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Crystals
Special Issues
Advances in Optical Crystal Fibers
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Advances in Optical Crystal Fibers

A special issue of Crystals (ISSN 2073-4352).

Deadline for manuscript submissions: closed (15 October 2017)

Special Issue Editor

Prof. Dr. Michel Ferriol

E-Mail Website
Guest Editor
Université de Lorraine, LMOPS E.A. 4423, Metz, F-57070, France
Interests: crystal growth; crystal fibers; phase equilibria for high-order oxides systems; nonlinear optical materials; structural and physical characterization of optical crystal fibers

Special Issue Information

Dear Colleagues,

Since the eighties, crystal fibers have become a subject of intense study. The denomination of fiber usually means any material in elongated form with a small diameter from µm to mm. Besides their crystalline perfection and small dimensions, minimizing the structure defects, their shape confers remarkable characteristics to these crystals. Firstly, among the different existing laser media, crystal fibers are between bulk crystals and optical glass fibers. Longer and thiner than bulk crystals, but shorter and larger than a glass fiber, the crystal fiber presents long interaction lengths combined to a good control of temperature (cooling) allowing a maximum pump power compared to bulk crystals. Crystal fibers have also potential applications in the field of scintillating materials for the improvement of imaging techniques and design of new systems, for example: Crystal pixels for high resolution detectors.

We invite scientists to submit papers, which discuss their latest results about the crystal growth and characterization (crystal structure and quality, optical and physical properties) of crystal fibers in the following topics: Laser, nonlinear optical and scintillating materials. The volume is especially open for any innovative contribution involving all aspects of these topics.

Prof. Dr. Michel Ferriol
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Crystals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2100 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • crystal fiber
  • crystal growth
  • laser materials
  • nonlinear optical materials
  • scintillating materials

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

8 pages, 696 KiB  
Article
Growth by the μ-PD Method and Visible Laser Operation of a Single-Crystal Fiber of Pr3+:KY3F10
by Jun Shu, Eugenio Damiano, Alberto Sottile, Zhonghan Zhang and Mauro Tonelli
Crystals 2017, 7(7), 200; https://doi.org/10.3390/cryst7070200 - 2 Jul 2017
Cited by 9 | Viewed by 4684
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Advances in Optical Crystal Fibers)
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7 pages, 1226 KiB  
Article
High Power 1443.5 nm Laser with Nd:YAG Single Crystal Fiber
by Han Rao, Zhaojun Liu, Zhenhua Cong, Yang Liu, Yongyao Xie, Wenrui Li and Xingyu Zhang
Crystals 2017, 7(7), 189; https://doi.org/10.3390/cryst7070189 - 1 Jul 2017
Cited by 6 | Viewed by 5606
Abstract
A high-power eye-safe 1443.5 nm laser was demonstrated with an Nd:YAG single crystal fiber (SCF) as the gain medium. For continuous wave (CW) operation, a maximum output power of 13.3 W was obtained under an absorbed pump power of 95.0 W, corresponding to [...] Read more.
A high-power eye-safe 1443.5 nm laser was demonstrated with an Nd:YAG single crystal fiber (SCF) as the gain medium. For continuous wave (CW) operation, a maximum output power of 13.3 W was obtained under an absorbed pump power of 95.0 W, corresponding to an optical-to-optical conversion efficiency of 14.0%. For acousto-optically (AO) Q-switched regime, an output power of 1.95 W was obtained at a pulse repetition frequency (PRF) of 10 kHz. The pulse duration was 69.5 ns. The pulse energy and peak power were calculated to be 195 µJ and 2.81 kW, respectively. Full article
(This article belongs to the Special Issue Advances in Optical Crystal Fibers)
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