scholarly journals Macrobending Loss Analysis on Singlemode-Multimode-Singlemode Fiber Optic Core

2019 ◽  
Vol 9 (2) ◽  
pp. 11-15
Author(s):  
Sisca Arisya Harry Andhina
Keyword(s):  
Light Source ◽  
Optical Fibers ◽  
Fiber Optic ◽  
Optical Power ◽  
Single Mode ◽  
Fiber Optic Cable ◽  
Power Meter ◽  
Loss Analysis ◽  
Measurement Results ◽  
Source Test

Macrobending often occurs in optical fibers that embedded in the ground due to shifting of soil or rocks in the ground causing interference in transmission. In this study used single-mode-multimode-singlemode fiber optic cable connected manually and axially measured using a light source test equipment and optical power meter and the results will be compared. The measurement results obtained the greater  value of macrobending losses with the smaller the diameter of the winding, and the greater the number of turns. The highest value of macrobending losses in multimode cables is -1.48dB at 0.5cm diameter with 5 turns, highest value of macrobending losses on single mode cables is -12.73dB at 0.5cm diameter with 5 turns,  lowest value of macrobending losses for multimode cables is -0.44dB at 5cm diameter with 1 twist, lowest macrobending losses in singlemode cables is -1.69dB at 5cm diameter with 1 twist. While the value of macrobending losses on axially connected SMS cables shows the highest value of macrobending losses on multimode cables is -1.12dB in diameter of 0.5cm with 5 turns,  highest value of macrobending losses on singlemode cables is -1.18dB at diameter of 0.5cm with 5 turns,  lowest value for macrobending losses on multimode cables is -0.66dB at 5cm in diameter with 1 twist, the smallest value for macrobending losses on singlemode cables is -0.27dB at 5cm diameter with 1 twist . The measurement results also showed that the macrobending losses of manually connected SMS cables were greater than the macrobending losses of axially connected SMS cables.

scholarly journals Analysis of Curvature in Fiber Optic Cable for Macrobending-Based Slope Sensor

2021 ◽  
Vol 3 (1) ◽  
pp. 45-56
Author(s):  
Imam Mulyanto
Keyword(s):  
Fiber Optics ◽  
Optical Fibers ◽  
Fiber Optic ◽  
Laser Light ◽  
Laser Intensity ◽  
Single Mode ◽  
Power Losses ◽  
Fiber Optic Cable ◽  
Power Meter ◽  
Working Principle

The analysis of fiber optics for macro bending-based slope sensors using SMF-28 single-mode optical fibers has been successfully conducted. Fiber optics were treated to silicon rubber molding and connected with laser light and power meters to measure the intensity of laser power generated. The working principle was carried out using the macrobending phenomenon on single-mode optical fibers. The intensity of laser light in fiber optic cables decreases in the event of indentation or bending of the fiber optic cable. Power losses resulting from the macrobending process can be seen in the result of the information sensitivity of fiber optics to the change of angle given. From the results of the study, the resulting fiber optic sensitivity value is -0.1534o/dBm. The larger the angle given, the lower the laser intensity received by the power meter.

scholarly journals Curvature Analysis in Fiber Optic Cables as a Tilt Sensor Based on Macro Bending

2020 ◽  
Vol 2 (2) ◽  
pp. 91-99
Author(s):  
Imam Mulyanto
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Fiber Optic ◽  
Laser Light ◽  
Single Mode ◽  
Fiber Optic Cable ◽  
Power Meter ◽  
Curvature Analysis ◽  
Bending Process ◽  
Tilt Sensor

The test has been successfully carried out on optical fibers to be used as a macrobending tilt sensor using SMF-28 single mode optical fiber. The optical fiber was molded with silicon rubber, then connected to a laser light and a power meter to see the intensity of the laser power produced. The principle is carried out using the macro bending phenomenon on single mode optical fibers, where the laser light intensity in the fiber optic cable will decrease if there is a bend or bending in the fiber optic cable. We can observe the power loss resulting from the macro bending process to find out how sensitive the optical fiber is to changes in a given angle. The resulting optical fiber sensitivity value is -0.1534o/dBm.

