Modeling of mechanisms for the creation of an internal clad in sapphire optical fiber using the 6Li(n,α)3H reaction

Brandon A. Wilson; Joshua T. Jones; Anthony Birri; Thomas E. Blue; Osgar John Ohanian

doi:10.1117/12.2518432

Modeling of mechanisms for the creation of an internal clad in sapphire optical fiber using the ⁶Li(n,α)³H reaction

Brandon A. Wilson, Joshua T. Jones, Anthony Birri, Thomas E. Blue, Osgar John Ohanian

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

3 Scopus citations

Abstract

The focus of this work is to model the creation of a cladding, which is internal to a sapphire optical fiber, by irradiating a sapphire fiber, that is surrounded by an annulus of Li-6 enriched lithium carbonate powder, in a nuclear reactor. Such a fiber has been created using the Ohio State University Research Reactor. The ⁶Li(n,α)³H reaction creates high energy tritons and alpha particles that irradiate the fiber simultaneously to a depth of 24 microns, along the entire periphery of the sapphire fiber. The irradiation slightly reduces the index of refraction in the fiber's periphery, thus creating a refractive cladding within the fiber. The Monte Carlo radiation transport code MCNP was used in combination with SRIM/TRIM to predict the modification of the fiber that results from the irradiation. Our analysis predicts that whether it is displacement damage or the density of implanted ions that is responsible for the modification of Î•, or a combination of both, the irradiation yields a graded index in the fiber, with Î• decreasing monotonically from the value of the native sapphire 24 micrometers from the surface of the fiber to a minimum value at the surface of the fiber.

Original language	English
Title of host publication	Micro- and Nanotechnology Sensors, Systems, and Applications XI
Editors	Thomas George, M. Saif Islam
Publisher	SPIE
ISBN (Electronic)	9781510626294
DOIs	https://doi.org/10.1117/12.2518432
State	Published - 2019
Externally published	Yes
Event	2019 Micro- and Nanotechnology (MNT) Sensors, Systems, and Applications XI Conference - Baltimore, United States Duration: Apr 14 2019 → Apr 18 2019

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	10982
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	2019 Micro- and Nanotechnology (MNT) Sensors, Systems, and Applications XI Conference
Country/Territory	United States
City	Baltimore
Period	04/14/19 → 04/18/19

Funding

The authors would like to thank the Department of Energy for funding this research. This material is based upon work supported by the Department of Energy, Office of Science, Office of Energy Efficiency and Renewable Energy under Award Number DE-SC0018767. This work was also supported by the Department of Energy’s Nuclear Energy Enabling Technologies Program: Sensors and Instrumentation for Data Generation. A. Birri was supported by a Department of Energy Integrated University Program Fellowship.

Keywords

Fiber optic
Graded refractive index
Sapphire
Single mode

Access to Document

10.1117/12.2518432

Cite this

Wilson, B. A., Jones, J. T., Birri, A., Blue, T. E., & Ohanian, O. J. (2019). Modeling of mechanisms for the creation of an internal clad in sapphire optical fiber using the ⁶Li(n,α)³H reaction. In T. George, & M. S. Islam (Eds.), Micro- and Nanotechnology Sensors, Systems, and Applications XI Article 109822M (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10982). SPIE. https://doi.org/10.1117/12.2518432

Wilson, Brandon A. ; Jones, Joshua T. ; Birri, Anthony et al. / Modeling of mechanisms for the creation of an internal clad in sapphire optical fiber using the ⁶Li(n,α)³H reaction. Micro- and Nanotechnology Sensors, Systems, and Applications XI. editor / Thomas George ; M. Saif Islam. SPIE, 2019. (Proceedings of SPIE - The International Society for Optical Engineering).

