Evaluation of the performance of high phosphorous with germanium codoped multimode optical fiber for use as a radiation sensor at low dose rates

Ghosh, Sudipta; Das, Shyamal; Paul, Mukul Chandra; Dasgupta, Kamal; Bohra, D.; Chaudhary, Himat S; Panwar, Lalit; Bhatnagar, Pradeep K; Vaijapurkar, S.G.

doi:10.1364/ao.50.000e80

Cited by 11 publications

(2 citation statements)

References 23 publications

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“…Pure silica core fibers are known to be relatively resistant to radiation, [ 125 ] with fluorine (F) enhancing radiation resistance, [ 126 ] and germanium (Ge) dopants increasing the radiation sensitivity. [ 127 ] Toccafondo carefully evaluated three different P‐doped optical fibers which could be suitable candidates for radiation sensing systems. Phosphorous (P) doped or Ge + P doped fiber showed several key features which made them particularly attractive for radiation sensing, such as linear response range from mGy to a couple of kGy and low annealing profile to enable recovery of the dose information following an extended exposure time.…”

Section: Applicationsmentioning

confidence: 99%

Fabrication and Application of Single Crystal Fiber: Review and Prospective

Liu

Ohodnicki

2021

Adv Materials Technologies

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The state of the art of single crystal fiber (SCF) fabrication has evolved and improved over the last five decades. Nowadays, edge‐defined film‐feed growth, micro‐pulling down, and laser heated pedestal growth are three major techniques for the fabrication of SCF. Solid state crystal growth and temperature gradient technology are also very active recently making small size SCF. These optical fiber growth techniques are powerful material research tools employed globally for both scientific inquiry and practical applications. This article introduces the development of SCF growth techniques, with particular emphasis on recent practical applications including temperature sensing, radiation environment sensing, fiber laser and power delivery, chemical and medical application, imaging application, and piezoelectric application. In all cases, the application‐oriented point of view provides the reader with an up‐to‐date panorama of the vast possibilities offered by SCF. In the end, perspectives on the trends and future development of single crystal fibers are discussed.

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Section: Applicationsmentioning

confidence: 99%

Fabrication and Application of Single Crystal Fiber: Review and Prospective

Liu

Ohodnicki

2021

Adv Materials Technologies

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“…However, a dose rate dependency is generally observed increasing the uncertainty in the dose estimation. It is also worth mentioning Ge+P (Germanium + Phosphorous) fibers which may be more suitable for dosimetry thanks to the interesting characteristics of the P-dopant when irradiated as explained below [8].…”

Section: Icso 2014mentioning

confidence: 99%

First steps towards a distributed optical fiber radiation sensing system

Toccafondo

Brügger

Pasquale

et al. 2017

International Conference on Space Optics — ICSO 2014

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Ionizing radiations affect installed electronics, limit equipment lifetimes and eventually alter materials both in space applications as well as high energy accelerators and physics experiments. In order to monitor radiation levels and predict equipment and material lifetimes, an accurate radiation dosimetry is highly important and very challenging often due to two main reasons: (i) large areas and (ii) extended dose range of interest. In this respect a radiation sensor based on a distributed optical fiber sensing system could be a promising solution. Such sensor systems are immune to electromagnetic field interference, have a light weight and small size making them suitable for a large number of applications including possible future space missions. In addition, optical fiber sensors have reached a very high accuracy in measuring physical quantities as a function of distance very accurately with metre or sub-metre-scale spatial resolutions. Their distributed nature in fact, is particularly suitable for real-time monitoring of long distances as particles accelerator tunnels like the one of the Large Hadron Collider (LHC) or large space stations as the International Space Station (ISS) which, to the best of our knowledge, only holds punctual radiation sensors as passive radiation dosimeters (PRD) among many others. The first step of the feasibility study of a distributed optical fiber radiation sensing system consists in characterizing and selecting the most suitable optical fiber which represents the sensing mean of the system. The effect of ionizing radiation on optical fibers has been well documented in literature and already several decades ago it was known that an irradiated fiber will suffer from radiation induced attenuation (RIA). Depending on the fiber’s type and composition the RIA shows varying response to total dose, dose rate, temperature, wavelength and light power. In the case of P-doped fibers, the radiation response is independent from the dose rate the fiber is exposed to, which makes it suitable for sensing a wide range of different radiation environments. Moreover, P-doped fibers have a low annealing behavior and their RIA doesn’t show any strong temperature dependence for room temperature environments. All the above mentioned parameters affecting the RIA are important in order to fully characterize fiber candidates to be used for dosimetry and will be detailed in the next section. Based on the above considerations, in this paper we investigate the response to ionizing radiation of three different P-doped optical fibers which could be suitable candidates for the radiation sensing system. Two of the fibers were single mode (SM) and the RIA has been studied at 1312 nm and 1570 nm as a function of the total dose up to about 18 kGy and with a dose rate of 46.7 mGy/s in one case and almost 60 kGy at 153 mGy/s in the other. The third fiber which was a multimode (MM) one has been tested at 830 nm and 1312 nm and has been irradiated with dose rates ranging from 0.5 mGy/s up to almost 1.7 Gy/s reaching ...

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Optical Fiber Sensors in Ionizing Radiation Environments

Sporea

2017

Handbook of Optical Fibers

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Evaluation of the performance of high phosphorous with germanium codoped multimode optical fiber for use as a radiation sensor at low dose rates

Cited by 11 publications

References 23 publications

Fabrication and Application of Single Crystal Fiber: Review and Prospective

Fabrication and Application of Single Crystal Fiber: Review and Prospective

First steps towards a distributed optical fiber radiation sensing system

Optical Fiber Sensors in Ionizing Radiation Environments

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