scholarly journals Desain sensor massa menggunakan metode macrobending fiber optic

JURNAL ELTEK ◽  
2021 ◽  
Vol 19 (1) ◽  
pp. 52
Author(s):  
Mochammad Junus ◽  
Yoyok Heru Prasetyo
Keyword(s):  
Optical Fiber ◽  
Light Source ◽  
Data Transmission ◽  
Fiber Optic ◽  
Measurement Data ◽  
Optical Power ◽  
Sensor Data ◽  
Mass Sensor ◽  
Pressure Losses ◽  
Power Meter

Kecepatan dalam hal pengiriman data dan komunikasi merupakan hal terus menerus harus diperbaiki dalam era ini. Beberapa permasalahan dapat timbul karena adanya keterlambatan pengiriman data baik itu bertujuan untuk komunikasi atau pengiriman data pengukuran untuk keperluan tertentu. Salah satu solusi yang dapat di lakukan adalah dengan menggunakan fiber optik. Fiber optik kerap digunakan karena keunggulannya dalam kecepatannya dalam hal komunikasi dan pengiriman data. Saat ini, selain untuk berkomunikasi, fiber optik juga banyak dikembangkan di berbagai keperluan. Salah satunya adalah dalam pengiriman data sensor. Penelitian ini mengangkat topik permasalahan yaitu bagaimana mendesain sebuah sensor massa, dengan menggunakan fiber optik sebagai sensor massa dengan memanfaatkan metode macrobending. Kabel yang digunakan pada penelitian ini menggunakan tipe patch core singlemode FC to FC yang dililit dengan variasi 1,3,5,7, dan 9 kali lilitan pada selang elastis berdiamter ¼ inchi, ½ inchi, 5/8 inchi, ¾ inchi dan 1 inchi dengan massa 0,1 Kg- 10 Kg dengan range 200gram. Untuk input menggunkan OLS (Optical light Source) dengan nilai -7 dBm dan nilai output di terima dan dibaca oleh OPM (Optical Power Meter). Dari hasil pengukuran diperoleh nilai daya output, loss, losses macrobending, dan rugi-rugi tekanan. Dari penelitian ini, hasil yang didapatkan adalah sebuah rumus matematis hubungan antara beban atau massa dengan rugi-rugi tekanan pada kabel fiber optik. Speed ​​in terms of data transmission and communication is something that must continuously be improved in this era. Several problems can arise due to delays in sending data, either for communication purposes or for sending measurement data for certain purposes. One solution that can be done is to use optical fiber. Optical fiber is often used because of its superiority in speed in terms of communication and data transmission. Currently, in addition to communicating, optical fiber is also being developed for various purposes. One of them is in sending sensor data. This research raises the topic of the problem, namely how to design a mass sensor, using optical fiber as a mass sensor by utilizing the macrobending method. The cables used in this study used a single patch core type FC to FC wrapped with variations of 1,3,5,7, and 9 turns on elastic hoses with diameters of ¼ inch, ½ inch, 5/8 inch, ¾ inch and 1 inch. with a mass of 0.1 kg - 10 kg with a range of 200 grams. For input using an OLS (Optical light Source) with a value of -7 dBm and the output value is received and read by the OPM (Optical Power Meter). From the measurement results obtained the value of output power, loss, macrobending losses, and pressure losses. From this research, the results obtained are a mathematical formula for the relationship between load or mass and pressure losses on fiber optic cables.

