Research and Comparison of Brillouin Characteristics of Single-Mode Fiber, Few-Mode Fiber and Multi-Mode Fiber

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.

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

Optoelectronics Letters ◽

10.1007/s11801-015-5155-2 ◽

2015 ◽

Vol 11 (6) ◽

pp. 434-437 ◽

Cited By ~ 4

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

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Experimental Research of Strain and Temperature Based on EFPI Sensor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.130-134.4185 ◽

2011 ◽

Vol 130-134 ◽

pp. 4185-4188

Author(s):

Xiu Feng Yang ◽

Chun Yu Zhang ◽

Zheng Rong Tong

Keyword(s):

Low Cost ◽

Single Mode ◽

Single Mode Fiber ◽

Good Reliability ◽

High Repetition ◽

Sensing Applications ◽

Fabry Perot ◽

Wet Chemical ◽

The Many ◽

Multi Mode

An extrinsic Fabry-Perot (F-P) interferometric (EFPI) sensor by using simple etching and fusing method is proposed and demonstrated. The cavity is formed by wet chemical etching of multi-mode fiber (MMF) end face in hydrofluoric acid solutions, and then it is fused to the end of a single-mode fiber (SMF) to form an extrinsic F-P structure. The strain and temperature of EFPI sensor are studied experimentally. The experimental results show that the interference wavelength becomes 2.648nm longer while the strain increases from 0N to 637N, and the strain sensitivity is about 0.004nm/N, and linearity is 0.999. The interference wavelength becomes 0.032nm shorter while the temperature increases from 20°C to 100°C. This kind of sensor has the many advantages of easy fabrication, good reliability, high-repetition, small size, low cost and mass-production, which offers great prospect for sensing applications.

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Fabrication of Multimode-Single Mode Polymer Fiber Tweezers for Single Cell Trapping and Identification with Improved Performance

Sensors ◽

10.3390/s18092746 ◽

2018 ◽

Vol 18 (9) ◽

pp. 2746 ◽

Cited By ~ 4

Author(s):

Sandra Rodrigues ◽

Joana Paiva ◽

Rita Ribeiro ◽

Olivier Soppera ◽

João Cunha ◽

...

Keyword(s):

Single Mode ◽

Single Mode Fiber ◽

Physical Contact ◽

Scattered Signal ◽

Fabrication Method ◽

Cell Trapping ◽

Low Degree ◽

Single Cell Trapping ◽

Improved Performance ◽

Multi Mode

Optical fiber tweezers have been gaining prominence in several applications in Biology and Medicine. Due to their outstanding focusing abilities, they are able to trap and manipulate microparticles, including cells, needing any physical contact and with a low degree of invasiveness to the trapped cell. Recently, we proposed a fiber tweezer configuration based on a polymeric micro-lens on the top of a single mode fiber, obtained by a self-guided photopolymerization process. This configuration is able to both trap and identify the target through the analysis of short-term portions of the back-scattered signal. In this paper, we propose a variant of this fabrication method, capable of producing more robust fiber tips, which produce stronger trapping effects on targets by as much as two to ten fold. These novel lenses maintain the capability of distinguish the different classes of trapped particles based on the back-scattered signal. This novel fabrication method consists in the introduction of a multi mode fiber section on the tip of a single mode (SM) fiber. A detailed description of how relevant fabrication parameters such as the length of the multi mode section and the photopolymerization laser power can be tuned for different purposes (e.g., microparticles trapping only, simultaneous trapping and sensing) is also provided, based on both experimental and theoretical evidences.

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

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.109.222 ◽

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.

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A Stable Dual-Wavelengths Fiber Laser Equipped by an In-Fiber Integrated Michelson Interferometer

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.421.122 ◽

2013 ◽

Vol 421 ◽

pp. 122-126

Author(s):

Zhong Yao Feng ◽

Ling Li ◽

Dan Su ◽

Yu Peng Wang

Keyword(s):

Fiber Laser ◽

Interference Pattern ◽

Silver Film ◽

Michelson Interferometer ◽

Single Mode ◽

Gain Medium ◽

Single Mode Fiber ◽

Fiber Core ◽

The Core ◽

Multi Mode

In this letter, an in-fiber integrated Michelson interformeteris proposed and experimentally demonstrated. The device consists in the combination of multi-mode fiber (MMF) and a single-mode fiber (SMF) tip which is covered by thick silver film. The MMF excites cladding modes into downstream SMF via the mismatch-core splicing interface. The core-cladding modes are reflected back by the silver and recoupled to fiber core through the MMF. By the reason of fiber-core mismatch and core-cladding modes interference, a well-defined interference pattern is obtained. A stable dual-wavelength fiber laser based on a hybrid gain medium combined with the interferometer filter is realized.

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A Study on Cutting Glass Fibers by CO2 Laser

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.590.192 ◽

2014 ◽

Vol 590 ◽

pp. 192-196

Author(s):

Wen Hong Wu ◽

Chun Li Chang ◽

Chi Hung Hwang

Keyword(s):

Laser Cutting ◽

Glass Fibers ◽

Optical Design ◽

Single Mode ◽

Single Mode Fiber ◽

Data Traffic ◽

Core Diameter ◽

Cutting System ◽

Multi Mode

This The multi-mode fiber has been widely used in high data traffic applications since the transmitting rate of interface between data storages was larger than the capacity of fiber-optic communication with single mode fiber. The quality of end surface of fiber dominates the data transmitting efficiency. A good cutting end surface of single mode fiber can obtain by the traditional mechanical fiber cleaving methods. But, the multi-mode fiber has much larger core diameter than single mode fiber’s and the quality of cutting end surfaces which cut by the traditional mechanical fiber cleaving methods was not good enough. In the recent year, the pulse CO2 laser processing methods were introduced to cleave the fibers. In this research, a glass fiber laser cutting system was developed. The shapes of laser focusing spot and the concepts of laser cutting optical design were discussed in this paper. The experimental results show that the fiber cutting end surfaces with great quality, which were inspection by interferometer, can be obtained by the developed laser cutting system.

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