Incident polarization angle and temperature dependence of polarization and spectral response characteristics in optical fiber couplers

1991 ◽  
Vol 30 (9) ◽  
pp. 1062 ◽  
Author(s):  
Yoshinori Namihira ◽  
Toshio Kawazawa ◽  
Hiroharu Wakabayashi
Keyword(s):  
Optical Fiber ◽  
Temperature Dependence ◽  
Spectral Response ◽  
Polarization Angle ◽  
Response Characteristics ◽  
Incident Polarization

scholarly journals The temperature dependence of gradient system response characteristics

2019 ◽  
Vol 83 (4) ◽  
pp. 1519-1527 ◽  
Author(s):  
Manuel Stich ◽  
Christiane Pfaff ◽  
Tobias Wech ◽  
Anne Slawig ◽  
Gudrun Ruyters ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
System Response ◽  
Gradient System ◽  
Response Characteristics

Structure optimization of gold-sputtered side-polished U-shaped plastic optical fiber SPR sensor

Sensor Review ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jianxing Jian Gu ◽  
Chen Yu ◽  
ZhenZe Yang ◽  
Peng Xue ◽  
Ning Jing ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Conflicts Of Interest ◽  
Spectral Response ◽  
Plastic Optical Fiber ◽  
Fiber Sensors ◽  
Content Type ◽  
Sensor Optimization ◽  
Fiber Sensing ◽  
Optical Fiber Sensing ◽  
Practical Implications

Purpose This study aims to optimize the structure of gold-sputtered U-shaped plastic fiber sensors. Design/methodology/approach A group of U-shaped Au-sputtered plastic optical fiber sensing probes with polishing angles of 45°, 90° and 135° is prepared. Findings The experimental results show that the spectral response and sensitivity of the sensor at 45°polishing angle is twice that of the sensor at 90°. Research limitations/implications Due to the limitations of laboratory temperature and equipment, the overall effect has not reached the ideal, but the expected effect has been obvious. Experiments also optimize the sensor. Practical implications Optical fiber sensing has always been an indispensable part of various fields. Social implications Sensor optimization is of great help to the progress of technology and the development of science and technology. Originality/value The authors have no conflicts of interest to disclose.

Temperature Dependence of a Refractive Index Sensor Based on Side-Polished Macrobending Plastic Optical Fiber

2016 ◽  
Vol 16 (2) ◽  
pp. 355-358 ◽  
Author(s):  
Ning Jing ◽  
Chuanxin Teng ◽  
Fangda Yu ◽  
Guanjun Wang ◽  
Jie Zheng
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Temperature Dependence ◽  
Refractive Index Sensor ◽  
Plastic Optical Fiber

Numerical Analysis of Thermal Dependence of the Spectral Response of Polymer Optical Fiber Bragg Gratings

2016 ◽  
Vol 12 (1) ◽  
pp. 85-95 ◽  
Author(s):  
Hisham Hisham
Keyword(s):  
Optical Fiber ◽  
High Stability ◽  
Spectral Response ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Bragg Reflector ◽  
Polymer Optical Fiber ◽  
Thermal Dependence ◽  
Silica Optical Fiber ◽  
Index Modulation

The thermal dependence of the spectral response (i.e. transmission, reflection and time delay ( r) responses) of uniform polymer optical fiber (POF) Bragg gratings has been investigated. In addition to the temperature dependence, the effects of grating strength (kLg) and fiber index modulation ( n) have been investigated. Besides high capability of tunable wavelength due to the unique large and negative thermo-optic coefficient of POF, the spectral response for POF Bragg gratings show high stability and larger spectrum bandwidth with temperature variation compare with the silica optical fiber (SOF) Bragg gratings, especially with the increase of the kLg value. It was found that by increasing kLg, the peak reflectance value increases and the bandwidth of the Bragg reflector become narrower. Also it’s shown by increasing the kLg value, r deceasing significantly and reach its minimum value at the designed wavelength ( B). Furthermore, the r for POF Bragg gratings is less than that for SOF Bragg gratings at the same value of kLg. Also it’s found that the peak reflectivity value increases to around 60% when the n value increases from 1*10-4 to 5*10-4.

Two-dimensional a-Si:H/a-SiC:H n-i-p sensor array with ITO/a-SiNx antireflection coating

2005 ◽  
Vol 862 ◽  
Author(s):  
Yu. Vygranenko ◽  
J. H. Chang ◽  
A. Nathan
Keyword(s):  
Reverse Bias ◽  
Spectral Response ◽  
Charge Trapping ◽  
Optical Excitation ◽  
Antireflection Coating ◽  
Two Dimensional ◽  
Device Structure ◽  
Response Characteristics ◽  
Photodiode Array

AbstractThis paper presents a two-dimensional a–Si:H/a-SiC:H n–i–p photodiode array with switching diode readout, developed specifically for fluorescence-based bio-assays. Both device structure and fabrication processing has enabled enhancement of the external quantum efficiency of the encapsulated device up to 80%, reduction of the photodiode leakage down to 10 pA/cm2 at -1V reverse bias, and increase of the rectification current ratio of the switching diodes up to 109. The critical fabrication issues associated with deposition of device-quality materials, tailoring of defects at the i–p interface, device patterning with dry etching, junction passivation, and contact formation will be discussed. Both sensing and switching diodes were characterized. While the observed dark current in the photodiodes at low reverse bias voltages is primarily due to carrier emission from deep states in the a–Si:H bulk, the leakage in the small switching diodes stems from peripheral defects along junction sidewalls. Optical losses in the photodiodes with ITO/a–SiNx:H antireflection coating were evaluated using numerical modeling, and the calculated transmission spectra correlated well with the spectral response characteristics. Measurements of the charge transfer time and output linearity demonstrated the efficiency of the single-switching diode readout configuration. The response of the array to optical excitation was also investigated. The observed long term retardation in the signal rise and decay at illumination levels less than 1010 photons/cm2-s can be associated with charge trapping in the undoped layer.

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