Optical Fiber Loop Sensors for Structural Health Monitoring of Composites

2008 ◽  
Vol 1129 ◽  
Author(s):  
Nguyen Q Nguyen ◽  
Nikhil Gupta
Keyword(s):  
Structural Health Monitoring ◽  
Optical Fiber ◽  
Optical Fibers ◽  
Health Monitoring ◽  
Fiber Optic ◽  
Optical Power ◽  
Single Mode ◽  
Radius Of Curvature ◽  
Fiber Sensors ◽  
Structural Health

AbstractIn the present work a fiber-optic loop-sensor is designed and tested for possible applications in structural health monitoring of composite materials. It is known that bending an optical fiber beyond a critical curvature leads to loss of optical power through the curved region. The optical power loss depends on the radius of curvature of the loop. The optical power can be measured by a photodetector and a change in the power due a change to the curvature can be measured. In the present research optical fiber-optic loop-sensors are developed that can exploit this concept. Single-mode optical fiber sensors having different loop radii, from 6-10 mm, are fabricated and calibrated for applied strain on the loop. The calibration is carried out using a 0.098 N load cell and a computer controlled translation stage having 50 nm step resolution. Results show that the sensors provide highly repeatable curves for loading and unloading cycles. Smaller loop radii lead to higher optical power losses, resulting in higher sensitivity. Calibration results show that such sensors can be used in structural health monitoring applications. In this approach the coating and cladding of optical fibers are maintained intact; therefore, the sensors are robust and can withstand several composites fabrication processes.

scholarly journals Sensing, Actuation, and Control of the SmartX Prototype Morphing Wing in the Wind Tunnel

Actuators ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 107
Author(s):  
Nakash Nazeer ◽  
Xuerui Wang ◽  
Roger M. Groves
Keyword(s):  
Wind Tunnel ◽  
Optical Fibers ◽  
Fiber Optic ◽  
Experimental Testing ◽  
Single Mode ◽  
Fiber Optic Sensor ◽  
Sensor Data ◽  
Random Errors ◽  
Morphing Wing ◽  
Actuator Dynamics

This paper presents a study on trailing edge deflection estimation for the SmartX camber morphing wing demonstrator. This demonstrator integrates the technologies of smart sensing, smart actuation and smart controls using a six module distributed morphing concept. The morphing sequence is brought about by two actuators present at both ends of each of the morphing modules. The deflection estimation is carried out by interrogating optical fibers that are bonded on to the wing’s inner surface. A novel application is demonstrated using this method that utilizes the least amount of sensors for load monitoring purposes. The fiber optic sensor data is used to measure the deflections of the modules in the wind tunnel using a multi-modal fiber optic sensing approach and is compared to the deflections estimated by the actuators. Each module is probed by single-mode optical fibers that contain just four grating sensors and consider both bending and torsional deformations. The fiber optic method in this work combines the principles of hybrid interferometry and FBG spectral sensing. The analysis involves an initial calibration procedure outside the wind tunnel followed by experimental testing in the wind tunnel. This method is shown to experimentally achieve an accuracy of 2.8 mm deflection with an error of 9%. The error sources, including actuator dynamics, random errors, and nonlinear mechanical backlash, are identified and discussed.

scholarly journals High-Sensitivity Fiber-Optic Ultrasound Sensors for Medical Imaging Applications

1998 ◽  
Vol 20 (2) ◽  
pp. 103-112 ◽  
Author(s):  
H. Wen ◽  
D.G. Wiesler ◽  
A. Tveten ◽  
B. Danver ◽  
A. Dandridge
Keyword(s):  
Medical Imaging ◽  
Optical Fibers ◽  
Electromagnetic Interference ◽  
Fiber Optic ◽  
High Sensitivity ◽  
Single Mode ◽  
Piezoelectric Sensors ◽  
Single Element ◽  
Bending Radius ◽  
Laser Interferometers

This paper presents several designs of high-sensitivity, compact fiber-optic ultrasound sensors that may be used for medical imaging applications. These sensors translate ultrasonic pulses into strains in single-mode optical fibers, which are measured with fiber-based laser interferometers at high precision. The sensors are simpler and less expensive to make than piezoelectric sensors, and are not susceptible to electromagnetic interference. It is possible to make focal sensors with these designs, and several schemes are discussed. Because of the minimum bending radius of optical fibers, the designs are suitable for single element sensors rather than for arrays.

