Laser equipment using green lasers more stable but cost is too high, green laser equipment Relative to other ordinary laser equipment, green light and continuous pulse laser performance has been able to meet the requirements of most laser welding applications. However, in mechanical equipment, especially for laser equipment, the device will have some of the use of electronic components will lead to the stability of the use of equipment, then if the use of equipment to solve the stability of the problem is very important.

We have a lot of tests found that the general cause of the stability of green laser equipment, the main problems are such as several aspects, such as the resonant cavity mechanical structure is unstable, working temperature changes, thermal lens effect, pump source power fluctuations, laser Crystal absorption of green light, mode jump and other factors. So to improve the stability of the equipment, we will start from these aspects, these factors to minimize the impact, so as to ensure the stability of the use of the entire device. Here we are lettering laser introduced some methods we can be familiar with, you can directly control the LD drive current of the photoelectric feedback method to improve the stability of the output power of the green laser: According to the detected output of the green laser power change signal, the pumping LD The working current feedback control, so as to control the LD output power, and then to achieve the green laser output power control, improve its stability. Or a laser beam outputted from a continuous or pulsed green laser is filtered through a filter to filter out 808 nm pumping light of an LD which is not absorbed by the laser crystal and 1064 nm through the output mirror. After passing through the light for sampling In the case of a spectroscope, a small portion of the 532 nm laser is reflected to the photodetector to detect its light intensity change. The feedback signal output signal is sent to the laser driver, the LD drive current control, thereby changing the LD pumping power, the laser crystal The gain of the green laser compensates for the fluctuation of the green laser power, so that the output power of the green laser is stabilized.

The stability of the laser equipment, especially for some high-precision equipment, is critical, and the consistency, stability and longevity of the equipment are some of the concerns of the customer, so we Zhengxin laser in the green laser equipment above a lot of process tests to explore the stability of the equipment to ensure that the hope that the majority of customers can also benefit from the choice of laser welding machine manufacturers must choose a formal professional laser company!