Abstract
The demand for tunable visible laser sources with high power and high beam quality, for application ranging from metrology to remote sensing, is constantly increasing. In this work, we report on the details of crystal growth, via the Czochralski method, and laser characterization of a Pr-doped Ba(YLu)F (BYLF) single crystal, which is a promising candidate for fulfilling these requirements, both in terms of tunability and high-power capabilities. We measured for the first time the laser tunability curve in the deep red region obtaining a continuous range of 17 nm. The laser emission of the three main Pr lines in the visible (orange, red, and deep red) was tested under increased pump power with respect to previous studies on this material, demonstrating output powers of more than 360 mW and no thermal rolloff, up to 1.9 W of absorbed power.
Highlights
The development of compact, reliable, long-life solid-state visible laser sources with a high output beam quality has become of utmost importance in recent decades due to the countless applications they have in fundamental research, medicine and surgery, entertainment, environmental monitoring, and metrology [1,2]
We report on the details of crystal growth, via the Czochralski method, and laser characterization of a Pr-doped Ba(Y1− x Lux )2 F8 (BYLF) single crystal, which is a promising candidate for fulfilling these requirements, both in terms of tunability and high-power capabilities
In this paper we describe the growth of single-crystal Pr:BYLF and present interesting results on deep-red wavelength tunability and visible laser output power performances in the orange, red, and deep red lines of Pr3+
Summary
The development of compact, reliable, long-life solid-state visible laser sources with a high output beam quality (nearly TEM00 ) has become of utmost importance in recent decades due to the countless applications they have in fundamental research, medicine and surgery, entertainment, environmental monitoring, and metrology [1,2]. Solid-state lasers have a reduced emission linewidth (at least two orders of magnitude narrower than that emitted by diode lasers). The emission wavelength can be widely tuned. The combination of these two properties make these devices appealing for the excitation of the transitions of 87 Sr0 and 88 Sr+ for the development of compact and reliable optical atomic clocks [3,4]. The most promising active ion for visible laser emission is certainly praseodymium, given the multitude of transition accessible, and the possibility to pump it with inexpensive blue laser diodes. In fluorides, visible laser emission was extensively demonstrated in several different crystal hosts [5,6,7,8]
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