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Title: Design of a free-space image-relay optical time-domain reflectometer to measure fiber-optic time delays at inertial confinement fusion relevant wavelengths

Abstract

Fiber optics are an integral part of data collection, often used to transport visible and UV light to streaked spectrometers and photodetectors. Precisely measuring fiber-optic time delay (FOTD) is necessary for absolute data timing or fiber replacement. An optical time domain reflectometer (OTDR) can be used to measure the fiber-optic time delay. Commercial OTDR’s measure only the fiber in telecommunications wavelengths in the IR. To measure fibers at relevant wavelengths for inertial confinement fusion experiments, a solution using a free-space image relay was devised at the University of Rochester’s Laboratory for Laser Energetics (LLE), where readily available equipment has been used to measure the FOTD to within 2 ps at 526.5 nm as well as 351 nm, which is an order of magnitude better than the timing jitter between LLE’s Hardware Timing System and second-harmonic (526.5-nm) fiducial laser pulses.

Authors:
 [1];  [1]
  1. Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Research Org.:
Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
Contributing Org.:
Univ. of Rochester, Rochester, NY (United States). Lab. for Laser Energetics
OSTI Identifier:
1568764
Grant/Contract Number:  
NA0003856
Resource Type:
Accepted Manuscript
Journal Name:
Proc. SPIE
Additional Journal Information:
Journal Volume: 11114; Conference: SPIE Optical Engineering and Applications, San Diego, CA (United States), 11-15 Aug 2019
Country of Publication:
United States
Language:
English
Subject:
Timing; fiber optic; inertial confinement fusion (ICF); optical; visible; ultraviolet (UV); graded index fiber; diagnostics; photodiode; photodetector

Citation Formats

Filkins, Timothy, and Katz, Joseph. Design of a free-space image-relay optical time-domain reflectometer to measure fiber-optic time delays at inertial confinement fusion relevant wavelengths. United States: N. p., 2019. Web. doi:10.1117/12.2528806.
Filkins, Timothy, & Katz, Joseph. Design of a free-space image-relay optical time-domain reflectometer to measure fiber-optic time delays at inertial confinement fusion relevant wavelengths. United States. doi:10.1117/12.2528806.
Filkins, Timothy, and Katz, Joseph. Mon . "Design of a free-space image-relay optical time-domain reflectometer to measure fiber-optic time delays at inertial confinement fusion relevant wavelengths". United States. doi:10.1117/12.2528806.
@article{osti_1568764,
title = {Design of a free-space image-relay optical time-domain reflectometer to measure fiber-optic time delays at inertial confinement fusion relevant wavelengths},
author = {Filkins, Timothy and Katz, Joseph},
abstractNote = {Fiber optics are an integral part of data collection, often used to transport visible and UV light to streaked spectrometers and photodetectors. Precisely measuring fiber-optic time delay (FOTD) is necessary for absolute data timing or fiber replacement. An optical time domain reflectometer (OTDR) can be used to measure the fiber-optic time delay. Commercial OTDR’s measure only the fiber in telecommunications wavelengths in the IR. To measure fibers at relevant wavelengths for inertial confinement fusion experiments, a solution using a free-space image relay was devised at the University of Rochester’s Laboratory for Laser Energetics (LLE), where readily available equipment has been used to measure the FOTD to within 2 ps at 526.5 nm as well as 351 nm, which is an order of magnitude better than the timing jitter between LLE’s Hardware Timing System and second-harmonic (526.5-nm) fiducial laser pulses.},
doi = {10.1117/12.2528806},
journal = {Proc. SPIE},
number = ,
volume = 11114,
place = {United States},
year = {2019},
month = {9}
}

Journal Article:
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This content will become publicly available on September 9, 2020
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