Time : Mar 16 2015Source :analogtechnologies Author : Analog Click :
With the rapid development of the photoelectric technology, laser products have widely used in medical treatment, national deense and measurement and other areas. The change of environment temperature has made a directly effect on wavelength of laser controleller. Put the main element’s temperature limited in the narrow range which can increase the precision of the system. The semiconductor laser controller consists of controlled constant surrrent source, temperature monitoring, pilot circuit and master controller. It is very strict to the circuit through the laser controller In order to output laser stability from laser controller. The supply circuit must be the stability constant flow suorce and low noise. The constant folw suorce is continuous adjustale between 0A~2.5A. In order to adjust different standards semiconductor laser controller, High power MOS is the heart of this constant flow source. Through control the grid of MOS tube, we can control the laser circuit. But It is difficult to control it, so we must connect it with nonlinear component.
Temperature detection and circuit control. Due to the temperature has great effect to quality of the laser product. The condition needs constant current. The temperature raise1°C, then the laser wavelength will raise 0.1rm. The laser will damaged or burned if the temperature gets very high, and the laser has high delicacy, and the part s of it is very expensive, so the controller must provide monitoring, limited overdrive and prevent overdrive’ability.
