scholarly journals BAC Photobleaching in Bismuth-Doped and Bismuth/Erbium Co-Doped Optical Fibers

2020 ◽  
Author(s):  
Bowen Zhang ◽  
Mingjie Ding ◽  
Shuen Wei ◽  
Binbin Yan ◽  
Gang-Ding Peng ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
High Performance ◽  
Near Infrared ◽  
Laser Exposure ◽  
Active Centers ◽  
Irradiation Intensity ◽  
Nir Luminescence ◽  
Co Doped ◽  
Irradiation Wavelength

Bismuth-doped optical fiber (BDF) and bismuth/erbium co-doped optical fiber (BEDF) have attracted much attention due to their ultra-broadband luminescence in the near-infrared (NIR) region. The photobleaching effect on bismuth active centers (BACs) related to the NIR luminescence has been systematically investigated and summarized, in terms of irradiation intensity, irradiation wavelength, and temperature. All these findings not only give the deep insights into the fundamental structure of BACs but also provide an effective way to control the BACs. They play an important role for the development of BDF- and BEDF-based devices with high performance and stability under laser exposure in future.

Electronic and luminescence characteristics of Bi/Al co-doped silica optical fiber

2019 ◽  
Vol 33 (27) ◽  
pp. 1950325
Author(s):  
Gang Liu ◽  
Yanliang Guo ◽  
Pengfei Zhu ◽  
Baonan Jia ◽  
Shanjun Li ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Near Infrared ◽  
Luminescence Center ◽  
Al Substitution ◽  
Substitution Site ◽  
Silica Optical Fiber ◽  
Luminescence Characteristics ◽  
Nir Luminescence ◽  
Co Doped

Electronic and luminescence characteristics of Bi/Al co-doped silica optical fiber model were investigated by using first-principle methods. Our results show that the preference Al substitution site is the adjacent Si site rather than O site. The doping of Al can contribute to the dispersion of Bi[Formula: see text] luminescence center and generate new luminescence center at [Formula: see text]1100 nm by affecting [Formula: see text] orbital of the O atom near Bi atom. Our results give a possible explanation of the near-infrared (NIR) luminescence in Bi/Al co-doped silica optical fibers.

scholarly journals Structure and Luminescence Properties of Transparent Germanate Glass-Ceramics Co-Doped with Ni2+/Er3+ for Near-Infrared Optical Fiber Application

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2115
Author(s):  
Magdalena Lesniak ◽  
Marcin Kochanowicz ◽  
Agata Baranowska ◽  
Piotr Golonko ◽  
Marta Kuwik ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Near Infrared ◽  
Glass Ceramics ◽  
Glass Network ◽  
Luminescent Properties ◽  
Heating Time ◽  
Germanate Glass ◽  
Co Doped ◽  
Infrared Optical Fiber

An investigation of the structural and luminescent properties of the transparent germanate glass-ceramics co-doped with Ni2+/Er3+ for near-infrared optical fiber applications was presented. Modification of germanate glasses with 10–20 ZnO (mol.%) was focused to propose the additional heat treatment process controlled at 650 °C to obtain transparent glass-ceramics. The formation of 11 nm ZnGa2O4 nanocrystals was confirmed by the X-ray diffraction (XRD) method. It followed the glass network changes analyzed in detail (MIR—Mid Infrared spectroscopy) with an increasing heating time of precursor glass. The broadband 1000–1650 nm luminescence (λexc = 808 nm) was obtained as a result of Ni2+: 3T2(3F) → 3A2(3F) octahedral Ni2+ ions and Er3+: 4I13/2 → 4I15/2 radiative transitions and energy transfer from Ni2+ to Er3+ with the efficiency of 19%. Elaborated glass–nanocrystalline material is a very promising candidate for use as a core of broadband luminescence optical fibers.

Specialty High Performance Coatings for Optical Fiber Applications via Perfluorocyclobutyl (PFCB) Aryl Ether Polymers

2007 ◽  
Vol 1030 ◽  
Author(s):  
Stephen M. Budy ◽  
Scott T. Iacono ◽  
Wade Hawkins ◽  
Paul Foy ◽  
John Ballato ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
High Performance ◽  
Polymer Coatings ◽  
Aryl Ether ◽  
Molecular Weights ◽  
Higher Temperature ◽  
Optical Applications ◽  
Optical Fiber Applications ◽  
Fiber Coatings

AbstractThere is a growing need for optical fiber coatings that can sustain higher temperatures than present materials permit. To date, polyimides are used predominantly but they generally are difficult to process and usually require multiple depositions to achieve the desired film thickness. Perfluorocyclobutyl (PFCB) aryl ether polymers have demonstrated much success as processable and amorphous fluoropolymers,[1] with particular emphasis on high performance optical applications.[2] This work discusses recent efforts into perfluorocyclobutyl aryl ether polymer-based optical fiber coatings.[3] A series of silica-based optical fibers were drawn with differing PFCB polymer coatings compositions and molecular weights on a Heathway draw tower. Results include a more than doubled usage temperature of coating (decomposition temperatures (Td) in nitrogen and air were above 450 °C) without affecting fiber mechanical properties and comparable isothermal stability to conventional coatings, except with a >150 °C higher temperature. Preliminary results of the first successful coating of optical fibers by PFCB polymers will be presented herein, as well as future endeavors.