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title = "Modeling of mechanisms for the creation of an internal clad in sapphire optical fiber using the 6Li(n,α)3H reaction",

abstract = "The focus of this work is to model the creation of a cladding, which is internal to a sapphire optical fiber, by irradiating a sapphire fiber, that is surrounded by an annulus of Li-6 enriched lithium carbonate powder, in a nuclear reactor. Such a fiber has been created using the Ohio State University Research Reactor. The 6Li(n,α)3H reaction creates high energy tritons and alpha particles that irradiate the fiber simultaneously to a depth of 24 microns, along the entire periphery of the sapphire fiber. The irradiation slightly reduces the index of refraction in the fiber's periphery, thus creating a refractive cladding within the fiber. The Monte Carlo radiation transport code MCNP was used in combination with SRIM/TRIM to predict the modification of the fiber that results from the irradiation. Our analysis predicts that whether it is displacement damage or the density of implanted ions that is responsible for the modification of {\^I}•, or a combination of both, the irradiation yields a graded index in the fiber, with {\^I}• decreasing monotonically from the value of the native sapphire 24 micrometers from the surface of the fiber to a minimum value at the surface of the fiber.",

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Wilson, BA, Jones, JT, Birri, A, Blue, TE & Ohanian, OJ 2019, Modeling of mechanisms for the creation of an internal clad in sapphire optical fiber using the ⁶Li(n,α)³H reaction. in T George & MS Islam (eds), Micro- and Nanotechnology Sensors, Systems, and Applications XI., 109822M, Proceedings of SPIE - The International Society for Optical Engineering, vol. 10982, SPIE, 2019 Micro- and Nanotechnology (MNT) Sensors, Systems, and Applications XI Conference, Baltimore, United States, 04/14/19. https://doi.org/10.1117/12.2518432

Modeling of mechanisms for the creation of an internal clad in sapphire optical fiber using the ⁶Li(n,α)³H reaction. / Wilson, Brandon A.; Jones, Joshua T.; Birri, Anthony et al.
Micro- and Nanotechnology Sensors, Systems, and Applications XI. ed. / Thomas George; M. Saif Islam. SPIE, 2019. 109822M (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10982).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Ohanian, Osgar John

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N2 - The focus of this work is to model the creation of a cladding, which is internal to a sapphire optical fiber, by irradiating a sapphire fiber, that is surrounded by an annulus of Li-6 enriched lithium carbonate powder, in a nuclear reactor. Such a fiber has been created using the Ohio State University Research Reactor. The 6Li(n,α)3H reaction creates high energy tritons and alpha particles that irradiate the fiber simultaneously to a depth of 24 microns, along the entire periphery of the sapphire fiber. The irradiation slightly reduces the index of refraction in the fiber's periphery, thus creating a refractive cladding within the fiber. The Monte Carlo radiation transport code MCNP was used in combination with SRIM/TRIM to predict the modification of the fiber that results from the irradiation. Our analysis predicts that whether it is displacement damage or the density of implanted ions that is responsible for the modification of Î•, or a combination of both, the irradiation yields a graded index in the fiber, with Î• decreasing monotonically from the value of the native sapphire 24 micrometers from the surface of the fiber to a minimum value at the surface of the fiber.

AB - The focus of this work is to model the creation of a cladding, which is internal to a sapphire optical fiber, by irradiating a sapphire fiber, that is surrounded by an annulus of Li-6 enriched lithium carbonate powder, in a nuclear reactor. Such a fiber has been created using the Ohio State University Research Reactor. The 6Li(n,α)3H reaction creates high energy tritons and alpha particles that irradiate the fiber simultaneously to a depth of 24 microns, along the entire periphery of the sapphire fiber. The irradiation slightly reduces the index of refraction in the fiber's periphery, thus creating a refractive cladding within the fiber. The Monte Carlo radiation transport code MCNP was used in combination with SRIM/TRIM to predict the modification of the fiber that results from the irradiation. Our analysis predicts that whether it is displacement damage or the density of implanted ions that is responsible for the modification of Î•, or a combination of both, the irradiation yields a graded index in the fiber, with Î• decreasing monotonically from the value of the native sapphire 24 micrometers from the surface of the fiber to a minimum value at the surface of the fiber.

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Wilson BA, Jones JT, Birri A, Blue TE, Ohanian OJ. Modeling of mechanisms for the creation of an internal clad in sapphire optical fiber using the ⁶Li(n,α)³H reaction. In George T, Islam MS, editors, Micro- and Nanotechnology Sensors, Systems, and Applications XI. SPIE. 2019. 109822M. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2518432