A Cascaded Multi- and Single-Mode Fiber Transporting for Laser Beam

2011 ◽  
Vol 109 ◽  
pp. 222-227
Author(s):  
Zhi Gang Xiao ◽  
Yao Jiang ◽  
Xiao Xiao
Keyword(s):  
Laser Beam ◽  
Beam Quality ◽  
Coupling Efficiency ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Butt Joint ◽  
Joint Coupling ◽  
Mode Field ◽  
Theoretical Predictions ◽  
Multi Mode

A model to calculate the butt-joint coupling efficiency between a multi-mode fiber to a single-mode fiber is presented based on a mode field coupling theory. The dependence of the coupling efficiency between the multi- and single-mode fibers on the core radius of the multi-mode fiber is investigated. A experiment is conducted with 532nm laser to measure the butt joint coupling efficiency of a multi-mode fiber to a single-mode fiber. Good agreement is obtained between the experimental results and the theoretical predictions. A cascaded multi- and single-mode fiber relay system is proposed to transport a laser beam with high power and good beam quality.

scholarly journals Study of Optimized Coupling Based on Micro-lensed Fibers for Fibers and Photonic Integrated Circuits in the Framework of Telecommunications and Sensing Applications

2017 ◽  
Vol 26 (4) ◽  
pp. 325 ◽  
Author(s):  
Si Dat Le ◽  
Enguerran Delcourt ◽  
Pauline Girault ◽  
Aldo Gutierrez-Arroyo ◽  
Paul Azuelos ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Photonic Integrated Circuits ◽  
Coupling Efficiency ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Mode Field ◽  
Sensing Applications ◽  
Mode Field Diameter ◽  
Non Linear ◽  
Linear Effects

We demonstrate the interest of expanded beam microlenses (around 55 µm of mode field diameter) to relax positioning tolerances and to decrease reflectance in single mode fiber to fiber interconnexions.  We also point out the interest of micro-lenses of very small mode field diameter (around 2 µm) to improve coupling efficiency in specialty fibers and integrated waveguides for non linear effects based functions and for sensors applications at a wavelength of 1.55 µm.

scholarly journals Peta-bit-per-second optical communications system using a standard cladding diameter 15-mode fiber

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Georg Rademacher ◽  
Benjamin J. Puttnam ◽  
Ruben S. Luís ◽  
Tobias A. Eriksson ◽  
Nicolas K. Fontaine ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Capacity Limits ◽  
Wavelength Division ◽  
Core Networks ◽  
Space Division Multiplexing ◽  
Space Division ◽  
Data Rates ◽  
Multi Mode

AbstractData rates in optical fiber networks have increased exponentially over the past decades and core-networks are expected to operate in the peta-bit-per-second regime by 2030. As current single-mode fiber-based transmission systems are reaching their capacity limits, space-division multiplexing has been investigated as a means to increase the per-fiber capacity. Of all space-division multiplexing fibers proposed to date, multi-mode fibers have the highest spatial channel density, as signals traveling in orthogonal fiber modes share the same fiber-core. By combining a high mode-count multi-mode fiber with wideband wavelength-division multiplexing, we report a peta-bit-per-second class transmission demonstration in multi-mode fibers. This was enabled by combining three key technologies: a wideband optical comb-based transmitter to generate highly spectral efficient 64-quadrature-amplitude modulated signals between 1528 nm and 1610 nm wavelength, a broadband mode-multiplexer, based on multi-plane light conversion, and a 15-mode multi-mode fiber with optimized transmission characteristics for wideband operation.

Coupling efficiency of non-uniformly correlated beams into a single-mode fiber in turbulence (Invited)

2020 ◽  
Vol 49 (12) ◽  
pp. 20201049-20201049
Author(s):  
蔺淑琴 Shuqin Lin ◽  
张继前 Jiqian Zhang ◽  
朱新蕾 Xinlei Zhu ◽  
王飞 Fei Wang ◽  
蔡阳健 Yangjian Cai ◽  
...  
Keyword(s):  
Coupling Efficiency ◽  
Single Mode ◽  
Single Mode Fiber

Bend Insensitive W-type Single Mode Fiber with 30µm Mode Field Diameter

2021 ◽  
Author(s):  
Vasilii Ustimchik ◽  
Dmitrijs Saharovs ◽  
Andrey Grishchenko ◽  
Yuri Chamorovskii ◽  
Valery Filippov
Keyword(s):  
Single Mode ◽  
Single Mode Fiber ◽  
Mode Field ◽  
Mode Field Diameter

Fabrication, Characterization and Microsensing of Whispering-Gallery Mode Micro-Coupling Systems

2008 ◽  
Author(s):  
Qiulin Ma ◽  
Tobias Rossmann ◽  
Zhixiong Guo
Keyword(s):  
Transmission Loss ◽  
Coupling Efficiency ◽  
High Sensitivity ◽  
Single Mode ◽  
Whispering Gallery Mode ◽  
Single Mode Fiber ◽  
Whispering Gallery ◽  
Coupling System ◽  
Wide Range ◽  
Micro Sensor

An optical micro-coupling system of whispering-gallery mode usually consists of a resonator (e.g. a sphere) and a coupler (e.g. a taper). In this report, silica microspheres of 50–500 μm in diameter are fabricated by hydrogen flame fusing of an end of a single mode fiber or fiber taper. Fiber tapers are fabricated by the method of heating and pulling that meets an adiabatic condition. Taper’s waist diameter can routinely be made less than 1 μm and almost zero transmission loss in a taper is achieved which allows an effective and phase-matched coupling for a wide range sizes of microspheres. Both resonators and couplers’ surface microstructure and shapes are examined by scanning electronic microscopy. Three regimes of coupling are achieved, enabling a good flexibility to control Q value and coupling efficiency of a micro-coupling system. Whispering gallery mode shift is used to demonstrate a novel temperature micro-sensor. Its sensitivity determined from actual experimental results agrees well with the theoretical value. A concept of using the photon’s cavity ring down (CRD) in the microsphere to make a novel high-sensitivity trace gas micro-sensor is proposed. The CRD time constant when ammonia is chosen as the analyte gas is predicted using the simulated absorption lines.

A temperature sensor based on the splicing of a core offset multi-mode fiber with two single mode fiber

2015 ◽  
Vol 11 (6) ◽  
pp. 434-437 ◽  
Author(s):  
Xing-hu Fu ◽  
Qin Liu ◽  
Yan-li Xiu ◽  
Hai-yang Xie ◽  
Chuan-qing Yang ◽  
...  
Keyword(s):  
Temperature Sensor ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Multi Mode

Experimental Investigation of Polymeric Material Removal by Low Diffraction Laser Beam

2002 ◽  
Vol 124 (2) ◽  
pp. 475-480
Author(s):  
Xuanhui Lu ◽  
Y. Lawrence Yao ◽  
Kai Chen
Keyword(s):  
Laser Beam ◽  
Polymeric Material ◽  
Material Removal ◽  
Beam Quality ◽  
Power Level ◽  
Average Power ◽  
Laser Material ◽  
Theoretical Predictions ◽  
Removal Processes

Effects of improved beam quality of a low diffraction laser beam on laser material removal processes are experimentally investigated in a polymeric material. The experimental results are in agreement with theoretical predictions. The results show that the low diffraction beam has marked advantages over the Gaussian beam in ablation-dominated material removal processes in terms of larger depth and smaller taper at the same average power level.

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