Thermoelectric coolers ( TECs ) are built based on Peltier effect, which can both heat and cool depending on the direction of input DC current. Because of having no noise, no vibration, no refrigerant, light weight, compact size and some other advantages, TEC has been widely used for cooling certain components in electronic devices and radio communication equipment. There are some operating instructions that you should know before using TEC. Correct installation and usage 1.One side of TEC is mo...(more)
Thermoelectric cooler ( TEC ) is based on Peltier effect, which can both cool and heat. According to changing the polarity of direct current, the same TEC can realize cooling or heating. This effect is achieved by the principle of thermoelectric. In principle, TEC just plays a role of a heat transfer tool. Physical picture of TEC There are advantages as follows: 1.There is no need of any refrigerant and it can work continuously. 2.TEC has two functions, cooling and heating. In general, the cooli...(more)
In the installation process, its necessary to avoid wrong installation, which makes influence to the TEC modules . There are the following points that may affect the reliability of the TEC modules during the installation: a) TECs have high mechanical strength under pressure, but they have a small shear strength. Accordingly, TECs cannot be placed in a mechanical system that plays a main supporting role. Moreover, in the applications that may involves shocking and impact, its better to install th...(more)
In the system of optical communication, laser driver is an important part of an optical transmitter and it provides enough current to drive laser diode with direct modulation or enough voltage to drive electoral absorption device with indirect modulation. In order to meet different demands of design, our company has developed a variety of series of laser drivers and laser controllers : ultra-low noise laser controllers, high efficient laser controllers, high efficient laser drivers, dual channel...(more)
c) In order to avoid TECs losing effect due to obvious mechanical vibration, do not place any large mass device without support on the cold end of TECs. When involving lass mass device, its better to use chucking to fix the TECs between heat sinks and the object. Or place the device on a cold plate that can be media at first. At this time, damping screws can effectively increase the shear strength of the whole mechanical system. d) The TECs shall insulate from moisture in the air in order to avo...(more)
With the development of science and technology, laser technology has been used in many fields, such as national economy, national defense construction and so on. And it has wide applications in long-distance communications, digital signal storage and recovery, laser ranging, robotics, holographic application, medical diagnosis, etc. Picture ofthe laser driver However, laser has strict requirements for working conditions, that is, under the conditions of inappropriate work or storage, the perform...(more)
Laser is a kind of light source components. In actually, drive circuit refers to modulation circuit of light source device, which plays a role of converting digital signal to optical pulse signal and then sending to fibers. This part is the core of optical transmitter, which decides many important technical parameters. As shown in figure 1, the main function of laser drive circuit is to provide appropriate bias and modulation current for laser diodes, which can make laser work normally. Thereint...(more)
Based on the Piltier effect, thermoelectric cooling is an energy conversion process, using electric energy as power, that is: when the direct current is through two different conductive materials, nodes will have endothermic phenomenon (when the current is in the opposite direction, exothermic phenomenon will be generated). As the Peltier effect of semiconductor materials is very obvious, the thermoelectric modules are mostly made up of semiconductor materials at home and aboard. In the practica...(more)
