Tapers in single-mode optical fibre by controlled core diffusion

Harper, J. S.; Botham, C.P.; Hornung, Severin

doi:10.1049/el:19880165

Cited by 38 publications

(8 citation statements)

References 4 publications

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“…Those systems enable the use of two basic processes for changing fiber properties such as core diameter and clad and mode field: thermal core expansion (TEC) ( Figure 2a) and physical tapering ( Figure 2b). TEC is a technology which allows for effective reduction of the mode field mismatch loss between two different fibers [35][36][37][38][39]. This process involves heating fibers with a temperature typical for splicing (for a silica fiber it is approximately 2000 °C) for much longer than a splice itself.…”

Section: Basic Power Combiners and Mode Field Adaptors Fabrication Prmentioning

confidence: 99%

High-Power Passive Fiber Components for All-Fiber Lasers and Amplifiers Application—Design and Fabrication

Stachowiak

2018

Photonics

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The most important components for application in high-power all-fiber lasers and amplifiers are, most of all, power combiners, but also mode field adaptors. This paper summarizes recent achievements in the area of development and fabrication of high-power passive fiber components. The principles of operation and basic design and fabrication criteria, which have to be taken into account while designing the aforementioned components, are explained in detail. The most recent impressive achievements are summarized and described.

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Section: Basic Power Combiners and Mode Field Adaptors Fabrication Prmentioning

confidence: 99%

High-Power Passive Fiber Components for All-Fiber Lasers and Amplifiers Application—Design and Fabrication

Stachowiak

2018

Photonics

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“…Fused point Signalfiber effective approach to reduce the model filed mismatch loss [5][6][7][8] . The TEC technology uses high temperature flame to heat the fiber core and make the dopant diffuse.…”

Section: Pump and Signal Fibersmentioning

confidence: 99%

The study of the thermally expanded core technique in end-pumped (N+1)×1 type combiner

Sun

Wang

et al. 2015

SPIE Proceedings

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Tapering will raise the signal loss in an end-pumped (N+1)×1 type combiner. In this paper, the Thermally Expanded Core (TEC) technique is used in the signal loss optimization experiment with the tapering ratio of the pump combiner is 0.6. The experimental results indicate that the coupling efficiency of the 1.55μm signal light increases from 81.1% to 86.6%, after being heated 10 minutes at the homo-waist region of the tapered signal fiber with an 8mm wide hydroxygen flame. Detail analysis shows that the TEC technique can both reduce the loss of the LP 01 mode and the LP 11 mode in the signal fiber.

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“…In order to transmit UV light through the fibre sample, a special doubly-spliced fibre was fabricated: A UV-guiding fibre using fluorine-doped cladding (Nufern S630-HP, 3.5 µm core, 125 µm cladding, 590 ± 30 nm cutoff wavelength, NA = 0.12) was used to guide the UV and visible light to the fibre taper. Since fluorine-doped fibres lose the light guiding capability during pulling, which might be explained by the high diffusion rate of fluorine [23] resulting in a reduced refractive-index step, they cannot be used for tapering. In contrast, germaniumdoped fibres are chemically stable under flame pulling, but slightly absorb UV light.…”

Section: Experimental Setup For Detection and Optical Switchingmentioning

confidence: 99%

Switching photochromic molecules adsorbed on optical microfibres

Wiedemann¹,

Alt²,

Meschede³

2012

Opt. Express

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The internal state of organic photochromic spiropyran molecules adsorbed on optical microfibres is optically controlled and measured by state-dependent light absorption. Repeated switching between the states is achieved by exposure to the evanescent field of a few nanowatts of light guided in the microfibre. By adjusting the microfibre evanescent field strength the dynamic equilibrium state of the molecules is controlled. Time-resolved photoswitching dynamics are measured and modelled with a rate equation model. We also study how many times the photochromic system can be switched before undergoing significant photochemical degradation.

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Tapers in single-mode optical fibre by controlled core diffusion

Cited by 38 publications

References 4 publications

High-Power Passive Fiber Components for All-Fiber Lasers and Amplifiers Application—Design and Fabrication

High-Power Passive Fiber Components for All-Fiber Lasers and Amplifiers Application—Design and Fabrication

The study of the thermally expanded core technique in end-pumped (N+1)×1 type combiner

Switching photochromic molecules adsorbed on optical microfibres

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