scholarly journals Simple and reliable light launch from a conventional single-mode fiber into a helical-core fiber through an adiabatically tapered splice

2012 ◽  
Vol 20 (23) ◽  
pp. 25562 ◽  
Author(s):  
Hyuntai Kim ◽  
Jongki Kim ◽  
Yongmin Jung ◽  
Luis Alonso Vazquez-Zuniga ◽  
Seung Jong Lee ◽  
...  
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Core Fiber

Fiber-optic Michelson interferometer based on α-Fe2O3/ZrO2 sensing membrane and its application in trace fluoride-ion detection

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Zizheng Yue ◽  
Wenlin Feng
Keyword(s):  
Silver Film ◽  
Fiber Optic ◽  
Michelson Interferometer ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Ion Concentration ◽  
Fluoride Ion ◽  
Ion Detection ◽  
Core Fiber ◽  
Sensing Membrane

Abstract In this work, a fiber-optic fluoride-ion-detection Michelson interferometer based on the thin-core fiber (TCF) and no-core fiber (NCF) coated with α-Fe2O3/ZrO2 sensing film is proposed and presented. The single-mode fiber (SMF) is spliced with the TCF and NCF in turn, and a waist-enlarged taper is spliced between them. Then, a silver film is plated on the end face of NCF to enhance the reflection. After the absorption of fluoride ion by the sensing film, the effective refractive index (RI) of the coated cladding will change, which leads to the regular red shift of the interference dip with the increasing fluoride-ion concentration. Thus, the fluoride-ion concentrations can be determined according to the corresponding dip wavelength shifts. The results show that the sensor has an excellent linear response (R 2 = 0.995) with good sensitivity (8.970 nm/ppm) when the fluoride-ion concentration is in the range of 0–1.5 ppm. The response time is about 15 s. The sensor has the advantage of good selectivity, good temperature and pH stabilities, and can be applied to detect fluoride ion effectively.

Michelson liquid-level sensor based on cascaded no-core fiber and single-mode fiber structure

Optik ◽  
2020 ◽  
Vol 206 ◽  
pp. 163746 ◽  
Author(s):  
Dejiu Feng ◽  
Min Liu ◽  
Wenlin Feng ◽  
Bangxing Li
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Liquid Level ◽  
Fiber Structure ◽  
Level Sensor ◽  
Core Fiber ◽  
Liquid Level Sensor

Design of 125 μm cladding multi-core fiber with full-band compatibility to conventional single-mode fiber

2015 ◽  
Author(s):  
Takashi Matsui ◽  
Taiji Sakamoto ◽  
Yukihiro Goto ◽  
Kotaro Saito ◽  
Kazuhide Nakajima ◽  
...  
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Full Band ◽  
Core Fiber

Temperature-insensitive intensity-modulation liquid refractive index sensor based on fiber-optic Michelson probe structure

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Chen Zheng ◽  
Wenlin Feng ◽  
Xiaozhan Yang ◽  
Guojia Huang ◽  
Lian Wang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Beam Propagation Method ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Intensity Change ◽  
Refractive Index Sensor ◽  
Silver Mirror ◽  
Core Fiber ◽  
Core Modes ◽  
Theoretical Results

Abstract A novel liquid refractive index sensor based on the connected single-mode fiber (SMF), no-core fiber (NCF), four-core fiber (FCF), and silver mirror (SM) to form an SMF–NCF–FCF–SM Michelson probe structure is proposed and fabricated. The change of light field in the probe structure has been simulated by the light-beam propagation method. The theoretical results show that light is excited in the NCF and couples into the cores and cladding of FCF at the junction of NCF and FCF. The interference fringes are generated between the cladding modes and core modes of FCF. The sensitivities of the probe in NaCl, sucrose, and glycerol are 171.75 dB/RIU, 121.41 dB/RIU, and 207.50 dB/RIU, respectively. The temperature sensitivity is 0.05 nm/°C, and the intensity change of temperature (≤0.046 dB/°C) is very small and has little effect on the liquid refractive index. Thus, the cross-sensitivity of temperature for the liquid refractive index can be removed. The proposed probe structure has the advantages of easy fabrication, good stability, and linear response, having potential application in the liquid refractive index monitoring environments.

Long-period grating based single-mode fiber to multi-core fiber pump coupler

2020 ◽  
Author(s):  
Liliana M. Sousa ◽  
Margarida Facão ◽  
Gil M. Fernandes ◽  
Rogério N. Nogueira ◽  
Ana M. Rocha
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Long Period Grating ◽  
Long Period ◽  
Core Fiber

Pure Single Mode Output of Six-Core Fiber Laser Based on Single-Mode Fiber Mode Selection

2011 ◽  
Vol 38 (8) ◽  
pp. 0802002
Author(s):  
张晓磊 Zhang Xiaolei ◽  
彭刚定 Peng Gangding ◽  
张行愚 Zhang Xingyu ◽  
王青圃 Wang Qingpu ◽  
常军 Chang Jun
Keyword(s):  
Fiber Laser ◽  
Mode Selection ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Fiber Mode ◽  
Core Fiber

A Coupling Method from Hollow-Core Fiber with Large Core Diameter to Single Mode Fiber

2019 ◽  
Author(s):  
Xiang Chen ◽  
Xiongwei Hu ◽  
Lvyun Yang ◽  
J inggang Peng ◽  
Haiqing Li ◽  
...  
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Coupling Method ◽  
Hollow Core ◽  
Large Core ◽  
Core Diameter ◽  
Core Fiber

scholarly journals Splicing and Coupling Losses in Hollow-Core Photonic Crystal Glass Fibers

2010 ◽  
Vol 161 ◽  
pp. 43-49 ◽  
Author(s):  
J.P. Carvalho ◽  
F. Magalhães ◽  
O. Frazão ◽  
J.L. Santos ◽  
F.M. Araújo ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Gas Sensing ◽  
Glass Fibers ◽  
Effective Diffusion ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Crystal Glass ◽  
Hollow Core ◽  
Sensing Applications ◽  
Core Fiber

Hollow-core photonic crystal glass fibers have a high potential for gas sensing applications, since large light-gas interaction lengths can be effectively attained. Nevertheless, in order to enhance effective diffusion of gas into the hollow-core fiber, multi-coupling gaps are often needed, which raise coupling loss issues that must be evaluated prior to the development of practical systems. In this paper, a study on the coupling losses dependence on lateral and axial gap misalignment for single-mode fiber and two different types of hollow-core photonic crystal glass fibers is carried out. In addition, an experimental technique on splicing these glass fibers is also described and some results are presented showing that low splice losses can be obtained with high reproducibility.

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