The Irradiation Effect Of Quartz Crystal Resonators By Picosecond Laser

Quartz crystal resonators are important frequency control elements in electronic products with a complicated manufacturing process. During operations of a resonator, the coupling between the main functioning mode and the spurious modes should be avoided, since it will greatly increase the resistance and reduce the quality factor value, making it unable to work steadily and efficiently. In order to limit the spurious modes and reduce the mode couplings, an experimental study was conducted on the processing of quartz crystals by picosecond lasers. And we have investigated the effects of parameters of picosecond laser irradiation on properties of quartz crystal blanks. We irradiated both ends of quartz crystal blanks with a picosecond laser beam, and the laser power was controlled to limit the total input. Then we manufactured quartz crystal resonators with the laser processed blanks and measured their properties. After the quartz crystal blanks are irradiated with different power levels, the performance of the quartz crystal resonator does have some changes. Our goal is to explore the effects of laser irradiation on quartz crystals and optimize quartz crystal resonators with the selection of irradiation areas and power levels. With the noticeable effects from the first batch of test samples, we are studying novel irradiation schemes for more samples and measurements.