All Optical Switching In Rare-earth Doped Fibers

Arkwright, John W.; Atkins, G.R.; Brodzeli, Zourab; Canning, John; Janos, M.; Elango, P.; Sceats, Mark G.; Whitbread, T.

doi:10.1109/cleopr.1997.610950

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…At very high powers, therefore, at this point in time it remains preferable to keep the gratings external to the active medium. This stringent limitation is almost certainly most serious for Yb 3+ which is known to have a high-thermal nonradiative component as well as unusual resonant excitation processes which may couple light directly into the band edge and consequently also leading to index change [65].…”

Section: Femtosecond Laser Written Gratingsmentioning

confidence: 99%

Gratings in Structured Optical Fibres

et al. 2008

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Grating writing in structured optical fibres and their properties and applications are reviewed. To date, most gratings have been written in a straightforward manner into structured fibres containing a photosensitive germanosilicate step-index core. However, gratings have also been written directly into single material, structured silica fibres and into air-clad cores using two and higher-photon processes with both UV and near IR pulsed (nanosecond-femtosecond) light. Given the intrinsic-added functionality possible within a structured optical fibre, structured fibre gratings offer further capabilities for sensors, diagnostics, lasers, and devices.

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Section: Femtosecond Laser Written Gratingsmentioning

confidence: 99%

Gratings in Structured Optical Fibres

et al. 2008

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“…The potential for applications is intriguing: a bandgap propagating mode in the core being accompanied by well isolated optical modes within the rings (except where perturbations reintroduced) could offer very compact means of mass parallel transmission. Many possible variations both passive and active come into play, especially if one notes both the large thermal and electronic far-off resonance nonlinearity associated with Yb 3+ [12]. One example might be a very sensitive end face sensor with three detection rings providing high spatial resolution towards the centre of the fibre.…”

Section: Resultsmentioning

confidence: 98%

Bragg gratings within each of the 3 GeO 2 -doped rings of a step-ring index low order Yb³⁺-doped core Cantor fractal bandgap fibre

et al. 2010

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“…Femtosecond gratings are now known to self erase within such lasers when operated under Q-switched operations [75]. At very high powers it remains preferable to keep the gratings external to the active medium, although this stringent limitation is most serious for Yb 3+ which is known to have a high thermal non-radiative component as well as unusual resonant excitation processes which can couple light directly into the band edge which can also lead to index change [76].…”

Section: Type II (Damage) Gratingsmentioning

confidence: 99%

Fibre gratings and devices for sensors and lasers

Canning

2008

Laser & Photonics Reviews

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262

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Although mainstream grating writing, more often than not using single photon excitation of germanosilicate based defects with CW 244 nm light, remains the key technology for complex devices it is now being complemented by a whole host of processes which can enhance and tailor the properties of both conventional and not-so-conventional fibre Bragg gratings. Further, processes for writing of gratings in non-germanosilicate fibres have also continued to develop and include multi-photon excitation directly into the band edge of the glass. It is now possible to custom tailor a gratings property based on the application and the nature of production as well as custom tailor the grating writing process to suit the type of fibre and application. Examples and suggestions where these can benefit sensors and lasers are outlined.The various diffraction orders produced through a phase mask during UV direct writing of Bragg gratings -the two brightest are the +1 and −1 orders whilst the central zero order is suppressed most. This method remains the most commonly used approach to fibre Bragg grating writing, including in very large diameter fibres.

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All Optical Switching In Rare-earth Doped Fibers

Cited by 5 publications

References 3 publications

Gratings in Structured Optical Fibres

Gratings in Structured Optical Fibres

Bragg gratings within each of the 3 GeO 2 -doped rings of a step-ring index low order Yb³⁺-doped core Cantor fractal bandgap fibre

Fibre gratings and devices for sensors and lasers

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All Optical Switching In Rare-earth Doped Fibers

Cited by 5 publications

References 3 publications

Gratings in Structured Optical Fibres

Gratings in Structured Optical Fibres

Bragg gratings within each of the 3 GeO 2 -doped rings of a step-ring index low order Yb3+-doped core Cantor fractal bandgap fibre

Fibre gratings and devices for sensors and lasers

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Product

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Bragg gratings within each of the 3 GeO 2 -doped rings of a step-ring index low order Yb³⁺-doped core Cantor fractal bandgap fibre