Nd YAG-manufacture,factory,supplier from China

Conclusion Lithium tantalate material has a large pyroelectric coefficient, high Curie temperature, small dielectric loss factor, low heat melt per unit volume, small relative dielectric constant, and stable performance. It is a good ferroelectric and piezoelectric material. It also has extraordinary properties. Because of its linear optical properties, lithium tantalate (LT crystal, www.wisoptic.com) has gradually become a popular material used in communications, electronics and other fields.

3. Experimental EquipmentThe overall device diagram of the frequency doubling experiment is shown in Figure 3(a). The 1064nm continuous light passes through a half-wave plate and is directly focused into the CPPLN crystal by a lens. The generated frequency doubling light passes through a 532nm transparent filter and is received and detected by a power meter. The self-built LD-pumped Nd:YVO4 continuous laser used in the experiment can reach a maximum output power of 22.53W.

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.

1.

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.

03 Experimental results and analysisWhen the green light input power is lower than 4 W, the matching temperature of the BBO crystal has little effect on the output power of the quadrupled 266 nm laser, and when the optimal power of ultraviolet light output is achieved, the temperature offset ΔT of the heating device also tends to be consistent; when the green light input power is greater than 8 W, the higher the matching temperature of the BBO crystal (www.wisoptic.com), the smaller the temperature offset ΔT of the heating device, and the higher the output power of the 266 nm la

1.2 Near-stoichiometric Lithium Tantalate Crystal Most of the lithium tantalate crystals currently used are grown from melts with the same composition ratio, which is generally called the same composition lithium tantalate (CLT). However, large number of defects affect the physical properties of the CLT crystal, so researchers have conducted study on near-stoichiometric lithium tantalate (NSLT) with less material defects and better physical properties.

2.2 Fabrication of lithium tantalate crystal with near stoichiometric ratioThe preparation of near-stoichiometric lithium tantalate (NSLT) crystals is difficult. The current methods mainly include: the double crucible method, the flux pulling method, the float zone method and the gas phase exchange equilibrium method. 2.2.1 The double crucible methodIn the double crucible method, the melt material needs to be continuously added to the crucible during the crystal preparation process to keep the melt composition unchanged.

1. Research status and future development trend of mid-infrared (2-5 μm) laser crystalsAccording to the order of laser wavelength from short to long, the main material that have achieved laser output (including some optical fibers and transparent ceramics for comparison) are listed in Table 1. Among them, the highest continuous laser output power of laser crystals corresponding to different wave bands is shown in Figure 2. The laser output power of activated ions shows an obvious attenuation trend as the wavelength expands to the mid-infrared direction.

IntroductionLithium tantalate (LiTaO3, referred to as LT), as an excellent multifunctional crystal material, has good piezoelectric, electro-optical and pyroelectric properties, and is ideal for making surface acoustic wave (SAW) filters, resonators, tuners, Q switches and pyroelectric detectors. Devices made from LT crystal (www.wisoptic.com) are widely used in the automotive electronics, 5G communications and infrared detectors, and have broad market prospects.In 1965, Ballman used the pulling method to grow LT single crystal for the first time.