Upconversion luminescence and optical thermometry behaviors of Yb and Ho co-doped GYTO crystal.

Optical thermometry based on the upconversion (UC) luminescence intensity ratio (LIR) has attracted considerable attention because of its feasibility for achievement of accurate non-contact temperature measurement. Compared with traditional UC phosphors, optical thermometry based on UC single crystals can achieve faster response and higher sensitivity due to the stability and high thermal conductivity of the single crystals. In this study, a high-quality 5 at% Yb and 1 at% Ho co-doped GdYTaO single crystal was grown by the Czochralski (Cz) method, and the structure of the as-grown crystal was characterized.

High-peak-power electro-optically Q-switched laser with a gradient-doped Nd:YAG crystal.

We report on a high-peak-power electro-optically -switched laser emitting a near-diffraction-limited beam profile at 1064 nm by using a gradient-doped Nd:YAG crystal. The gradient-doped crystal features a unique combination of a reduced thermal lens effect through effectively spreading the heat load distribution within its volume. Its performance is compared with those of Nd:YAG crystals with uniform volume doping distribution operating in the -switched regime with the same laser configuration, demonstrating the higher average and peak power achievable with the gradient-doped crystal.

High-power actively Q-switched Ho-doped gadolinium tantalate laser.

In this paper, we present the acousto-optical (AO) Q-switched performance of a holmium (Ho):gadolinium tantalate (GdTaO) (Ho:GTO) laser pumped by a thulium (Tm)-fiber laser emitting at 1.94 µm. In the efficient continuous wave (CW) regime, a maximum output power of 30.

High efficiency single-longitudinal-mode resonantly-pumped Ho:GdTaO laser at 2068nm.

Based on Faraday effect we demonstrate a thulium fiber pumped continuous-wave single-longitudinal-mode laser with a new Ho:GdTaO crystal. By inserting a faraday rotator and a half-wave plate into the laser cavity, the single-longitudinal-mode output power of 392 mW at wavelength of 2068.33 nm was obtained in unidirectional Ho:GdTaO ring laser, corresponding to a slope efficiency of 60.

Resonantly pumped high efficiency Ho:GdTaO laser: erratum.

An erratum is presented to correct the wrong picture in our paper.

Resonantly pumped high efficiency Ho:GdTaO laser.

We demonstrate a continuous-wave 2.1-µm laser with a new Ho:GdTaO crystal pumped by a 1940.3-nm Tm fiber laser at room temperature.

Investigation on 1.3 μm laser performance with Nd:GdYTaO and Nd:GdYNbO mixed crystals.

Laser performances around 1.3 μm are investigated in 879 nm laser diode (LD) end pumped Nd doped mixed crystals with Nd:GdYTaO and Nd:GdYNbO crystals for the first time to our best knowledge. The maximum average power in LD end pumped Nd:GdYTaO 1328 nm laser reaches 435 mW at 50 Hz with an optical-to-optical efficiency of 5.

Continuous-wave and pulsed 1,066-nm Nd:GdYTaO laser directly pumped by a 879-nm laser diode.

We demonstrated an 879-nm-diode-pumped Nd:GdYTaO laser in continuous-wave-(CW), pulse-pumped, pulse-reflection-mode Q-switched, and cavity-dumped burst-mode Q-switched operations for the first time. A maximum output power of 9.3 W at 1,066 nm was obtained in the CW operation with a slope efficiency of ~48%.

Spectroscopic properties and diode end-pumped 2.79 μm laser performance of Er,Pr:GYSGG crystal.

We demonstrate a 968 nm diode end-pumped Er,Pr:GYSGG (Gd₁.₁₇Y₁.₈₃Sc₂Ga₃O₁₂) laser at 2.