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

Non-stop signal achieved in high-power Er3+-doped mid-infrared lasers
Fig. 1. Schematic of LD side-pumped Er(Pr):YAP laser. Credit: QUAN Cong

The Mid-infrared lasers (MIR) with high peak power and high repetition rate operating in the range of 2.7~3 μm have important application in laser surgery and optical parametric oscillator (OPO).

A recent study conducted by Sun Dunlu's research group at the Hefei Institutes of Physical Science (HFIPS) of the Chinese Academy of Sciences (CAS) achieved high power, and quasi-continuous mid-infrared in the free running and langasite [La3Ga5SiO14 (LGS)] Q-switched modes by using the Er3+ ions-doped YAP crystals as laser gain medium.

Based on their previous research work on laser, the researchers further improved the laser performance of Er:YAP laser crystal by laser-diode (LD) side-pumping method, a Er:YAP crystal rod with concave end-faces was used to compensate the thermal lensing effect. The maximum output powers of 26.75 W were achieved at 250 Hz, and 13.18 W at 1000 Hz, which is the highest working frequency in all the LD side-pumped Er-doped MIR laser so far.

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

These results indicate that the Er3+-doped YAP crystals are promising candidate for the and high frequency mid- device, which possess great potential for the application of dental ablation surgery and OPO pump source.

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

Explore further

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More information: 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

Journal information: Optics Express

Citation: Non-stop signal achieved in high-power Erbium-doped mid-infrared lasers (2021, July 1) retrieved 20 October 2021 from https://phys.org/news/2021-07-non-stop-high-power-erbium-doped-mid-infrared-lasers.html
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