Improved sensitization efficiency in Er3+ ions and SnO2 nanocrystals co-doped silica thin films

2015 ◽  
Vol 17 (18) ◽  
pp. 11974-11980 ◽  
Author(s):  
Xiaowei Zhang ◽  
Shaobing Lin ◽  
Tao Lin ◽  
Pei Zhang ◽  
Jun Xu ◽  
...  
Keyword(s):  
Thin Films ◽  
High Performance ◽  
Near Infrared ◽  
Sno2 Nanocrystals ◽  
Silica Thin Films ◽  
Sensitization Efficiency ◽  
Co Doped

High performance near-infrared luminous using broadband UV pumping.

Low-power consumption seamless wireless and wired links using transparent waveform transfer

2014 ◽  
Vol 3 (5-6) ◽  
Author(s):  
Tetsuya Kawanishi
Keyword(s):  
Power Consumption ◽  
Optical Fiber ◽  
Low Power ◽  
Millimeter Wave ◽  
Optical Fibers ◽  
High Speed ◽  
High Performance ◽  
Digital Signal ◽  
Low Power Consumption ◽  
Wireless Links

AbstractThis paper describes wired and wireless seamless networks consisting of radiowave and optical fiber links. Digital coherent technology developed for high-speed optical fiber transmission can mitigate signal deformation in radiowave links in the air as well as in optical fibers. Radio-over-fiber (RoF) technique, which transmits radio waveforms on intensity envelops of optical signals, can provide direct waveform transfer between optical and radio signals by using optical-to-electric or electric-to-optical conversion devices. Combination of RoF in millimeter-wave bands and digital coherent with high-performance digital signal processing (DSP) can provide wired and wireless seamless links where bit rate of wireless links would be close to 100 Gb/s. Millimeter-wave transmission distance would be shorter than a few kilometers due to large atmospheric attenuation, so that many moderate distance wireless links, which are seamlessly connected to optical fiber networks should be required to provide high-speed mobile-capable networks. In such systems, reduction of power consumption at media converters connecting wired and wireless links would be very important to pursue both low-power consumption and large capacity.

Calibration in the Fiber Optic Region of the Near-Infrared

1987 ◽  
Vol 41 (5) ◽  
pp. 779-785 ◽  
Author(s):  
Brad Tenge ◽  
B. R. Buchanan ◽  
D. E. Honigs
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Near Infrared ◽  
Fiber Optic ◽  
Infrared Region ◽  
Infrared Analysis ◽  
Calibration Models ◽  
Fiber Technology ◽  
Calibration Techniques ◽  
Hostile Environments

Chemical sensing in remote, hostile environments is possible with optical fiber technology. Telecommunications optical fiber transmits light in the near-infrared region. The least amount of attenuation of transmitted power is between 1050 nm and 1600 nm. It is a natural step to apply near-infrared analysis techniques to data remotely collected over optical fibers. A feasibility study is conducted to see how well calibration techniques, Multiple Linear Regression with either Step-up search or All Possible Combinations search, perform in the fiber optic region of the near-infrared. Calibration in the 1131–1531 nm region is compared to calibration in the 1131–2531 nm region. The latter region is considered more information-rich than the former. In spite of this, examination of the predictive power of calibration models formed strictly from fiberoptic-region absorbance data indicates that this region contains useful analytical informaton.

scholarly journals Effects of quenching and cooling upon near infrared luminescence of Bi/Er co-doped optical fiber

2019 ◽  
Vol 9 (7) ◽  
pp. 3156 ◽  
Author(s):  
Haijiao Xu ◽  
Binbin Yan ◽  
Jinfeng Lin ◽  
Yanhua Luo ◽  
Pengfei Lu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Near Infrared ◽  
Infrared Luminescence ◽  
Co Doped

Detection of Ethanol in Wines Using Optical-Fiber Measurements and Near-Infrared Analysis

1988 ◽  
Vol 42 (6) ◽  
pp. 1106-1111 ◽  
Author(s):  
B. R. Buchanan ◽  
D. E. Honigs ◽  
Cynthia J. Lee ◽  
William Roth
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Wavelength Range ◽  
Near Infrared ◽  
Signal To Noise Ratio ◽  
Infrared Analysis ◽  
Calibration Model ◽  
Infrared Measurements ◽  
Calibration Algorithm ◽  
Order Of Magnitude

Optical-fiber measurements coupled with near-infrared analysis is used to predict the ethanol content of wine samples to within ±0.33 volume percent. Because telecommunications-grade optical fibers are used, the wavelength range is limited and the signal-to-noise ratio is an order of magnitude less than that for conventional near-infrared measurements. These features prompted the use of partial least-squares (PLS) as the calibration algorithm. PLS provides robust calibrations that are based upon the entire spectrum. The problem of extreme samples not being represented in the calibration model is discussed and illustrated. Also, the robustness of the PLS calibration is demonstrated. Spectral reconstruction is used to help assign the bands in the wavelength range used.

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