The incentive method of laser drivers is mostly injection current form. When the injection current is greater than the threshold current, radiation power will rapidly rise with the increase of the current. Therefore, by changing the injection current, the output optical power can be adjusted. In order to control semiconductor laser, the methods of automatic control are usually adopted, which includes constant current/power/voltage control. In the constant power control mode, by using photoelectr...(more)
As shown in the fig1pictures below, there are little few appearance differences between TEC and TEG, but their principles and applications are not the same. Fig 1. The photo of TEC and TEG Based on semiconductor materials, a thermoelectric cooler (TEC) can be used as an electronic component of a small heat pump. Through by adding a little low DC voltage to both ends of TEC, heat quantity will flow from one end to the other, and at the same time, the temperature of one end will decrease and the o...(more)
Epoxy resin refers to organic compounds with two or more epoxy groups, and with rare exceptions, their relative molecular mass is not high. Epoxy resin has many advantages such as good dielectric properties, mechanical properties, adhesion, corrosion resistance, etc. And its dimensional stability and manufacturability are also both good, as well as its comprehensive properties. Whats more, due to the flexibility and diversity of epoxy materials, epoxy resin almost meets all the requirements of v...(more)
If you are looking for resistor kits, there is no need to worry as its wide range is available in a number of stores. But these days, people do not have enough time to seek such types of products in the market. They want short cuts to save...(more)
Originally recognized as a condenser, a capacitor is an electrical component, which preserves energy in an electric field. The capacitor only stores the electrons, but cant produce them. It is comprised 2 electrical conductors separated by...(more)
When it comes to laser diode drivers, there are certain things that need to be kept in mind. For the driving of laser diodes, special types of driver circuits are employed. They can work in 2 ways. Firstly by producing constant regulated vo...(more)
TEG is the abbreviation of thermoelectric generator, which can convert heat directly into electricity, totally opposite to TEC . TEG can be used as anti-corrosion protection for oil pipeline and gas pipeline and it can also be used as a power supply for monitoring facilities. The principle of TEG The operating principle of TEG is based on Seebeck effect found by Tomac Norahh, a German physicist. In an open circuit of two different conductors, if there is temperature difference between two contac...(more)
In 1821, Thomas Seebeck discovered when two conductors with different materials and different temperature are connected, there is current flowing in the loop However, twelve years later, J. C. Peltier discovered an opposite phenomenon, that is ,by deleting a conductor in the loop, the external current can flow through the loop, and then a temperature difference between two connecting points is appeared. This phenomenon came to be known as Peltier Effect. Owing to the limitation of material at th...(more)
