High power laser damage of standard and bend resistant fibres

Logunov, Stephan L.; Chien, Ching-Kee; Clark, Donald A.

doi:10.1049/el.2009.2106

Cited by 5 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are some issues concerning HPLs that remain to be solved. The first issue is the degradation of the cladding caused by high power [10]. Standard, bend-sensitive glass fibres subjected to 2-5 mm radii of bending and power levels of 1-2 W in the near-infrared wavelength window can fail in a few minutes [11].…”

Section: Study Of Power-over-fiber Technologymentioning

confidence: 99%

Metrology and Measurement Systems

Guzowski

Gozdur

Lakomski

2018

View full text Add to dashboard Cite

Monitoring and controlling the position of fibre optics connectors is a very important issue. Both autonomy and remote control of such a system are very desired and therefore energy independence must be provided. In this paper the design of an optical power supply system is given. A new idea of using the WDM technique in a power supply block is investigated. The electric power provided by a photovoltaic power converter and by a boost converter is shown. Moreover, in this paper the complete examination of efficiency of the system with different illuminations is given. The maximal output power of the system is 24.02 mW and the time required to identify a single fibre connector is t CYCLE = 0.65 s.

show abstract

Section: Study Of Power-over-fiber Technologymentioning

confidence: 99%

Metrology and Measurement Systems

Guzowski

Gozdur

Lakomski

2018

View full text Add to dashboard Cite

show abstract

“…Failures at bends are caused by the light that leaks from the core when the fiber is accidentally tightly bent under high power [3,[28][29][30][31][32][33][34][35][36][37]. The fiber coating absorbs the leaked light and its temperature increases, and a failure occurs at the bend.…”

Section: Open Accessmentioning

confidence: 99%

Optical Fiber for High-Power Optical Communication

Kurokawa

2012

Crystals

View full text Add to dashboard Cite

Abstract:We examined optical fibers suitable for avoiding such problems as the fiber fuse phenomenon and failures at bends with a high power input. We found that the threshold power for fiber fuse propagation in photonic crystal fiber (PCF) and hole-assisted fiber (HAF) can exceed 18 W, which is more than 10 times that in conventional single-mode fiber (SMF). We considered this high threshold power in PCF and HAF to be caused by a jet of high temperature fluid penetrating the air holes. We showed examples of two kinds of failures at bends in conventional SMF when the input power was 9 W. We also observed the generation of a fiber fuse under a condition that caused a bend-loss induced failure. We showed that one solution for the failures at bends is to use optical fibers with a low bending loss such as PCF and HAF. Therefore, we consider PCF and HAF to be attractive solutions to the problems of the fiber fuse phenomenon and failures at bends with a high power input.

show abstract

“…It is well known that failures at bends in an optical fiber are caused by light leaking from the core when the fiber is accidentally bent tightly with a high power input [29][30][31][32][33][34][35][36][37]. Two kinds of failure regimes have been classified by Sikora et al, which they named regime 1 (R1) and regime 2 (R2) failures [31].…”

Section: Introductionmentioning

confidence: 99%

Bending Induced Temperature Increases in Double-Clad Fibers for High-Power Fiber Lasers

Shuto¹

2022

JEEE

View full text Add to dashboard Cite

Rare-earth-doped optical fibers are one of the most promising solid-state lasers. In these fiber lasers, a cladding-pumping scheme using large-mode-area double-clad fibers (DCFs) is utilized to increase the overall conversion efficiency of pumping light and to overcome the restriction owing to the onset of stimulated Raman scattering. On the other hand, it is extremely challenging to increase the fiber core size while retaining the excellent beam quality because fibers with large core size allow propagation of several higher-order modes (HOMs), except for the fundamental mode (FM). In order to suppress HOMs, DCFs are bent with a relatively small bend radius. Failures at bends in an optical fiber are caused by light leaking from the core when the fiber is accidentally bent tightly with a high power input. For the DCFs with core radii of 10 and 20 µm, the relationship between the bending induced temperature increases and the bend losses in the bent DCFs was investigated theoretically by the explicit finite-difference method using the thermochemical SiO x production model. The temperature at the boundary between the inner and outer cladding layers increased with increasing optical power P at 1.080 µm and was a large value higher than the softening temperature T s of the silica glass when P = 5 kW was entered to the bent DCF with a bend radius R of 150 mm and a core radius of 10 µm. On the other hand, the temperature at the boundary was a small value lower than the T s when P = 10 kW was entered to the bent DCF with a large R of 245-275 mm. Furthermore, it was found that the initiation of the fiber fuse was fairly easy under a certain conditions where the temperature at the boundary was higher than the T s .

show abstract

High power laser damage of standard and bend resistant fibres

Cited by 5 publications

References 8 publications

Metrology and Measurement Systems

Metrology and Measurement Systems

Optical Fiber for High-Power Optical Communication

Bending Induced Temperature Increases in Double-Clad Fibers for High-Power Fiber Lasers

Contact Info

Product

Resources

About