Single-Mode Fiber Refractive Index Sensor Based on Core-Offset Attenuators
Reads0
Chats0
TLDR
In this paper, a fiber Michelson interferometer refractive index (RI) sensor with a single core-offset attenuator and a layer of ~ 500-nm gold coating was demonstrated.Abstract:
Mach-Zehnder and Michelson interferometers using core-offset attenuators were demonstrated. As the relative offset direction of the two attenuators in the Mach-Zehnder interferometer can significantly affect the extinction ratio of the interference pattern, single core-offset attenuator-based sensors appear more robust and repeatable. A novel fiber Michelson interferometer refractive index (RI) sensor was subsequently realized by a single core-offset attenuator and a layer of ~ 500-nm gold coating. The device had a minimum insertion loss of 0.01 dB and maximum extinction ratio over 9 dB. The sensitivity (0.333 nm) of the new sensor to its surrounding RI change (0.01) was found to be comparable to that (0.252 nm) of an identical long period gratings pair Mach-Zehnder interferometric sensor, and its ease of fabrication makes it a low-cost alternative to existing sensing applications.read more
Citations
More filters
Journal ArticleDOI
Interferometric Fiber Optic Sensors
Byeong Ha Lee,Youngho Kim,Kwan Seob Park,Joo Beom Eom,Myoung Jin Kim,Byung Sup Rho,Hae Young Choi +6 more
TL;DR: Each type of interferometric sensor is reviewed in terms of operating principles, fabrication methods, and application fields and some specific examples of recently reported interferometeric sensor technologies are presented in detail to show their large potential in practical applications.
Journal ArticleDOI
Optical Refractive Index Sensors with Plasmonic and Photonic Structures: Promising and Inconvenient Truth
Yi Xu,Yi Xu,Ping Bai,Xiaodong Zhou,Yuriy Akimov,Ching Eng Png,Lay Kee Ang,Wolfgang Knoll,Lin Wu +8 more
TL;DR: In this paper, the authors focus on optical refractive index (RI) sensors with no fluorescent labeling required, and utilize two parameters to characterize and compare the performance of optical RI sensors: sensitivity to RI change (denoted by symbol SRI) and figure of merit (in short, FoM).
Journal ArticleDOI
Compact fiber-optic curvature sensor based on super-mode interference in a seven-core fiber.
G. Salceda-Delgado,A. Van Newkirk,Jose Enrique Antonio-Lopez,Alejandro Martinez-Rios,Axel Schülzgen,R. Amezcua Correa +5 more
TL;DR: A compact, low loss, and highly sensitive optical fiber curvature sensor is presented, which allows for using either visibility or spectral shift for sensor interrogation when the device is bent.
Journal ArticleDOI
Refractive index sensing based on Mach–Zehnder interferometer formed by three cascaded single-mode fiber tapers
TL;DR: A highly sensitive refractive index (RI) sensor based on three cascaded single-mode fiber tapers, in which a weak taper is sandwiched between the two tapers to improve the sensitivity of the sensor.
Journal ArticleDOI
Ultrastable in reflection photonic crystal fiber modal interferometer for accurate refractive index sensing
TL;DR: In this paper, a compact in reflection modal interferometer consisting of a stub of large-mode area photonic crystal fiber (PCF) spliced to standard fiber is presented.
References
More filters
Journal ArticleDOI
Analysis of the response of long period fiber gratings to external index of refraction
TL;DR: In this article, the authors demonstrate that the change in wavelength of a long period fiber grating attenuation band with changes in external index of refraction can be enhanced by proper selection of the grating period.
Journal ArticleDOI
Refractive Index Sensing With Mach–Zehnder Interferometer Based on Concatenating Two Single-Mode Fiber Tapers
Zhaobing Tian,Scott S.-H. Yam,Jack A. Barnes,Wojtek J. Bock,P. Greig,James M. Fraser,Hans-Peter Loock,Richard D. Oleschuk +7 more
TL;DR: In this paper, a fiber Mach-Zehnder interferometer was realized by concatenating two singlemode fiber tapers separated by a middle section, which had a minimum insertion loss of 3 dB and maximum interferometric extinction ratio over 20 dB.
Journal ArticleDOI
Refractive index sensor based on an abrupt taper Michelson interferometer in a single-mode fiber
TL;DR: A simple refractive index sensor based on a Michelson interferometer in a single-mode fiber is constructed and demonstrated, and its ease of fabrication offers a low-cost alternative to current sensing applications.
Journal ArticleDOI
Fiber-taper seeded long-period grating pair as a highly sensitive refractive-index sensor
TL;DR: In this paper, the fabrication and characterization of a highly sensitive refractive index sensor based on a long-period grating (LPG) pair with a fiber-taper section in between was reported.
Journal ArticleDOI
Analysis of etched long-period fibre grating and its response to external refractive index
TL;DR: In this article, the authors presented analytical formulas to describe the shift in the resonance wavelength of a long-period fiber grating in response to etching of the fiber cladding or a change in the external refractive index.