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Crystals 2017, 7(7), 200; doi:10.3390/cryst7070200

Growth by the μ-PD Method and Visible Laser Operation of a Single-Crystal Fiber of Pr3+:KY3F10

1
Dipartimento di Fisica, Università di Pisa, Largo B. Pontecorvo 3, 56127 Pisa, Italy
2
State Key Laboratory of Crystal Materials, Shandong University, 27 South Shanda Road, Jinan 250100, China
3
Dipartimento di Scienze Fisiche, della Terra e dell’Ambiente—Sezione di Fisica, Università di Siena, Via Roma 56, 53100 Siena, Italy
4
NEST, Istituto Nanoscienze—CNR, Piazza S. Silvestro 12, 56127 Pisa, Italy
5
PSL Research University, Chimie ParisTech, CNRS, Institut de Recherche de Chimie Paris, 11 Rue Pierre et Marie Curie, 75005 Paris, France
*
Author to whom correspondence should be addressed.
Academic Editor: Michel Ferriol
Received: 28 April 2017 / Revised: 29 June 2017 / Accepted: 29 June 2017 / Published: 2 July 2017
(This article belongs to the Special Issue Advances in Optical Crystal Fibers)
View Full-Text   |   Download PDF [696 KB, uploaded 2 July 2017]   |  

Abstract

We report on the first growth, spectroscopy, and visible laser operation of a single-crystal fiber (SCF) of KY3F10 (KYF) grown by the micro-pulling-down (μ-PD) method, doped with Pr3+ ions. This material has a cubic lattice, which makes it appealing for use in the industry. However, KYF crystals are considered difficult to grow with high optical quality, even with well-established methods. Nevertheless, we grew a 50-mm-long SCF of Pr:KYF, which was transparent in its inner part. We studied the spectroscopic features of it in comparison with existing literature and with samples of the same crystal grown by the Czochralski method, and we did not notice any large differences. These characterizations confirmed that is indeed possible to grow high-quality crystals of Pr:KYF by the μ-PD method. Unfortunately, the crystal proved to be more brittle than typical KYF and especially difficult to polish, leading to rough and irregular facets, as evidenced by transmission measurements. Despite these issues, we obtained continuous-wave laser operation in the orange, red, and deep red regions, using a sample carved from the SCF as active medium and an InGaN-based laser diode as pump source, though with lower performances than in existing reports on this crystal. View Full-Text
Keywords: solid-state lasers; visible lasers; single-crystal fibers; spectroscopy; micro-pulling-down; crystal growth; diode-pumped lasers; laser materials; praseodymium-based lasers solid-state lasers; visible lasers; single-crystal fibers; spectroscopy; micro-pulling-down; crystal growth; diode-pumped lasers; laser materials; praseodymium-based lasers
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Shu, J.; Damiano, E.; Sottile, A.; Zhang, Z.; Tonelli, M. Growth by the μ-PD Method and Visible Laser Operation of a Single-Crystal Fiber of Pr3+:KY3F10. Crystals 2017, 7, 200.

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