Ghosh, Sudipta and Das, Shyamal and Paul, Mukul Chandra and Dasgupta, Kamal and Bohra, Dinesh and Chaudhary, Himat S and Panwar, Lalit and Bhatnagar, Pradeep K and Vaijapurkar, Shyam Govind (2011) Evaluation of the performance of high phosphorous with germanium codoped multimode optical fiber for use as a radiation sensor at low dose rates. Applied Optics, 50 (25). E80-E85. ISSN 0003-6935

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We propose a GeO(2)-P(2)O(5)-codoped step index multimode (SIMM) fiber having a core diameter of around 50 mu m with numerical aperture of around 0.21-0.22. The proposed SIMM fiber shows excellent linear radiation response behavior with sensitivity of around 0.69-0.97 dB/m/100 rad at a 505 nm wavelength within the dose rate range of 10-100 rad/h, as well as very low recovery at room temperature using a (60)Co gamma radiation source. This enables its practical application in fiber optic personal dosimeters for measurement of low dose gamma radiation. (C) 2011 Optical Society of America

Item Type: Article
Uncontrolled Keywords: Remote sensing and sensors; Fiber optics and optical communications; Fiber materials; Defect-center materials
Subjects: Electronics
Divisions: Fiber Optics and Photonics
Depositing User: Bidhan Chaudhuri
Date Deposited: 16 Jan 2012 12:10
Last Modified: 25 Feb 2013 08:04

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