Laser performances of diode pumped Yb:Lu.sub.2./sub.O.sub.3./sub. transparent ceramic at cryogenic temperatures

David, Samuel Paul; Jambunathan, Venkatesan; Yue, Fangxin; Le Garrec, Bruno; Lucianetti, Antonio; Mocek, Tomáš

doi:https://dx.doi.org/10.1364/OME.9.004669

Number of the records: 1

Laser performances of diode pumped Yb:Lu.sub.2./sub.O.sub.3./sub. transparent ceramic at cryogenic temperatures

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SYSNO ASEP	0518033
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Laser performances of diode pumped Yb:Lu₂O₃ transparent ceramic at cryogenic temperatures
Author(s)	David, Samuel Paul (FZU-D)_ORCID Jambunathan, Venkatesan (FZU-D) Yue, Fangxin (FZU-D)_ORCID Le Garrec, Bruno (FZU-D) Lucianetti, Antonio (FZU-D)_{RID, ORCID} Mocek, Tomáš (FZU-D)_{RID, ORCID, SAI}
Number of authors	6
Source Title	Optical Materials Express. - : Optical Society of America - ISSN 2159-3930 Roč. 9, č. 12 (2019), s. 4669-4676
Number of pages	8 s.
Language	eng - English
Country	US - United States
Keywords	cryogenic temperature ; Yb:Lu₂O₃
Subject RIV	BH - Optics, Masers, Lasers
OECD category	Optics (including laser optics and quantum optics)
R&D Projects	EF15_006/0000674 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	LO1602 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Method of publishing	Limited access
Institutional support	FZU-D - RVO:68378271
UT WOS	000499348700018
EID SCOPUS	85077146207
DOI	10.1364/OME.9.004669
Annotation	Two different fiber coupled diode pump sources, one emitting around 975.7 nm volume Bragg grating (VBG) stabilized and another around 940 nm were used for comparison. Under the pump at 975.7 nm and 100 K cryogenic temperature, the laser yielded CW output power of 11.24 W for 20.3 W incident pump power, corresponding to an overall optical-to optical efficiency of 55%, the slope efficiency was 59%. For operation at room temperature, the output power was limited to 4.44 W whereas the slope efficiency was 27.5%. Optimum operation under 940 nm pump was obtained at 80 K. Under 940 nm pumping, Yb:Lu2O3 medium generated a CW output power of 3 W for 20 W, the slope efficiency was around 17%. The passive Q-switch operation was investigated with Cr4+:YAG saturable absorber (SA) crystal, employing the pump at 975.7 nm. Laser pulses with an energy of 0.35 mJ and a pulse duration of 116 ns at 26.1 kHz repetition rate were recorded with a Cr4+:YAG SA having 85% initial transmission.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2020
Electronic address	https://doi.org/10.1364/ome.9.004669

Number of the records: 1