KTP EO Cell Q-switch-manufacture,factory,supplier from China

3 The main application of lithium tantalate crystal3.3 E-O Q-SwitchThe basis of laser Q-switched technology is a special optical component - a fast intracavity optical switch generally called Q-switch. The Q value is an indicator for evaluating the quality of the optical resonant cavity. The higher the Q value, the lower the required pump threshold and the easier it is for the laser to oscillate. The purpose of laser Q-switching technology is to compress the pulse width and increase the peak power.

As the source manufacturer of many kinds of function crystals and the leading producer of DKDP Pockels cell in China, WISOPTIC provides high cost-effective products to its customers worldwide and gains substantial trust from all of its business partners. Every year over 40% of WISOPTIC's products are exported to Europe, UK, North America, Korea, Israel, etc.Normally WISOPTIC takes parts in at least one of the important exhibitions in the industry of photonics and laser, such as Laser World of Photonics (Munich/Shanghai), SPIE Photonics West (San Francisco), KIMES (Seoul), PHOTONIX (To

It’s well known that the DKDP crystal is very easy to be damaged by humidity, especially in  environment with high temperature. So ordinary DKDP Pockels cells can not be used in high temperature and high humidity environment, or their service life is very short. After more than two years of continuous technical research, WISOPTIC has successfully developed DKDP Pockels cells that can be used in lasers working in high temperature and high humidity environments.

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).

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.

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.

1.3 Doping of Lithium Tantalate CrystalDifferent fields have different requirements for the properties of lithium tantalate crystals. When being used to prepare high-density and large-capacity holographic information storage devices, LiTaO3 crystals need to have excellent photorefractive properties. Due to the particularity of the crystal structure of LiTaO3, its physical properties can be adjusted through doping, for example, the widely used photorefractive doping.

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.

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.

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.