum range is 53.7nm, which is more than 24 times larger than that of the all-pass microring of the same size. The refractive index sensitivity is 339.49 nm RIU/and the detection limit is 2.95 × 10−5 RIU. these excellent properties prove the feasibility of cascaded MZI-coupled microring structure for large measurement range sensing, and are expected to be used in large refractive index range sensing applications in the future.
</abstract>

A cascaded MZI-coupled ring resonator (CMCR) optical sensor based on silicon nitride waveguide is proposed. The sensor is composed of a large size microring and a bus waveguide coupled with the microring for four times. The three-segment bus and the microring waveguide between the four coupling regions form three MZI of the same size, forming a three-stage cascaded MZI. The resonant effect of the cascaded MZI transforms the smooth comb spectrum of the microring into a V-shaped comb spectrum, expands the effective free spectral range of the ring resonator, and realizes the cascaded MZI-coupled microring sensor with a large measurement range. For the cascade MZI-coupled microring with a radius of 100μm, the effective free spectrum range is 53.7nm, which is more than 24 times larger than that of the all-pass microring of the same size. The refractive index sensitivity is 339.49 nm RIU/and the detection limit is 2.95 × 10−5 RIU. these excellent properties prove the feasibility of cascaded MZI-coupled microring structure for large measurement range sensing, and are expected to be used in large refractive index range sensing applications in the future.

Wide Range Si3N4 Optical Sensor Using Cascaded Mach-Zehnder Interferometer Coupled Ring Resonator

University of Chinese Academy of Sciences

Applied Mathematics and Nonlinear Sciences

This work is licensed under the Creative Commons Attribution 4.0 International License.

Wide Range SiN Optical Sensor Using Cascaded Mach-Zehnder Interferometer Coupled Ring Resonator

A cascaded MZI-coupled ring resonator (CMCR) optical sensor based on silicon nitride waveguide is proposed. The sensor is composed of a large size microring...

Wide Range Si₃N₄ Optical Sensor Using Cascaded Mach-Zehnder Interferometer Coupled Ring Resonator

Publié en ligne: 17 oct. 2023

Pages: -

Reçu: 29 nov. 2022

Accepté: 27 avr. 2023

DOI: https://doi.org/10.2478/amns.2023.2.00697

Mots clés
Cascaded MZI-Coupled Ring Resonator, Ring Resonator, Mach-Zehnder Interferometer

© 2023 Yuzhu Hu, published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Wide Range Si3N4 Optical Sensor Using Cascaded Mach-Zehnder Interferometer Coupled Ring Resonator

Publié en ligne: 17 oct. 2023

Pages: -

Reçu: 29 nov. 2022

Accepté: 27 avr. 2023

DOI: https://doi.org/10.2478/amns.2023.2.00697

Mots clésCascaded MZI-Coupled Ring Resonator, Ring Resonator, Mach-Zehnder Interferometer

© 2023 Yuzhu Hu, published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Wide Range Si₃N₄ Optical Sensor Using Cascaded Mach-Zehnder Interferometer Coupled Ring Resonator

Mots clés
Cascaded MZI-Coupled Ring Resonator, Ring Resonator, Mach-Zehnder Interferometer