Effects of chemical modification on fusion splicing strength and optical parameters of optical fiber

2005 ◽  
Vol 44 (1) ◽  
pp. 015002
Author(s):  
Liao Yanbiao
Keyword(s):  
Optical Fiber ◽  
Chemical Modification ◽  
Optical Parameters

Tailoring the Optical Parameters of Optical Fiber Interferometer With Dedicated Boron-Doped Nanocrystalline Diamond Thin Film

2017 ◽  
Vol 214 (11) ◽  
pp. 1700222 ◽  
Author(s):  
Daria Majchrowicz ◽  
Monika Kosowska ◽  
Przemysław Struk ◽  
Małgorzata Jędrzejewska-Szczerska
Keyword(s):  
Thin Film ◽  
Optical Fiber ◽  
Nanocrystalline Diamond ◽  
Optical Parameters ◽  
Diamond Thin Film ◽  
Boron Doped

The Chemical Modification of Microstructured Polymer Optical Fiber and for pH Determination

Applied laser ◽  
2012 ◽  
Vol 32 (5) ◽  
pp. 398-402
Author(s):  
李冬冬 Li Dongdong ◽  
佘江波 She Jiangbo ◽  
彭波 Peng Bo ◽  
王丽莉 Wang Lili
Keyword(s):  
Optical Fiber ◽  
Chemical Modification ◽  
Polymer Optical Fiber

HIGHLY ACCURATE WAVELENGTH SCANNED FOUR-WAVE MIXING EXPERIMENT IN AN OPTICAL FIBER AND DEMONSTRATION OF RETRIEVAL OF ITS LINEAR AND NONLINEAR OPTICAL PARAMETERS

2006 ◽  
Vol 15 (01) ◽  
pp. 141-156
Author(s):  
S. J. JUNG ◽  
J. Y. LEE ◽  
D. Y. KIM
Keyword(s):  
Optical Fiber ◽  
Nonlinear Optical ◽  
Chromatic Dispersion ◽  
Tunable Laser ◽  
Four Wave Mixing ◽  
Optical Parameters ◽  
Wave Mixing ◽  
Dependent Change ◽  
Measurement Results ◽  
Linear And Nonlinear

Accurate wavelength scanned four-wave mixing (FWM) measurement results in an optical fiber are presented with two tunable laser sources near the dispersion-zero wavelength of the fiber. By comparing the measured FWM data with a simple analytic expression, we have demonstrated that important linear and nonlinear optical properties such as zero-dispersion wavelength, dispersion slope and nonlinear refractive index of the sample fiber. Highly accurate and repeatable measurement results for a sample fiber are presented. Temperature-dependent change in the chromatic dispersion of a fiber is also investigated.

scholarly journals Tailoring the Optical Parameters of Optical Fiber Interferometer With Dedicated Boron-Doped Nanocrystalline Diamond Thin Film (Phys. Status Solidi A 11∕2017)

2017 ◽  
Vol 214 (11) ◽  
pp. 1770164 ◽  
Author(s):  
Daria Majchrowicz ◽  
Monika Kosowska ◽  
Przemysław Struk ◽  
Małgorzata Jędrzejewska-Szczerska
Keyword(s):  
Thin Film ◽  
Optical Fiber ◽  
Nanocrystalline Diamond ◽  
Optical Parameters ◽  
Diamond Thin Film ◽  
Boron Doped

Optical Fiber Device and Biological Tissue Phantoms for Determination of Optical Parameters in the Near‐Infrared Region

2004 ◽  
Vol 32 (5) ◽  
pp. 489-505 ◽  
Author(s):  
Omar Feix do Nascimento ◽  
Antonio Balbin Villaverde ◽  
Renato Amaro Zângaro ◽  
Marcos Tadeu Tavares Pacheco ◽  
Steven F. Durrant
Keyword(s):  
Optical Fiber ◽  
Biological Tissue ◽  
Near Infrared ◽  
Infrared Region ◽  
Optical Parameters ◽  
Tissue Phantoms ◽  
Near Infrared Region

Study of the optical parameters of a silica-polymeric optical fiber with a reflective coating made of a thermoplastic fluoropolymer

