Optics Letters, volume 46, issue 22, pages 5707

Laser cooling of a Yb doped silica fiber by 18 Kelvin from room temperature

Brian Topper ¹

Mostafa Pouyakian ¹

Alexander Albrecht ¹

Angel S Flores ²

Stefan Kuhn ³

Denny Häßner ³

Sigrun Hein ³

Christian Hupel ³

Johannes Nold ³

Nicoletta Haarlammert ³

THOMAS SCHREIBER ³

Mansoor Sheik-Bahae ¹

Arash Mafi ¹

Show full list: 13 authors

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University Of New Mexico |

Air Force Research Laboratory

Fraunhofer Institute for Applied Optics and Precision Engineering |

Publication type: Journal Article

Publication date: 2021-11-11

Optica Publishing Group

Journal: Optics Letters

scimago Q1

wos Q2

SJR: 1.040

CiteScore: 6.6

Impact factor: 3.1

ISSN: 01469592, 15394794

DOI: 10.1364/ol.444709

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Atomic and Molecular Physics, and Optics

Abstract

An ytterbium doped silica optical fiber with a core diameter of 900µm has been cooled by 18.4 K below ambient temperature by pumping with 20 W of 1035 nm light in vacuum. In air, cooling by 3.6 K below ambient was observed with the same 20 W pump. The temperatures were measured with a thermal imaging camera and differential luminescence thermometry. The cooling efficiency is calculated to be 1.2±0.1%. The core of the fiber was codoped with Al3+ for an Al to Yb ratio of 6:1, to allow for a larger Yb concentration and enhanced laser cooling.

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Publisher

Optica Publishing Group

Journal

Optics Letters

scimago Q1

wos Q2

SJR

1.040

CiteScore

6.6

Impact factor

3.1

ISSN

01469592 (Print)

15394794 (Electronic)

Laser cooling of a Yb doped silica fiber by 18 Kelvin from room temperature

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