scholarly journals PREPARATION OF THE SINGLE MODE PLANAR OPTICAL SPLITTER MODULES AND THEIR CHARACTERIZATIONS

2017 ◽  
Vol 24 (1&2) ◽  
pp. 67-72
Author(s):  
Vu Doan Mien ◽  
Vu Thi Nghiem ◽  
Pham Van Truong
Keyword(s):  
Planar Waveguide ◽  
Fiber Optic ◽  
Single Mode ◽  
Optical Coupling ◽  
Fiber Optic Communications ◽  
Optical Splitter ◽  
Fiber Arrays ◽  
Input And Output ◽  
Humidity Range ◽  
Lateral Profile

Optical splitter modules have been prepared based on 1x8 single mode silica planar waveguide optical splitter chips with 250 µm spacing and v-groove fiber arrays for applications in fiber optic communications. We report the technology of precise optical coupling and packaging of the splitter modules and the measurements of the insertion loss (< 11 dB),  uniformity (< 0.80 dB) and polarization dependence loss (PLD < 0.10 dB) as well as the lateral profile and the image of the input and output lights for the wavelengths of 1310 nm and 1550 nm. The main characteristics of the prepared splitter modules are about the same for the commercial available products. The prepared modules have been tested for operation in the conditions of wide temperature range (5–80°C) and humidity range (50–98%) and no changes in the main characteristics were observed. 

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.

Balanced photoreceivers for analog and digital fiber optic communications (Invited Paper)

2005 ◽  
Author(s):  
Abhay Joshi ◽  
Xinde Wang ◽  
Dan Mohr ◽  
Don Becker ◽  
Christoph Wree
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Communications

Comparison of optical back propagation schemes for fiber-optic communications

2013 ◽  
Vol 19 (1) ◽  
pp. 4-9 ◽  
Author(s):  
Mahdi Malekiha ◽  
Dong Yang ◽  
Shiva Kumar
Keyword(s):  
Fiber Optic ◽  
Back Propagation ◽  
Fiber Optic Communications
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