Interlaboratory comparison of radiation-induced attenuation in optical fibers. III. Transient exposures

Abstract

A comparison of the losses induced in step-index multimode, graded-index multimode, and single-mode fibers by pulsed radiation exposure has been made among 12 laboratories over a period of five years. The recoveries of the incremental attenuations from to 10' s are reported. Although a standard set of measurement parameters was attempted, differences between the laboratories are evident; possible origins for these are discussed.

Recent Advances in Fiber Optics Components for High Speed Data Transmission

“…4,15,16,17 Work is in progress establishing future standards for measuring the effects of steady state and transient ionizing radiation on optical fibers. Measurements performed on multimode and single mode practical optical fibers reveal that radiation dose rates and injected optical power levels significantly influence induced attenuation in silica core fibers.…”

Accuracy of Analog Fiber-Optic Links for Inertial Confinement Fusion Diagnostics

“…Typical light power in the fiber was 10 mW; this light level is typical of the level required to fully drive modern, highbandwidth photoreceivers after demodulating the phase using an interferometer based on a 3 × 3 coupler as we have done. Prior studies [1] have suggested that this constitutes "high-power" operation of fiber links, but the design of a system around commercially available components and digitizers drives the decision to use approximately 1 mW per photoreceiver, with the optical signal typically split between two or more receivers.…”

“…For a 30-m fiber run, the transit time dominates this expression, so for the purposes of this study, we concern ourselves with effects only during the initial 150 ns. Survivability of the link over many shots is a separate concern that is addressed by a variety of studies in the literature [1], [2], [9].…”

“…Historically, studies of radiation effects on optical fibers have focused on degradation and recovery of the fibers' transmission properties; such work is either in the context of survivability of fibers in catastrophic conditions or suitability of fibers installed for command and control systems within an experimental facility [1], [2]. In this work, we consider links used to transmit realtime diagnostic data, and we analyze the error introduced by radiation effects during the drive pulse.…”

Comparaison des effets des irradiations γ, X et UV dans les fibres optiques

“…Ainsi, une fibre optique adéquate pour une application sous un environnement spécifique peut ne pas l'être pour un autre type d'irradiation. En particulier, la réponse transitoire (t < 100 ms) des fibres optiques après une impulsion ionisante est beaucoup moins documentée que celleà la dose cumulée [6][7][8]. Dans cet article, nous comparons la tenue de fibres commerciales ou issues de laboratoires R&Dà deux environnements possédant des débits de dose très différents (10 -1 Gy/s et > 10 6 Gy/s) mais des doses et desénergies comparables (< 1 kGy ; ∼1 MeV).…”