Cr: Tm: Ho: YAG; 2094nm; HTC:YAG-manufacture,factory,supplier from China

1. 4  ~ 3 μm laser crystals doped with Er2+, U4+, Ho3+, Dy3+  As an active ion, Ho3+ has achieved laser output in the ~3 μm band (5I6→5I7). In 1976, researchers first realized 2.9 μm laser output in Ho:YAP crystal. In 1990, Bowman et al. obtained 2.85 μm and 2.92 μm laser outputs in Ho:YAP crystals, and obtained 2.92 μm band-tuned laser outputs in Ho:YAP crystals in the following year. In 2017, Nie et al. pumped Ho, Pr: LiLuF4 crystals with a 1 150 nm Raman fiber laser, achieving 2.95 μm watt-level laser output for the first time. In 2018, Zhang et al.

In 1962, the American scientist McClung F J reported for the first time that the silver mirror of the ruby laser resonator had hole burning damage, which was the first public report on the laser damage of optical components. The subsequent invention of Q-switching technology and mode-locking technology increased the peak power of laser pulses by several orders of magnitude. The problem of laser damage runs through and affects the design and operation of lasers, and promotes the development of optical materials and optical component manufacturing technologies.

3 The main application of lithium tantalate crystal3.1 SAW Wave filterThere are many studies on filters in SAW devices. Wave filters have the advantages of low transmission loss, high reliability, great manufacturing flexibility, analog/digital compatibility, excellent frequency selection characteristics, and can realize a variety of complex functions.

2-5 μm mid-infrared laser crystals have important applications in directional infrared countermeasures, anti-terrorism, biomedicine, environmental monitoring, optical communications, strong field physics, laser fusion, and mid-to-far infrared (nonlinear frequency conversion) basic light sources, etc. With the related development of the pump source technology of semiconductor laser (laser diode, LD), solid-state laser and fiber laser (including resonant pump), mid-infrared crystal has become one of the four main laser crystals developed currently.

Based on the basic principles of laser damage, researchers have found a breaking through point to solve the problem of laser damage to optical components. But it is very difficult to effectively suppress the source of laser damage in the manufacturing process. Given the variety and complexity of the manufacturing process of optical components, it is necessary to establish the link between the defect formation and the manufacturing process.

3.4 Laser pretreatment of DKDP component The laser-damaged precursor of DKDP crystals (provided by WISOPTIC) is in the material body, so it is different from the removal of surface nodule defects in dielectric films. Laser pretreatment cannot remove the precursors in the body, but can only reduce the thermodynamic response of the precursors under laser radiation by improving their absorption intensity. There are still different opinions on this mechanism.

3.2 Laser Pretreatment TechnologyLaser pretreatment is a technology that uses sub-threshold laser energy flow to process components before they are practically used. It can effectively improve the ability of some optical components to resist laser damage. The main function of laser pretreatment is to remove defects or reduce thermodynamic response under laser irradiation.

Introduction 532nm solid-state lasers are widely used in industry and medicine. In the field of scientific research, continuous, high-stability 532nm green light and kilohertz, high-energy nanosecond 532nm laser are the most ideal pump source solutions for titanium sapphire oscillators and amplifiers respectively. The basic route is to use an 808nm/880nm semiconductor laser as the pump source, generate a 1064nm laser in an Nd:YVO4 or Nd:YAG crystal, and then perform frequency doubling (SHG) through a frequency doubling crystal to generate a continuous or pulsed 532nm laser.

WISOPTIC is using its newly-set coating machine to do in-house vacuum coatings on crystals and optical components.With our own coating machine and technique, we can provide customers products with excellent quality, e.g. higher surface quality, higher transmittance, and higher LIDT etc.Sorts of dielectric coatings (e.g. AR, HR, PR) are available for crystals (KDP/DKDP, KTP, RTP, BBO, LBO, LN, Nd:YAG, etc) and optical components (laser windows, mirrors, PBS, etc).

3 The main application of lithium tantalate crystal3.2 OscillatorAn oscillator is an energy conversion device that converts DC power into AC power with a certain frequency. This circuit is called an oscillation circuit. The oscillator achieves free oscillation through the mutual conversion between magnetic field energy and electric field energy.Oscillators are divided into RC oscillators, LC oscillators and crystal oscillators. The crystal oscillator has a piezoelectric effect, and the crystal will deform when a voltage is applied to the two poles of the wafer.