Automated Fiber-Optic System for Monitoring the Stability of the Pit Quarry Mass and Dumps

2021 ◽  
pp. 19-26
Author(s):  
А.D. Меkhtiyev ◽  
◽  
E.G. Neshina ◽  
P.Sh. Madi ◽  
D.A. Gorokhov ◽  
...  
Keyword(s):  
Rock Mass ◽  
Optical Fiber ◽  
Optical Fibers ◽  
Fiber Optic ◽  
Light Wave ◽  
Single Mode ◽  
Fiber Optic Sensors ◽  
Fiber Optic Sensor ◽  
Laboratory Sample ◽  
Single Mode Optical Fiber

This article ls with the issues related to the development of a system for monitoring the deformation and displacement of the rock mass leading to the collapse of the quarry sides. Monitoring system uses point-to-point fiber-optic sensors. Fiber-optic sensors and control cables of the communication line are made based on the single mode optical fibers, which allows to measure with high accuracy the deformations and displacements of the rock mass at a distance of 30-50 km. To create fiber-optic pressure sensors, an optical fiber of the ITU-T G. 652.D standard is used. Laboratory sample is developed concerning the point fiber-optic sensor made based on the two-arm Mach-Zender interferometer using a single mode optical fiber for monitoring strain (displacements) with a change in the sensitivity and a reduced influence of temperature interference leading to zero drift. The article presents a mathematical apparatus for calculating the intensity of radiation of a light wave passing through an optical fiber with and without mechanical stress. A laboratory sample of single mode optical fibers based on the Mach-Zender interferometer showed a fairly high linearity and accuracy in the measurement and can be used to control the strain of the mass after appropriate refinement of its design. Mathematical expressions are also given for determining the intensity of the light wave when the distance between the fixing points of a single mode optical fiber changes depending on the change in the external temperature. A diagram for measuring strain using a point fiber-optic strain sensor is developed. Hardware and software package is developed, which can be used to perform a number of settings of measuring channels. The work is aimed at solving the production problems of the Kenzhem quarry of AK Altynalmas JSC.

Single-mode fiber optic cable for space applications

1992 ◽  
Author(s):  
Vasilios E. Kalomiris ◽  
Peter A. Michaels, Jr. ◽  
Anne E. Miller ◽  
Man F. Yan
Keyword(s):  
Fiber Optic ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Fiber Optic Cable ◽  
Space Applications

scholarly journals Método aproximado para determinar la potencia óptica en una linterna fotónica

2019 ◽  
pp. 23-29
Author(s):  
Patricia Ixchel Palma-Arguello ◽  
Grethell Georgina Pérez-Sánchez ◽  
Fernando Martínez-Piñón ◽  
Genaro Hernández-Valdez
Keyword(s):  
Output Power ◽  
Optical Fibers ◽  
Numerical Approximation ◽  
Near Infrared ◽  
Optical Power ◽  
Single Mode ◽  
Incoherent Light ◽  
Optical Output ◽  
Tapered Optical Fiber ◽  
Para Determinar

Astronomy has benefited significantly from the development of photonic technology. However, the use of single-mode optical fibers in this area is not entirely efficient, this is mainly since its core, of the order of 8 microns in diameter, does not allow the capture of large amounts of light. In addition, in certain astronomical studies, it is required to analyze the multimodal incoherent light coming from the stars, particularly in the spectral range of the near infrared. One solution to these demands is the use of photonic lanterns, which are devices that function as an interface between a set of single-mode fibers and a multimode fiber, and in whose transition very low optical losses are obtained. However, there is not as far as we know, a mathematical method for the analysis of the behavior of the output power in photonic lanterns. Therefore, in this work we propose a numerical approximation method to determine the optical output power of single mode optical fibers in a photonic lantern, using the solution of eigenvalue equations, as well as the spatial capture of a part of the distribution of optical power, through of the end of a monomode tapered optical fiber.

Sign in / Sign up

Export Citation Format

Share Document