Temporal response and sensing properties of reflected light for a rectangular laser pulse incident to a Fabry-Perot interferometer

2018 ◽  
Author(s):  
Yuan Fa ◽  
Shichao Xu ◽  
Mingshi Luo ◽  
Lu Zhang
Keyword(s):  
Laser Pulse ◽  
Temporal Response ◽  
Sensing Properties ◽  
Reflected Light ◽  
Fabry Perot

Sensing properties of intrinsic Fabry-Perot interferometers in fiber tapers

2012 ◽  
Author(s):  
Xiaobei Zhang ◽  
Jinlong Li ◽  
Yang Li ◽  
Wenyuan Wang ◽  
Fufei Pang ◽  
...  
Keyword(s):  
Sensing Properties ◽  
Fabry Perot

scholarly journals Study of Utilization of Embedded Metal Nanoparticles in Dielectric Thin Film for Humidity Sensing

2019 ◽  
Vol 10 (2) ◽  
pp. 155-161
Author(s):  
Hala J. El-Khozondar ◽  
Waleed S. Mohammed
Keyword(s):  
Metal Nanoparticles ◽  
Theoretical Study ◽  
Dynamic Range ◽  
Volume Fraction ◽  
Dielectric Thin Film ◽  
Reflected Light ◽  
Metal Type ◽  
Reflection Peak ◽  
Fabry Perot ◽  
Film Interface

Abstract This paper presents a theoretical study of the utilization of the shift in the reflection peak of the thin dielectric film with embedded metal nanoparticles (NPs) towards humidity and vapor applications. The presence of the NPs in the film results in a complex effective index. Hence, the reflected light at the superstrate-film interface causes a phase shift when the index of the surrounding is changed. This alters the reflected spectrum of the formed Fabry-Perot, for both the reflection peak wavelength and intensity. Here, the dynamic range of the proposed sensor is optimized through the variation of the film thickness and nanoparticle metal type, as well as the volume fraction.

scholarly journals Hybrid Fiber Optic Sensor, Based on the Fabry–Perot Interference, Assisted with Fluorescent Material for the Simultaneous Measurement of Temperature and Pressure

Sensors ◽  
2019 ◽  
Vol 19 (5) ◽  
pp. 1097 ◽  
Author(s):  
Xiaofeng Jiang ◽  
Chun Lin ◽  
Yuanqing Huang ◽  
Kan Luo ◽  
Jianhuan Zhang ◽  
...  
Keyword(s):  
Electromagnetic Interference ◽  
Fiber Optic ◽  
Low Cost ◽  
Fiber Optic Sensor ◽  
Temperature Sensitive ◽  
Length Variation ◽  
Excitation Light ◽  
Light Emitting ◽  
Reflected Light ◽  
Fabry Perot

Herein we design a fiber sensor able to simultaneously measure the temperature and the pressure under harsh conditions, such as strong electromagnetic interference and high pressure. It is built on the basis of the fiber-optic Fabry–Perot (F–P) interference and the temperature sensitive mechanism of fluorescent materials. Both halogen lamps and light-emitting diodes (LED) are employed as the excitation light source. The reflected light from the sensor contains the low coherent information of interference cavity and the fluorescent lifetime. This information is independent due to the separate optical path and the different demodulation device. It delivers the messages of pressure and temperature, respectively. It is demonstrated that the sensor achieved pressure measurement at the range of 120–400 KPa at room temperature with a sensitivity of 1.5 nm/KPa. Moreover, the linearity of pressure against the cavity length variation was over 99.9%. In the meantime, a temperature measurement in the range of 25–80 °C, with a sensitivity of 0.0048 ms/°C, was obtained. These experimental results evince that this kind of sensor has a simple configuration, low-cost, and easy fabrication. As such, it can be particularly applied to many fields.

Nonlinear electro-optic Fabry–Perot devices using reflected-light feedback

1978 ◽  
Vol 2 (3) ◽  
pp. 55 ◽  
Author(s):  
P. W. Smith ◽  
E. H. Turner ◽  
B. B. Mumford
Keyword(s):  
Reflected Light ◽  
Electro Optic ◽  
Fabry Perot

SELF-OSCILLATIONS OF AN OPTICALLY BISTABLE ELEMENT WITH VERY BROAD HYSTERESIS IN A HYBRID RING CAVITY

1992 ◽  
Vol 02 (04) ◽  
pp. 861-872 ◽  
Author(s):  
J. GROHS ◽  
F. ZHOU ◽  
H. IßLER ◽  
C. KLINGSHIRN
Keyword(s):  
Ring Cavity ◽  
Thermal Relaxation ◽  
Optical Nonlinearity ◽  
Light Signal ◽  
Thermally Induced ◽  
Large Numbers ◽  
Tree Construction ◽  
Reflected Light ◽  
Fabry Perot ◽  
Hybrid Ring

We investigate thermally induced optical nonlinearity of a glass doped with semiconductor quantum dots. With the feedback of a Fabry-Perot resonator this glass shows dispersive optical bistability. The reflected light signal is coupled to a hybrid ring cavity with a round trip time much longer than that of the Fabry-Perot resonator and even longer than the thermal relaxation time of the glass. The self-oscillations occurring for certain input parameters are regular and the appearance of different modes as a function of the light intensity coupled to the resonator is observed. Due to the broad hysteresis and the high inclination of both branches of the bistable loop we observe large numbers of ascending and descending steps in the output intensity, i.e., long oscillation periods. A simple model of adiabatic simulations by an iterated map shows that the mode structure follows a Farey-tree construction.

Detection at a distance of laser-generated ultrasound using a confocal Fabry–Perot interferometer

1986 ◽  
Vol 64 (9) ◽  
pp. 1320-1323 ◽  
Author(s):  
Jean-Pierre Monchalin
Keyword(s):  
Laser Pulse ◽  
Doppler Shift ◽  
Steel Plate ◽  
Solid Sample ◽  
Experimental Results ◽  
Fabry Perot ◽  
Frequency Stabilized Laser

A novel scheme to detect ultrasonic motion at the surface of a solid sample is presented. The surface of the sample is illuminated by a frequency-stabilized laser and the light scattered by the surface is received by a confocal Fabry–Perot interferometer, which demodulates the Doppler shift produced by ultrasound. Experimental results, obtained at a distance of 1.5 m from a machined but not polished steel plate, and excited by ultrasound produced by a laser pulse, are presented.

Sign in / Sign up

Export Citation Format

Share Document