scholarly journals Fabrication and Characterization of Er/Yb Co-Doped Fluorophosphosilicate Glass Core Optical Fibers

Fibers ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 15
Author(s):  
Denis S. Lipatov ◽  
Alexey S. Lobanov ◽  
Alexey N. Guryanov ◽  
Andrey A. Umnikov ◽  
Alexey N. Abramov ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Chemical Vapor ◽  
Single Mode ◽  
Lasing Efficiency ◽  
Core Diameter ◽  
Manufacturing Method ◽  
Mode Area ◽  
First Time ◽  
Co Doped

The technical process of the synthesis of a fluorophosphosilicate (FPS) glass core was thoroughly investigated for the first time utilizing a modified chemical vapor deposition (MCVD) all-gas-phase fabrication method. It was discovered that the limiting doping level of the silica glass simultaneously co-doped with phosphorus (P) and fluorine (F) was found to be confined by the formation of POF3 gas. The dopants content was achieved as high as 4.7 at% of P and 1.1 at% of F in a glass core, respectively. A developed “in-house” manufacturing method makes it possible to fabricate a large mode area (LMA) purely single-mode Er–Yb co-doped optical fibers with a core diameter of 20 μm and with a lasing efficiency comparable to commercially available LMA Er–Yb optical fibers.

Graded-Index and Single-Mode Polymer Optical Fibers

1992 ◽  
Vol 247 ◽  
Author(s):  
Yasuhiro Koike
Keyword(s):  
Mechanical Properties ◽  
Optical Fibers ◽  
Single Mode ◽  
Polymer Optical Fiber ◽  
Core Diameter ◽  
Graded Index ◽  
The Core ◽  
High Bandwidth ◽  
Polymer Optical Fibers ◽  
First Time

ABSTRACTHigh-bandwidth graded-index (GI) polymer optical fiber (POF) and single-mode POF with good mechanical properties were successfully obtained by our interfacial-gel polymerization technique. The bandwidth of the GI POF is about 1 GHz · km which is two hundred times larger than that of the conventional step-index (SI) POF. The minimum attenuation of transmission is 56 dB/km at 688-nm wavelength and 94 dB/km at 780-nm wavelength. The single-mode POF in which the core diameter was 3–15 μ m and the attenuation of transmission was 200 dB/km at 652-nm wavelength was successfully obtained for the first time.

Time-resolved acousto-optic interaction in single-mode optical fibers: characterization of axial nonuniformities at the nanometer scale

2014 ◽  
Vol 39 (6) ◽  
pp. 1437 ◽  
Author(s):  
E. P. Alcusa-Sáez ◽  
A. Díez ◽  
M. González-Herráez ◽  
M. V. Andrés
Keyword(s):  
Optical Fibers ◽  
Single Mode ◽  
Nanometer Scale ◽  
Time Resolved ◽  
Acousto Optic Interaction

scholarly journals Characterization of a Y-Coupler and Its Impact on the Performance of Plastic Optical Fiber Links

Fibers ◽  
2018 ◽  
Vol 6 (4) ◽  
pp. 96 ◽  
Author(s):  
Alicia López ◽  
M. Losada ◽  
Javier Mateo ◽  
N. Antoniades ◽  
Xin Jiang ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Power Distribution ◽  
Glass Fibers ◽  
Single Mode ◽  
Transmission Properties ◽  
Modal Power ◽  
Custom Made ◽  
Plastic Optical Fibers ◽  
The Impact

Couplers and splitters are common devices in single-mode and multi-mode glass fibers applications, where they perform a variety of functions. However, when switching to plastic optical fibers (POFs), there is a shortage of commercial devices, which are usually custom-made. The problem with these devices is that modal power distribution in POFs is easily modified by spatial disturbances that produce a localized strong power transfer between modes, thus changing their transmission properties. In this work, a commercial Y-coupler designed for POFs is experimentally characterized. Measurements of its spectral, spatial and temporal characteristics have been performed, including insertion loss as a function of wavelength, angular power distribution, and frequency response. The obtained results show that this device has an equalizing effect over the power spatial distribution that reduces the fiber bandwidth, demonstrating the importance of considering the impact of this type of devices on the transmission properties of any POF system.

Distributed characterization of bending effects on the birefringence of single-mode optical fibers

2010 ◽  
Vol 35 (14) ◽  
pp. 2481 ◽  
Author(s):  
Luca Palmieri ◽  
Andrea Galtarossa ◽  
Tommy Geisler
Keyword(s):  
Optical Fibers ◽  
Single Mode

Microstructural and Optical Characterization of GaN Films Grown by PECVD on (0001) Sapphire Substrates

1989 ◽  
Vol 162 ◽  
Author(s):  
T. P. Humphreys ◽  
C. A. Sukow ◽  
R. J. Nemanich ◽  
J. B. Posthill ◽  
R. A. Rudder ◽  
...  
Keyword(s):  
Vapor Deposition ◽  
Chemical Vapor ◽  
Optical Characterization ◽  
Epitaxial Films ◽  
Optical And Electrical Properties ◽  
Spectroscopy Data ◽  
Sapphire Substrates ◽  
Cubic Gan ◽  
First Time

ABSTRACTEpitaxial GaN films have been grown by plasma-enhanced chemical vapor deposition (PECVD). The growth procedure utilizes a He gas discharge combined with the down-stream introduction of trimethylgallium (TMGa) and nitrogen. Both cubic [1111 and wurtzitic [0001] GaN epitaxial films have been achieved on (0001) sapphire substrates. Differences in substrate growth temperatures are believed to account for the different observed phases. A comparative study pertaining to the microstructural, optical and electrical properties of the α-GaN and β-GaN heteroepitaxial films is presented. Also reported for the first time is the Raman spectroscopy data for cubic GaN.

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