Temperature-insensitive refractive index sensor based on Mach–Zehnder interferometer with two microcavities

Yinfeng Wang; Sumei Wang; Lan Jiang; Hua Huang; Liuchao Zhang; Peng Wang; Lingya Lv; Zhitao Cao

doi:doi:10.3788/COL201715.020603

Chinese Optics Letters, 2017, 15 (2): 020603, Published Online: Jul. 26, 2018

Temperature-insensitive refractive index sensor based on Mach–Zehnder interferometer with two microcavities Download： 1121次

Yinfeng Wang ¹Sumei Wang ^1,*Lan Jiang ¹Hua Huang ²Liuchao Zhang ³Peng Wang ¹Lingya Lv ¹Zhitao Cao ¹

Author Affiliations

¹ Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China

² Vibration and Noise Control Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China

³ School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China

Figures & Tables

Fig. 1. Schematic diagram of the microcavities-based MZI.

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Fig. 2. Microscopic image of (a) the PCF cross-section, (b) microcavity 1 of sensor 2, (c) microcavity 1 of sensor 3, (d) microcavity 1 of sensor 4, and (e) microcavity and collapse area.

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Fig. 3. Transmission spectra of the sensors 1, 2, 3, and 4.

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Fig. 4. Wavelength shifts of interference spectrum of (a) sensor 1, (b) sensor 2, (c) sensor 3, and (d) sensor 4.

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Fig. 5. Relations between wavelength shifts and the surrounding RI of different sensors.

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Fig. 6. Spatial frequency spectra of sensors 1 and 4.

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Fig. 7. Wavelength shifts with the increase of the temperatures for sensor 4.

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Table1. Microcavity Sizes and Related Arc Powera

Parameters	Sensor 2	Sensor 3	Sensor 4
Arc power (%)	70%	60%	50%
ED 1 (μm)	33.1	38.3	44.6
PD 1 (μm)	14.3	12.0	10.6
ED 2 (μm)	30.9	36.6	42.9
PD 2 (μm)	15.1	13.1	10.0

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Yinfeng Wang, Sumei Wang, Lan Jiang, Hua Huang, Liuchao Zhang, Peng Wang, Lingya Lv, Zhitao Cao. Temperature-insensitive refractive index sensor based on Mach–Zehnder interferometer with two microcavities[J]. Chinese Optics Letters, 2017, 15(2): 020603.

Temperature-insensitive refractive index sensor based on Mach–Zehnder interferometer with two microcavities Download： 1121次

Fig. 1. Schematic diagram of the microcavities-based MZI.

Fig. 2. Microscopic image of (a) the PCF cross-section, (b) microcavity 1 of sensor 2, (c) microcavity 1 of sensor 3, (d) microcavity 1 of sensor 4, and (e) microcavity and collapse area.

Fig. 3. Transmission spectra of the sensors 1, 2, 3, and 4.

Fig. 4. Wavelength shifts of interference spectrum of (a) sensor 1, (b) sensor 2, (c) sensor 3, and (d) sensor 4.

Fig. 5. Relations between wavelength shifts and the surrounding RI of different sensors.

Fig. 6. Spatial frequency spectra of sensors 1 and 4.

Fig. 7. Wavelength shifts with the increase of the temperatures for sensor 4.

Table1. Microcavity Sizes and Related Arc Powera

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Temperature-insensitive refractive index sensor based on Mach–Zehnder interferometer with two microcavities Download： 1121次

Fig. 1. Schematic diagram of the microcavities-based MZI.

Fig. 2. Microscopic image of (a) the PCF cross-section, (b) microcavity 1 of sensor 2, (c) microcavity 1 of sensor 3, (d) microcavity 1 of sensor 4, and (e) microcavity and collapse area.

Fig. 3. Transmission spectra of the sensors 1, 2, 3, and 4.

Fig. 4. Wavelength shifts of interference spectrum of (a) sensor 1, (b) sensor 2, (c) sensor 3, and (d) sensor 4.

Fig. 5. Relations between wavelength shifts and the surrounding RI of different sensors.

Fig. 6. Spatial frequency spectra of sensors 1 and 4.

Fig. 7. Wavelength shifts with the increase of the temperatures for sensor 4.

Table1. Microcavity Sizes and Related Arc Powera

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