Compact Ho:YAP laser intra-cavity pumped by a Tm:YAP laser with identical crystallographic orientation

Compact intracavity-pumped Ho: YAG laser with near-diffraction-limited beam quality

“…In the same year, Huang et al established a Tm: YAP crystal intracavity pumped Ho: YAG laser system, obtaining a 0.8 W output power under pump diode power of about 10.5W, with beam quality factors M 2 of M x 2 = 2.18 and M y 2 = 1.87 [11]. In 2021, Deng et al demonstrated a diode laser pumped Tm: YAP crystal intracavitypumped Ho: YAP laser, with a maximum output power of 2.47 W at 2118 nm for b-cut Ho: YAP laser under the pump power was 22 W, a slope efficiency of 15.1%, and beam quality factors M 2 of 𝑀 𝑥 2 = 2.19 and 𝑀 𝑦 2 = 1.72 [12]. They also described a study on a-cut Ho: YAP laser intracavity-pumped by a Tm: YAP laser, achieving an output power of 1.08 W at 2130 nm, with a slope efficiency of 8.9%.…”

A high-performance passively Q-switched Tm:YAP laser with a TaSe2 saturable absorber

“…In recent years, pulsed lasers at 2 µm range have become a hot research topic due to their many advantages: the output wavelengths of the 2 µm lasers lie in the absorption peak of the water and human tissue, the laser is an eye-safe laser source, and the output power of the laser can be transmitted by a quartz fiber [1]. Owing to the performances of the 2 µm laser, the laser is extensively applied in atmospheric monitoring [2], optical sensors [3], the lidar system [4], coherent light detection and ranging [5], for medical use [6] and the pumping source of the optical parametric oscillator [7]. Passively Qswitched (PQS) technology is an effective method to realize pulsed lasers at 2 µm range due to its advances in simplicity, high efficiency, compactness, ease of adjustment and * Authors to whom any correspondence should be addressed.…”

Passive Q‐switched operation of Tm:YAP laser with a TaTe2 saturable absorber

“…Nowadays, all‐solid‐state short‐pulse lasers operating have been extensively researched at 2 µm waveband due to the waveband located in some biological tissue fluids, the higher absorption peak of water molecules, and atmospheric window, 1 so the laser source can be widely used in medical, 2 atmospheric monitoring, 3 optical sensors, 4,5 lidar system 6 coherent light detection and ranging, 7 and the pumping of optical parametric oscillators 8 . And another important use for high harmonic generation could be converted to shorter wavelengths reaching down to the vacuum ultraviolet and extreme ultraviolet spectral range by the driving laser light 9–14 .…”