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Non-stop sign achieved in high-power Erbium-doped mid-infrared lasers

Fig. 1. Schematic of LD side-pumped Er(Pr):YAP laser. Credit: QUAN Cong

The Mid-infrared lasers (MIR) with excessive peak energy and excessive repetition price working within the vary of two.7~3 μm have necessary utility in laser surgical procedure and optical parametric oscillator (OPO).

A current examine performed by Sun Dunlu’s analysis group on the Hefei Institutes of Physical Science (HFIPS) of the Chinese Academy of Sciences (CAS) achieved excessive energy, high efficiency and quasi-continuous mid-infrared laser within the free working and langasite [La3Ga5SiO14 (LGS)] Q-switched modes by utilizing the Er3+ ions-doped YAP crystals as laser achieve medium.

Based on their earlier analysis work on laser, the researchers additional improved the laser efficiency of Er:YAP laser crystal by laser-diode (LD) side-pumping methodology, a Er:YAP crystal rod with concave end-faces was used to compensate the thermal lensing impact. The most output powers of 26.75 W have been achieved at 250 Hz, and 13.18 W at 1000 Hz, which is the very best working frequency in all of the LD side-pumped Er-doped MIR laser up to now.

In addition, they demonstrated a LD side-pumped and electro-optical Q-switched Er,Pr:YAP laser with emission at 2.7 μm. A large pulse laser was obtained with pulse vitality of 20.5 mJ, pulse width of 61.4 ns, and peak energy of 0.33 MW on the highest working frequency of 150 Hz.

These outcomes point out that the Er3+-doped YAP crystals are promising candidate for the high power and excessive frequency mid-infrared laser system, which possess nice potential for the appliance of dental ablation surgical procedure and OPO pump supply.

Non-stop signal achieved in high-power Er3+-doped mid-infrared lasers
Fig. 2. Average output energy of LD side-pumped Er:YAP laser versus pump energy at totally different working frequencies and pump pulse widths. Credit: QUAN Cong

Scientists grow novel Er3+ doped LuSGG mid-infrared laser crystal

More info:
Cong Quan et al, 13-W and 1000-Hz of a 27-µm laser on the 968 nm LD side-pumped Er:YAP crystal with concave end-faces, Optics Express (2021). DOI: 10.1364/OE.428874

Cong Quan et al, Performance of a 968-nm laser-diode side-pumped, electro-optical Q-switched Er,Pr:YAP laser with emission at 2.7 μm, Optical Engineering (2021). DOI: 10.1117/1.OE.60.6.066112

Non-stop sign achieved in high-power Erbium-doped mid-infrared lasers (2021, July 1)
retrieved 1 July 2021
from https://phys.org/news/2021-07-non-stop-high-power-erbium-doped-mid-infrared-lasers.html

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