Results 221 to 230 of about 4,961 (255)

Development of large core microstructured polymer optical fiber

SPIE Proceedings, 2012
In this paper we report the in-house synthesis of optical grade PMMA suitable for fiber development and fabrication of a large core micro-structured polymer optical fiber (mPOF). We have designed an mPOF with a core area of 580 μm2 and single mode performance at a wavelength of 650 nm. The photonic cladding is composed of 3 rings of air holes with a
Adam Filipkowski, Dariusz Pysz, Pawel Gdula, Katrin Welikow, Krzysztof Harasny, Andrew J. Waddie, Krzysztof Borzycki, Arno Kraft, Ryszard Piramidowicz, Ryszard Stepien, Mohammad R. Taghizadeh, Ryszard Buczynski   +11 more
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Microstructured polymer optical fiber sensors for optoacoustic endoscopy

SPIE Proceedings, 2017
Intravascular photoacoustics (IVPA) can complement intravascular ultrasound (IVUS) morphological information adding specificity. A practical IVUS/IVPA catheter is mandatory to have a wideband ultrasonic detector with enough sensitivity despite the necessary miniaturization to be fitted in less than 1 mm to pass through thin vasculature.
D. Gallego, H. Lamela
openaire   +1 more source

Fabrication Conditions for Randomly Microstructured Polymer Optical Fibers

Integrated Photonics Research and Applications/Nanophotonics, 2006
Microstructured polymer optical fiber was fabricated in which bubbles were randomly distributed in the cladding to both guide and scatter light. The effect of fabrication conditions on the fiber structure and properties is discussed.
R. M. Chaplin, G. E. Town, M. J. Withford, D. Baer   +3 more
openaire   +1 more source

Sensing characteristics of birefringent microstructured polymer optical fiber

SPIE Proceedings, 2011
We experimentally studied several sensing characteristics of a birefringent microstructured polymer optical fiber. The fiber exhibits a birefringence of the order 2×10 -5 at 1.3 μm because of two small holes adjacent to the core. In this fiber, we measured spectral dependence of phase and group modal birefringence, bending losses, polarimetric ...
Marcin K. Szczurowski, Orlando Frazão, J. M. Baptista, Kristian Nielsen, Ole Bang, Wacław Urbańczyk   +5 more
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Tunable attenuator based on polymer microstructured optical fibers

Optoelectronics Letters, 2007
Based on polymer microstructured optical fibers (PMOF) and selective liquid crystal injection technology, a novel temperature control tunable attenuator is designed theoretically in this paper. In our experiments, PMMA microstructured optical fibers with high performance are drawn successfully and the selective injection of liquid crystal 5CB into ...
Ye-jin Zhang, Li-na He, Heng Ji, Si-gang Yang, Ming Chen, Shi-zhong Xie   +5 more
openaire   +1 more source

Laser based microstructuring of polymer optical fibers for sensors optimization

SPIE Proceedings, 2015
Microstructuring of Polymer Optical Fibers-POF through surface modification with UV excimer laser radiation has been performed and studied. The laser modified surface cavities on fibers act as material receptors of exact volume allowing highly controllable and repeatable structures.
Athanasekos L., Vasileiadis M., Sachat A.E., Βάϊνος, Νικόλαος  A., Vainos, Nikolaos A., Riziotis, Christos   +5 more
openaire   +2 more sources

Transmission of terahertz radiation using a microstructured polymer optical fiber

Optics Letters, 2008
A hollow-core microstructured polymer optical fiber was analyzed in the terahertz (THz) region. Spectral analysis of time domain data shows propagation of THz waves in both the hollow-core and the microstructured cladding with a time delay of approximately 20 ps. The frequency range and shift of the transmission bands between different sized waveguides
Carlito S, Ponseca, Romeric, Pobre, Elmer, Estacio, Nobuhiko, Sarukura, Alexander, Argyros, Maryanne C, Large, Martin A, van Eijkelenborg   +6 more
openaire   +2 more sources

Direct Writing of Fiber Bragg Grating in Microstructured Polymer Optical Fiber

IEEE Photonics Technology Letters, 2012
We report point-by-point laser direct writing of a 1520-nm fiber Bragg grating in a microstructured polymer optical fiber (mPOF). The mPOF is specially designed such that the microstructure does not obstruct the writing beam when properly aligned. A fourth-order grating is inscribed in the mPOF with only a 2.5-s writing time.
Alessio Stefani, Matthias Stecher, Graham E. Town, Ole Bang   +3 more
openaire   +1 more source

Mass-fabrication of air-core microstructured polymer optical fiber

2008 Conference on Lasers and Electro-Optics, 2008
An air-core, 252 holes cladding, 51% air-occupied fraction PMMA-based MPOF as successfully fabricated by drawing an extruded 253 holes preform. With the extrusion technique, air-core MPOF preform could be produced on a large scale.
null Lijun Kang, null Lili Wang, null Xinghua Yang, null Jian Wang   +3 more
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High birefringent microstructured polymer optical fiber with frozen stresses

12th Conference on Integrated Optics: Sensors, Sensing Structures, and Methods, 2017
We report on fabrication of a new type high birefringent microstructured polymer fiber with a PMMA stress applied element in the core. An inner part of preform consists regular three rings of holes, made by drilling method. Inside the microstructure we drilled an additional hole, where a special type – strongly stressed PMMA rod was placed.
Lidia Czyżewska, Paweł Mergo, Grzegorz Wójcik, Małgorzata Gil   +3 more
openaire   +1 more source