Efficient and scalable side pumping scheme for short high-power optical fiber lasers and amplifiers

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Abstract

A new and simple method of pumping short high-power optical fiber lasers and amplifiers is described. In our approach, several passive coreless optical fibers are brought into direct contact alongside a single rare-earth doped active fiber which constitutes the active medium of the laser (amplifier). Pump light is delivered through the passive coreless fibers and penetrates into the active fiber via evanescent field coupling. To enhance the pump absorption in the gain medium, high-order spatial modes are excited in the pump delivery fibers, and an active fiber with high concentration of the dopant ions is used. As a demonstration of the viability of our approach, test results are reported on a 12-cm-long Er+3-Yb+3 codoped phosphate glass fiber laser. The laser output reaches 5 W using 23-W pumping into six coreless fibers. Above threshold, the laser has ∼24% optical-to-optical conversion efficiency (with ∼64% being the theoretical maximum). The linearity of the input-output characteristic for the laser suggests that the output power can be scaled up by applying higher pump power.

Original languageEnglish (US)
Pages (from-to)2024-2026
Number of pages3
JournalIEEE Photonics Technology Letters
Volume16
Issue number9
DOIs
StatePublished - Sep 2004

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Pumping (laser)
Fiber amplifiers
Fiber lasers
fiber lasers
pumping
amplifiers
optical fibers
fibers
Fibers
Pumps
pumps
Lasers
lasers
Evanescent fields
Glass lasers
Light amplifiers
output
glass lasers
glass fibers
laser outputs

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy (miscellaneous)

Cite this

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title = "Efficient and scalable side pumping scheme for short high-power optical fiber lasers and amplifiers",
abstract = "A new and simple method of pumping short high-power optical fiber lasers and amplifiers is described. In our approach, several passive coreless optical fibers are brought into direct contact alongside a single rare-earth doped active fiber which constitutes the active medium of the laser (amplifier). Pump light is delivered through the passive coreless fibers and penetrates into the active fiber via evanescent field coupling. To enhance the pump absorption in the gain medium, high-order spatial modes are excited in the pump delivery fibers, and an active fiber with high concentration of the dopant ions is used. As a demonstration of the viability of our approach, test results are reported on a 12-cm-long Er+3-Yb+3 codoped phosphate glass fiber laser. The laser output reaches 5 W using 23-W pumping into six coreless fibers. Above threshold, the laser has ∼24{\%} optical-to-optical conversion efficiency (with ∼64{\%} being the theoretical maximum). The linearity of the input-output characteristic for the laser suggests that the output power can be scaled up by applying higher pump power.",
author = "Polynkin, {Pavel G} and Temyanko, {Valery L} and Masud Mansuripur and Peyghambarian, {Nasser N}",
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T1 - Efficient and scalable side pumping scheme for short high-power optical fiber lasers and amplifiers

AU - Polynkin, Pavel G

AU - Temyanko, Valery L

AU - Mansuripur, Masud

AU - Peyghambarian, Nasser N

PY - 2004/9

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N2 - A new and simple method of pumping short high-power optical fiber lasers and amplifiers is described. In our approach, several passive coreless optical fibers are brought into direct contact alongside a single rare-earth doped active fiber which constitutes the active medium of the laser (amplifier). Pump light is delivered through the passive coreless fibers and penetrates into the active fiber via evanescent field coupling. To enhance the pump absorption in the gain medium, high-order spatial modes are excited in the pump delivery fibers, and an active fiber with high concentration of the dopant ions is used. As a demonstration of the viability of our approach, test results are reported on a 12-cm-long Er+3-Yb+3 codoped phosphate glass fiber laser. The laser output reaches 5 W using 23-W pumping into six coreless fibers. Above threshold, the laser has ∼24% optical-to-optical conversion efficiency (with ∼64% being the theoretical maximum). The linearity of the input-output characteristic for the laser suggests that the output power can be scaled up by applying higher pump power.

AB - A new and simple method of pumping short high-power optical fiber lasers and amplifiers is described. In our approach, several passive coreless optical fibers are brought into direct contact alongside a single rare-earth doped active fiber which constitutes the active medium of the laser (amplifier). Pump light is delivered through the passive coreless fibers and penetrates into the active fiber via evanescent field coupling. To enhance the pump absorption in the gain medium, high-order spatial modes are excited in the pump delivery fibers, and an active fiber with high concentration of the dopant ions is used. As a demonstration of the viability of our approach, test results are reported on a 12-cm-long Er+3-Yb+3 codoped phosphate glass fiber laser. The laser output reaches 5 W using 23-W pumping into six coreless fibers. Above threshold, the laser has ∼24% optical-to-optical conversion efficiency (with ∼64% being the theoretical maximum). The linearity of the input-output characteristic for the laser suggests that the output power can be scaled up by applying higher pump power.

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