Wavelength-selective filters for single-mode fiber WDM systems using Fabry-Perot interferometers

An extrinsic Fabry-Perot (F-P) interferometric (EFPI) sensor by using simple etching and fusing method is proposed and demonstrated. The cavity is formed by wet chemical etching of multi-mode fiber (MMF) end face in hydrofluoric acid solutions, and then it is fused to the end of a single-mode fiber (SMF) to form an extrinsic F-P structure. The strain and temperature of EFPI sensor are studied experimentally. The experimental results show that the interference wavelength becomes 2.648nm longer while the strain increases from 0N to 637N, and the strain sensitivity is about 0.004nm/N, and linearity is 0.999. The interference wavelength becomes 0.032nm shorter while the temperature increases from 20°C to 100°C. This kind of sensor has the many advantages of easy fabrication, good reliability, high-repetition, small size, low cost and mass-production, which offers great prospect for sensing applications.

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A Micro Bubble Structure Based Fabry–Perot Optical Fiber Strain Sensor with High Sensitivity and Low-Cost Characteristics

Sensors ◽

10.3390/s17030555 ◽

2017 ◽

Vol 17 (3) ◽

pp. 555 ◽

Cited By ~ 26

Author(s):

Lu Yan ◽

Zhiguo Gui ◽

Guanjun Wang ◽

Yongquan An ◽

Jinyu Gu ◽

...

Keyword(s):

Low Cost ◽

Strain Sensor ◽

Glass Tube ◽

High Sensitivity ◽

Single Mode ◽

Single Mode Fiber ◽

Fabry Perot ◽

Micro Bubble ◽

Bubble Structure ◽

Cost Characteristics

A high-sensitivity, low-cost, ultrathin, hollow fiber micro bubble structure was proposed; such a bubble can be used to develop a high-sensitivity strain sensor based on a Fabry–Perot interferometer (FPI). The micro bubble is fabricated at the fiber tip by splicing a glass tube to a single mode fiber (SMF) and then the glass tube is filled with gas in order to expand and form a micro bubble. The sensitivity of the strain sensor with a cavity length of about 155 μm and a bubble wall thickness of about 6 μm was measured to be up to 8.14 pm/μϵ.

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Research on a Novel Fabry–Perot Interferometer Model Based on the Ultra-Small Gradient-Index Fiber Probe

Sensors ◽

10.3390/s19071538 ◽

2019 ◽

Vol 19 (7) ◽

pp. 1538 ◽

Cited By ~ 1

Author(s):

Chi Wang ◽

Jianmei Sun ◽

Chenye Yang ◽

Bin Kuang ◽

Dong Fang ◽

...

Keyword(s):

Output Voltage ◽

Experimental System ◽

Single Mode ◽

Single Mode Fiber ◽

Gradient Index ◽

The Novel ◽

Fiber Probe ◽

Model Based ◽

Fabry Perot ◽

Working Distance

A novel Fabry–Perot (F–P) interferometer model based on the ultra-small gradient-index (GRIN) fiber probe is investigated. The signal arm of the F–P interferometer is organically combined with the ultra-small GRIN fiber probe to establish the theoretical model of the novel F–P interferometer. An interferometer experimental system for vibration measurements was built to measure the performance of the novel F–P interferometer system. The experimental results show that under the given conditions, the output voltage of the novel interferometer is 3.9 V at the working distance of 0.506 mm, which is significantly higher than the output voltage 0.48 V of the single-mode fiber (SMF) F–P interferometer at this position. In the range of 0.1–2 mm cavity length, the novel interferometer has a higher output voltage than an SMF F–P interferometer. Therefore, the novel F–P interferometer is available for further study of the precise measurement of micro vibrations and displacements in narrow spaces.

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Miniature on-fiber extrinsic Fabry-Perot interferometric vibration sensors based on micro-cantilever beam

Nanotechnology Reviews ◽

10.1515/ntrev-2019-0028 ◽

2019 ◽

Vol 8 (1) ◽

pp. 293-298 ◽

Cited By ~ 1

Author(s):

Weiyi Ma ◽

Yi Jiang ◽

Han Zhang ◽

Liuchao Zhang ◽

Jie Hu ◽

...

