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.(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.(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.(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, it's 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.(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.(more)

I am a designer. I have never used such a wonderful product. It is called RESISTOR KITS. It has 128 kinds of values from 0 ohm to 10M ohm in a box. The kits are very useful. It is easy to find any value of resister in E24 and I can place them on the work bench or the shelf. When I am doing an experiment, I only need to open the box and choose the label printed in the cover. Please look at the pictures below. Another reason I like it is the precision. It is 1%, much better than 5%.(more)

LED is the abbreviation of light emitting diode, which is a solid light emitting device of semiconductor. Using light emitting materials of solid semiconductor chips, carriers in semiconductor will composite, cause photon emission and produce light, when the two ends of LED are with forward voltage. LED can directly emit red, yellow, blue, green, green, orange, purple and white light.(more)

One of the attractive features of thermoelectric technology is that it offers an incredible degree of control ability. With a properly(more)

SNR (SIGNAL-NOISE RATIO) refers to the ratio of signal and noise which is in an electronic device or electronic system. The electronic signals come from external device and need to be processed through the equipment, and the noise is additional signal without rules and does not exist in the original signal, and this noise does not vary with original signal.(more)

At present, there are many kinds of heat sinks, including natural convection, forced convection and liquid cooling. The natural convection radiator can be used in the small power condition, especially when the working current of small thermoelectric coolers is less than 2A. But for most application conditions, natural convection radiator cannot meet the requirement that all heat need to be exhausted, then we need to use forced convection radiators or liquid cooling radiators.(more)