2021
DOI: 10.3390/photonics9010008
|View full text |Cite
|
Sign up to set email alerts
|

Compact Gas Sensor Using Silicon-on-Insulator Loop-Terminated Mach–Zehnder Interferometer

Abstract: In this paper, we propose a compact optical gas sensor based on the widespread silicon-on-insulator (SOI) technology, operating in the near-infrared (NIR) region around the 1.55 µm wavelength. The sensor employs a loop-terminated Mach–Zehnder interferometer (LT-MZI) with a slot waveguide and a strip waveguide for the sensing arm and the reference arm, respectively. For the same arm length, the LT-MZI can achieve a detection limit two times lower than that of the conventional MZI. Different sensor components we… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
4
1

Citation Types

0
12
0

Year Published

2022
2022
2024
2024

Publication Types

Select...
3
2
1

Relationship

1
5

Authors

Journals

citations
Cited by 13 publications
(12 citation statements)
references
References 54 publications
0
12
0
Order By: Relevance
“…The outer rings here act as Sagnac loop reflectors [30]. We note that even though variants of this geometry have been considered before for building various optical devices for different applications such as sensing, lasing, and information processing [31][32][33][34][35], the peculiar feature that we highlight in this work has escaped attention.…”
Section: Integrated Photonics Implementationmentioning
confidence: 99%
“…The outer rings here act as Sagnac loop reflectors [30]. We note that even though variants of this geometry have been considered before for building various optical devices for different applications such as sensing, lasing, and information processing [31][32][33][34][35], the peculiar feature that we highlight in this work has escaped attention.…”
Section: Integrated Photonics Implementationmentioning
confidence: 99%
“…Sensors working principles are usually based on different con gurations with strong optical resonating and interference effects such as ring resonators [8-9], and Mach Zender interferometers [10][11].…”
Section: Introductionmentioning
confidence: 99%
“…To further enhance the sensing accuracy of the sensor, the slot waveguide was proposed due to its capability of confining and guiding light in nanoscale voids (low RI) between two high-index regions [ 2 , 3 ]. Slot waveguides allow for higher optical field interaction with the analyte compared to other waveguides [ 4 ], and they have been employed in sensors, amplifiers, power-combiners [ 5 ], array antennas [ 6 ], and modulators [ 7 ]. Meanwhile, the slot waveguide enables light to transmit in an external medium area with a low refractive index, solving the problem of mode loss due to the principle of total internal reflection [ 8 , 9 , 10 ].…”
Section: Introductionmentioning
confidence: 99%
“…This is mainly due to the possibility of having strong optical field confinement and then extremely small footprint devices [ 12 ]. In 2021, Raghi S. El Shamy et al proposed a compact optical gas sensor based on the widespread silicon-on-insulator (SOI) technology with a device sensitivity of 1070 nm/RIU and a figure-of-merit (FOM) as high as 280.8 RIU−1 at the 1.55 μm wavelength [ 4 ]. In 2022, Bingyao Shi et al proposed a novel all-pass slot microring resonator (SMRR).…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation