Radiation effects in erbium-doped optical fibres

Williams, Glen M.; Putnam, Martin A.; Askins, Charles G.; Gingerich, M. E.; Friebele, E. J.

doi:10.1049/el:19921158

Cited by 43 publications

(18 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[33,[36][37][38][39] It is difficult to compare results given the variety of fiber compositions, measurement conditions, and ways of expressing the results. An attempt has been made however, in Table I, looking only at Ge02-A1203-Si02 host compositions and normalizing the sensitivity to a millidB/kilometer/rad figure-of-merit.…”

Section: Gamma Radiation Induced Losses In Er-doped Fibermentioning

confidence: 99%

See 1 more Smart Citation

Defect engineering in doped silica fiber: are there good and bad defects?

et al. 1994

View full text Add to dashboard Cite

The defect driven properties of erbium doped fiber amplifier devices are reviewed examining the role of the host dopants aluminum, phosphorus and germanium, typically used in these applications. The effects of added loss on the performance of amplifiers are shown by way of modeling.Measurements of the gamma and UV radiation induced absorption are presented to show the generic host gi ass composition effects on radiation induced loss and their relative magnitude.In contrast to these bad' defects, the UV induced effects in H2 impregnated fiber are discussed in their role as 'good" defects, allowing the more efficient writing of UV induced gratings.

show abstract

Section: Gamma Radiation Induced Losses In Er-doped Fibermentioning

confidence: 99%

“…recovery 50 (lOm) , 102 (lOOm) Williams [38] 980nm model 1O 10.0 18 hr.recovery 290 (lOm), 119 (lOOm) Williams[38] 1480nm model…”

mentioning

confidence: 99%

Defect engineering in doped silica fiber: are there good and bad defects?

et al. 1994

View full text Add to dashboard Cite

show abstract

“…Co-dopants, such as Yb, are also employed as sensitizers to enhance the Er 3+ -luminescence efficiency through a transfer process of the excitation energy between the resonant levels of these lanthanide elements [3][4][5]. One of most critical issues of this type of fibers concerns their characteristic of being very sensitive to ionizing radiation [6]; this contrasts with the requirement to use them in hard environments and, actually, it is at stake for their employment in several application fields (space and nuclear) [1]. The microscopic origin of photodarkening is also currently debated also in connection with the core composition [7]; in particular, it has been hypothesized that Yb plays a crucial role since ionizing radiation may change its valence [8] or induce oxygen deficient centers nearby [9].…”

Section: Introductionmentioning

confidence: 99%

Influence of Ce codoping and H2 pre-loading on Er/Yb-doped fiber: Radiation response characterized by Confocal Micro-Luminescence

Vivona

Girard

Marcandella

et al. 2011

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

International audienceConfocal microscopy luminescence measurements were applied to study the X-ray radiation response of Er/Yb-doped optical fibers in connection with H2 pre-loading and with the addition of another lanthanide element (Cerium) in the core composition. Laser excitations at 488 nm and 325 nm allow deriving the emission and absorption pattern of Er3+, the latter derived from the dips appearing in a wide luminescence band related to defects in silica. We found that the luminescence spectrum of the X-irradiated Er/Yb-doped core fiber evidences an increase in the emission intensity around 520 and 660 nm; in contrast, no changes are induced by radiation neither after H2 pre-loading nor when the Cerium is added to the core composition. Both treatments reduce the generation of defects in the Er-doped fibers thus providing hardness in the radiative environment

show abstract

“…Other ones have been recovered by means of the PSO approach (e.g., the lifetimes, energy transfer coefficients and , up-conversion coefficients and ). The erbium absorption cross sections have been evaluated directly from the spectral attenuation measurements performed on STD and RH fiber samples before irradiation, through excitation of the fiber core, according to the relation [24]: (1) where is the measured erbium spectral attenuation expressed in dB/m, is the erbium ion concentration in the sample (ions/m ), is the overlap factor between the propagated mode and the erbium ion distribution defined as: (2) where is the core diameter and is the normalized transverse electric field envelope so that the surface integral of is equal to one. The ytterbium absorption cross sections have been calculated by using an equation similar to (1): (3) where and are the core and cladding areas, respectively.…”

Section: A Validation Of the Calculation Code Without Radiation Effectsmentioning

confidence: 99%

Design of Radiation-Hardened Rare-Earth Doped Amplifiers Through a Coupled Experiment/Simulation Approach

Girard

Mescia²,

Vivona

et al. 2013

J. Lightwave Technol.

View full text Add to dashboard Cite

Abstract-We present an approach coupling a limited experimental number of tests with numerical simulations regarding the design of radiation-hardened (RH) rare earth (RE)-doped fiber amplifiers. Radiation tests are done on RE-doped fiber samples in order to measure and assess the values of the principal input parameters requested by the simulation tool based on particle swarm optimization (PSO) approach. The proposed simulation procedure is validated by comparing the calculation results with the measured degradations of two amplifiers made with standard and RH RE-doped optical fibers, respectively. After validation, the numerical code is used to theoretically investigate the influence of some amplifier design parameters on its sensitivity to radiations. Simulations show that the RE-doped fiber length used in the amplifier needs to be adjusted to optimize the amplifier performance over the whole space mission profile rather than to obtain the maximal amplification efficiency before its integration in the harsh environment. By combining this coupled approach with the newly-developed RH RE-doped fibers, fiber-based amplifiers nearly insensitive to space environment may be designed in the future.

show abstract

Radiation effects in erbium-doped optical fibres

Cited by 43 publications

References 3 publications

Defect engineering in doped silica fiber: are there good and bad defects?

Defect engineering in doped silica fiber: are there good and bad defects?

Influence of Ce codoping and H2 pre-loading on Er/Yb-doped fiber: Radiation response characterized by Confocal Micro-Luminescence

Design of Radiation-Hardened Rare-Earth Doped Amplifiers Through a Coupled Experiment/Simulation Approach

Contact Info

Product

Resources

About