Keyword(s):

Cantilever Beam ◽

Single Mode ◽

Single Mode Fiber ◽

Vibration Sensor ◽

Fiber Axis ◽

Vibration Sensors ◽

Beam Design ◽

Cantilever Length ◽

Fabry Perot ◽

Micro Cantilever

Abstract An on-fiber extrinsic Fabry–Perot interferometric (EFPI) vibration sensor based on micro-cantilever beam is proposed and experimentally demonstrated. The micro-cantilever beam, with a cantilever length of 80μm and a cantilever thickness of 5μm, is created perpendicular to the fiber axis by using the femtosecond laser micro-machining technique. The on-fiber vibration sensor has same diameter with that of the single mode fiber. An acceleration sensitivity of 11.1 mV/g@300 Hz in the range of 0.5-5g is demonstrated experimentally. This on-fiber and micro-cantilever beam design allows for the sensor to be smaller size and higher temperature resistance.

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General analysis of single-mode fiber Fabry–Perot cavity with birefringence

Microwave and Optical Technology Letters ◽

10.1002/mop.23018 ◽

2007 ◽

Vol 50 (1) ◽

pp. 101-103 ◽

Cited By ~ 3

Author(s):

Haiyan Chen

Keyword(s):

Single Mode ◽

Single Mode Fiber ◽

General Analysis ◽

Fabry Perot

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Cascaded-Cavity Fabry-Perot Interferometric Gas Pressure Sensor based on Vernier Effect

Sensors ◽

10.3390/s18113677 ◽

2018 ◽

Vol 18 (11) ◽

pp. 3677 ◽

Cited By ~ 8

Author(s):

Peng Chen ◽

Yutang Dai ◽

Dongsheng Zhang ◽

Xiaoyan Wen ◽

Minghong Yang

Keyword(s):

Capillary Tube ◽

High Sensitivity ◽

Single Mode ◽

Single Mode Fiber ◽

Gas Pressure ◽

Glass Capillary ◽

Compact Structure ◽

Fabry Perot ◽

Fs Laser ◽

Vernier Effect

An extrinsic Fabry-Perot interferometer (EFPI) composed of double fiber FP cavities in a glass capillary tube to generate Vernier effect has been fabricated and employed for gas pressure sensing. A lead-in single-mode fiber (LSMF) and a reflective single-mode fiber (RSMF) were inserted into the capillary tube to form a FP cavity. Femtosecond (fs) laser was used to ablate openings on a capillary tube for gas passage to the FP cavity. A fusion hole was also drilled on the end face of a SMF by fs laser. The sensitivity of the sensor is enhanced due to Vernier effect. Experimental results show that the sensitivity was as high as 86.64 nm/MPa in the range of 0~0.6 MPa, which is 32.8 times larger than that of an open-cavity EFPI sensor without Vernier effect. The temperature cross-sensitivity of the sensor was measured to be about 5.18 KPa/°C. The proposed sensor was characterized by its high sensitivity, compact structure and ease of fabrication, and would have extensive application prospects in gas sensing fields.

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An Optical Fiber Fabry–Perot Pressure Sensor with Optimized Thin Microbubble Film Shaping for Sensitivity Enhancement

Coatings ◽

10.3390/coatings10040358 ◽

2020 ◽

Vol 10 (4) ◽

pp. 358 ◽

Cited By ~ 1

Author(s):

Shubin Zhang ◽

Zhenjun Shao ◽

Jinrong Liu ◽

Meixue Zong ◽

Jian Shen ◽

...

Keyword(s):

Thin Film ◽

Arc Discharge ◽

Structural Parameters ◽

Silicon Film ◽

Glass Tube ◽

High Sensitivity ◽

Single Mode ◽

Single Mode Fiber ◽

Fabry Perot ◽

Micrometer Scale

A pressure-assisted arc discharge method of preparing silicon microbubbles with a glass tube was utilized for decreasing the bubble film’s thickness and improving the bubble’s uniformity. By controlling the arc discharge intensity, discharge time and the position of the fiber carefully, the thickness of the microbubble film was reduced to the micrometer scale. Later, the thin film of the microbubble was transferred to the end the single-mode-fiber/glass-tube structure, for forming the FP (Fabry–Perot) interference cavity. As the thin film is sensitive to the outer pressure, such a configuration could be used for a high-sensitive-pressure measurement. Experimental results show that the sensitivity of this FP (Fabry–Perot) cavity was 6790 pm/MPa when the outer pressure ranges from 100 to 1600 kPa, and the relationship between the structural parameters of the thin film and the outer pressure was theoretically analyzed. Moreover, this special structure made of the end silicon film microbubble is more suitable for high-sensitivity applications.

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