Radiation Sensitivity of EDFAs Based on Highly Er-Doped Fibers

Gusarov, A.; Uffelen, Marco Van; Hotoleanu, Mircea; Thienpont, Hugo; Berghmans, Francis

doi:10.1109/jlt.2009.2014255

Cited by 33 publications

(15 citation statements)

References 15 publications

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“…Indeed, the results obtained with "NP-Al" and "Al-LB" clearly show that, at comparable Aluminum concentration, a much stronger resistance to radiations can be obtained. We also notice that comparing fibers "NP-Si+" and "NPSi" corroborates the design rule from A. Gusarov et al [4], bringing to the fore that fabricating shorter-length opticalamplifiers leads to radiation-resistant EDFA. However, this rule is to be weighted with the value of the RIA.…”

Section: B In-line Gain Measurements Under Radiationsupporting

confidence: 84%

“…The first one consists in fabricating shorter amplifiers [4]. Indeed, because the overall radiation induced losses grow as an exponential function of the amplifier fiber length, the first already visited way to reduce EDFA degradation has consisted in increasing Erbium concentration by means of conventional doping techniques, leading to huge concentrations of both Aluminum and Erbium.…”

Section: State Of the Artmentioning

confidence: 99%

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Radiation-hardened nano-particles-based Erbium-doped fiber for space environment

Thomas

Myara

Signoret

et al. 2017

International Conference on Space Optics — ICSO 2012

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Abstract-We demonstrate for the first time a radiationresistant Erbium-Doped Fiber exhibiting performances that can fill the requirements of Erbium-Doped Fiber Amplifiers for space applications. This is based on an Aluminum co-doping atom reduction enabled by Nanoparticules Doping-Process. For this purpose, we developed several fibers containing very different erbium and aluminum concentrations, and tested them in the same optical amplifier configuration. This work allows to bring to the fore a highly radiation resistant Erbium-doped pure silica optical fiber exhibiting a low quenching level. This result is an important step as the EDFA is increasingly recognized as an enabling technology for the extensive use of photonic sub-systems in future satellites.

show abstract

Section: B In-line Gain Measurements Under Radiationsupporting

confidence: 84%

Section: State Of the Artmentioning

confidence: 99%

Radiation-hardened nano-particles-based Erbium-doped fiber for space environment

Thomas

Myara

Signoret

et al. 2017

International Conference on Space Optics — ICSO 2012

View full text Add to dashboard Cite

show abstract

“…4 Indeed, because the overall radiation induced losses grow as an exponential function of the amplifier fiber length, the first already visited way to reduce EDFA degradation has consisted in increasing Erbium concentration by means of conventional doping techniques, leading to huge concentrations of both Aluminum and Erbium. However, this approach is limited by the increase of Aluminum-induced RIA and / or by the quenching effect, which both impact optical gain and output power.…”

Section: State Of the Artmentioning

confidence: 99%

“…Gusarov et al,4 bringing to the fore that fabricating shorter-length optical-amplifiers leads to radiation-resistant EDFA. However, this rule is to be weighted with the value of the RIA.…”

Section: In-line Gain Measurements Under Radiationmentioning

confidence: 99%

Radiation-resistant erbium-doped optical fiber for space applications

et al. 2012

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In the last decade, there has been increased interest in photonic technology for new satellite applications. One critical issue is the high sensitivity to radiative environments of the Erbium Doped Fiber (EDF). It leads to a radiation-induced absorption (RIA) that is not due to erbium content but mainly to the aluminium that ensures the erbium inclusion in glass. As the radiation induced losses grow as an exponential function of fiber length, the principal way so far to reduce EDFA degradation has consisted in increasing erbium concentration using conventional doping techniques. However, this is limited by the quenching effect, which impacts the fiber length needed to reach high gain, but also by the Aluminium-induced RIA. It has been recently proposed an original nanoparticle (NP) doping approach, which allows codopant content decrease with reduced quenching impact, while keeping EDF amplifying performances. A radiation-resistant amplifier can thus be designed as a "quenching-free", heavily-erbium-doped amplifier with low RIA.We demonstrate for the first time an aluminium-free EDF, exhibiting low quenching and low RIA. Despite the lack of aluminium, using silica NPs allows an erbium concentration close to the one of standard EDFs (200 ppm). This fiber is compared to a 1400 ppm Erbium-doped optical fiber with a strong aluminium concentration. Whereas the two fibers exhibit similar initial optical gain (15 dB under saturation conditions), the NP doped Al-free EDF shows only 2 dB gain reduction after a 600 Gy gamma deposit, while the Al/Er EDF incurs more than 10 dB gain degradation.

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“…Other studies characterized the response of actively-pumped Er-doped optical fibers [7][8][9]. Fewer studies have been carried out on the Er/Yb doped amplifiers.…”

Section: Introductionmentioning

confidence: 99%

Radiation hardening techniques for rare-earth-based optical fibers and amplifiers

et al. 2012

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Er/Yb doped fibers and amplifiers have been shown to be very radiation sensitive, limiting their integration in space. We present an approach including successive hardening techniques to enhance their radiation tolerance. The efficiency of our approach is demonstrated by comparing the radiation responses of optical amplifiers made with same lengths of different rare-earth doped fibers and exposed to gamma-rays. Previous studies indicated that such amplifiers suffered significant degradation for doses exceeding 10 krad. Applying our techniques significantly enhances the amplifier radiation resistance, resulting in a very limited degradation up to 50 krad. Our optimization techniques concern the fiber composition, some possible pre-treatments and the interest of simulation tools used to harden by design the amplifiers. We showed that adding cerium inside the fiber phosphosilicate-based core strongly decreases the fiber radiation sensitivity compared to the standard fiber. For both fibers, a pre-treatment with hydrogen permits to enhance again the fiber resistance. Furthermore, simulations tools can also be used to improve the tolerance of the fiber amplifier by helping identifying the best amplifier configuration for operation in the radiative environment.

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Radiation Sensitivity of EDFAs Based on Highly Er-Doped Fibers

Cited by 33 publications

References 15 publications

Radiation-hardened nano-particles-based Erbium-doped fiber for space environment

Radiation-hardened nano-particles-based Erbium-doped fiber for space environment

Radiation-resistant erbium-doped optical fiber for space applications

Radiation hardening techniques for rare-earth-based optical fibers and amplifiers

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