2020 ◽  
Vol 86 (7) ◽  
pp. 27-32
Author(s):  
A. A. Zamyatin ◽  
A. A. Makovetskii ◽  
I. P. Shilov ◽  
D. V. Lapshin
Keyword(s):  
Laser Radiation ◽  
Optical Fiber ◽  
Numerical Aperture ◽  
Optical Loss ◽  
Fiber Surface ◽  
Optical Parameters ◽  
Core Diameter ◽  
Protective Function ◽  
Reflective Coating ◽  
Rough Turning

Silica optical fibers (OF) having a core diameter of 400 – 800 μm made of biocompatible materials are widely used in laser medicine. The results of studying the optical parameters of novel silica-polymeric optical fiber with a reflective thermoplastic copolymer coating (tetrafluoroethylene – ethylene) and the influence of coating conditions on these optical parameters are presented. Coatings from polymer melt were applied to the silica fiber surface by orifice drawing. The numerical aperture of the drawn OF was measured by distribution of the laser radiation emerging from OF in the far field. The optical losses were determined by the distribution of the radiation scattered by the reflective coating along the OF length. The scattering parameters of the laser radiation transmitted through OF were estimated by the intensity and indicatrix of scattering. We studied OF samples up to 50 m in length with a silica core of about 400 μm in diameter and reflective coating with a thickness of 70 – 90 μm, the reflective coating also performed a protective function. The quality of applied coating and optical parameters of the OF samples depended on the speed of fiber drawing (coating speed) Vd. A smooth coating was obtained at Vd ≤ 2 m/min. When Vd > 2 m/min the coating became rough, turning into the so-called «shark skin» at Vd = 6 m/min. Observed scattering of radiation passing through the studied OF samples was attributed to the polymer structure which contained both crystalline and amorphous phases with different values of the refractive index. The smallest scattering was observed in a smooth-coated OF. The total optical loss at a wavelength λ = 532 nm amounted to 300 – 720 dB/km (a nominal numerical aperture was 0.44). Short (1.5 – 3 m) OF samples were shown to provide a transmission of 80 – 93% of the input power.

Technique for measuring laser radiation intensity in biological tissues

2013 ◽  
Vol 2 (3) ◽  
Author(s):  
Pavel Grachev ◽  
Victor Loschenov
Keyword(s):  
Laser Radiation ◽  
Optical Fiber ◽  
Radiation Intensity ◽  
Light Propagation ◽  
Continuous Wave ◽  
Biological Tissues ◽  
Optical Parameters ◽  
Laser Radiation Intensity ◽  
Transmitted Radiation ◽  
Tissue Surface

AbstractLaser methods, such as laser-induced fluorescence diagnostics, photodynamic therapy (PDT), and hyperthermia, are finding increasing use in medicine. Irradiation can be performed both with and without contact on the tissue surface. In the case of contact irradiation, especially when laser radiation is introduced into biological tissue through an optical fiber, it is important to know the processes taking place at the irradiation fiber end. These processes affect diffusely reflected radiation which returns to the fiber. By analyzing backscattered radiation, we can evaluate the quality of the radiation procedure and the state of the fiber end. The objectives of this study were to develop a method and device for measuring backscattered radiation power and using this method, to determine the time and temperature ranges realized in PDT and hyperthermia.Light propagation is discussed in bent optical fibers. A technique is proposed for measuring laser radiation intensity in the optical fiber bend. Based on this technique, a system was developed for monitoring the laser radiation dose absorbed in biological tissues. We studied samples of bovine liver, muscle and brain tissues. Experiments were performed using a 675 nm, 100–2200 mW continuous wave semi-conductor laser. Laser radiation was delivered through a silica/polymer optical fiber. Data concerning the temperature and transmitted radiation intensity was acquired.Modeling of the light propagation in a bent optical fiber showed that the sensitivity of the method depends on the position of the photodetectors, but is independent of the loop number of the optical fiber. The results of experiments are presented using different types of biological tissues. We obtained the experimental dependencies of backward and transmitted radiation intensities and the temperature of the tissue surface in the irradiated region on the irradiation time measured with a flat-end fiber. The characteristic ranges of tissue heating caused by irradiation were determined for use in clinical practice.The optical parameters of biological tissues change with increasing temperature. This affects the intensity of transmitting radiation and diffuse radiation entering the fiber. The change in the backscattered radiation intensity greatly depend on the temperature of the irradiated area. The control of the irradiation of biological objects provides an efficient delivery of laser radiation to biological tissues and increases hyperthermia and PDT treatment effect.

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