Al-Zr fluoride glass for Ho^3+-Yb^3+ green upconversion

Shikida, Aki; Yanagita, Hiroaki; Toratani, Hisayoshi

doi:10.1364/josab.11.000928

Cited by 13 publications

References 13 publications

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Fiber Lasers and Amplifiers: High‐Power Operation

Zellmer

2005

Digital Encyclopedia of Applied Physics

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Since their invention in the beginning of the 1960s, fiber lasers have been improved from a helical shaped laser rod with an embedded waveguide structure to highly sophisticated laser systems that caused a revolution in telecommunications. In four decades of development, the wavelength range has been extended to the visible, ultraviolet, and mid‐infrared regime applying different rare earth–doped host glasses. Whereas diode laser pumped fiber lasers with emission in the visible spectral range became of great interest for applications in multimedia, measurement technique, medicine, and photofinishing, high‐power infrared, and high‐energy short‐pulse fiber lasers have been qualified for applications in thermal printing, marking, and material processing. However, nonlinear effects and the damage threshold of standard laser fibers hampered a straightforward scaling of the output power. Research is focused on these issues to develop scaling techniques for high‐power operation of infrared and visible upconversion fiber lasers in cw and pulsed modes. Nonlinear effects and power resistant fiber cores are factored into the fiber laser design. The fundamentals and the current state of the art of fiber lasers operating in the visible and infrared spectral ranges will be discussed in this work.

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Fiber Lasers and Amplifiers: High‐Power Operation

Zellmer

2005

Digital Encyclopedia of Applied Physics

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Laser Cooling in Fluoride Single Crystals

Bigotta

Tonelli

2009

Optical Refrigeration

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In the last decade, laser cooling of solids has evolved from an exotic scientific curiosity into a promising and challenging technology, thanks to the improvements in the crystal growth technologies and to innovative pumping schemes. We report the recent progress in the field obtained with fluoride single crystals doped with Tm and Yb. High optical quality fluoride single crystals allowed us to reach cooling efficiency as high as 3%. By using a resonant pumping cavity, a temperature drop of ∼ 70 K was observed. The room for improvements lets us think that temperature drops even larger than 100 K can be achieved.

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Faserlaser: Neuartige Laserstrahlquellen mit Emissionen im sichtbaren Spektralbereich

1996

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Seit uber 35 Jahren wird intensiv auf dem Gebiet der Laserentwicklung gearbeitet. Doch noch immer fehlen im sichtbaren Spektralbereich effiziente, leistungstarke, kontinuierliche Laserquellen hoher Strahlqualitiit, wie man sie heute fur eine Vielzahl von wissenschaftlichen und kommeniellen Anwendungen benotigt. Hervonuheben sind insbesondere Anwendungen in der Biologie, der Medizin, der Metrologie und der Spektroskopie, aber auch in der Druck-und Projektionstechnik. Der Markt fur derartige Lasersysteme wird derzeit auf etwa 100 Millionen US$ jahrlich geschatzt [I]. In der Konsequenz gehort heute die Entwicklung kompakter, leistungsstarker Lasersysteme mit Emissionen im sichtbaren Spektralbereich zu den aktivsten Forschungsgebieten auf dem Sektor der modernen, angewandten Quantenoptik. Der folgende Beitrag gibt einen Uberblick uber Konzepte zur Erzeugung von Laserstrahlung im roten, grunen und blauen Spektralbereich und konzentriert sich auf neuartige Faserlaser, die fur den sichtbaren Bereich interessante Perspektiven eroffnen. ~~ Dr. Andreas Tunnermann, Dr. Holger Zellmer und Prof. Dr. Herbert Welling, Laser Zentrum Hannover e. V., Hollerithallee 8, D-30419 Hannover. (H. Welling: Institut fur Quantenoptik, Universitiit Hannover, Welfengarten 1, D-30167 Hannover)

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Al-Zr fluoride glass for Ho^3+-Yb^3+ green upconversion

Cited by 13 publications

References 13 publications

Fiber Lasers and Amplifiers: High‐Power Operation

Fiber Lasers and Amplifiers: High‐Power Operation

Laser Cooling in Fluoride Single Crystals

Faserlaser: Neuartige Laserstrahlquellen mit Emissionen im sichtbaren Spektralbereich

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