Thermistor is a kind of sensitive element. There are two kinds of thermistors based on different the temperature, which are PTC and NTC. It has a typical characteristic that it is sensitive on temperature. It shows different resistance value when it is under different temperature.(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)

Thermistor is a kind of sensitive element, and according to the different temperature coefficients, thermistor can be divided into positive temperature coefficient thermistor (PTC thermistor) and negative temperature coefficient thermistor (NTC thermistor). The typical characteristic of the thermistor is sensitive to temperature, and different temperatures show different resistance values. At the higher temperature, the resistance value of PTC thermistor is larger, and NTC thermistor is lower, which belongs to the same semiconductor device.(more)

In the installation process, it's 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:(more)

The NTC thermistor is a thermistor with negative temperature coefficient and it has high performance ceramics near theoretical density structure by using a single high purity material. Therefore, at the same time with realizing miniaturization, it also has the small fluctuation characteristics of resistance value and temperature and fast response characteristic, which can take the high sensitivity and high accuracy detection.(more)

There are a lot of people worried about heating element working in the airtight space, and the working heating element produces heat continuously, making temperature of the airtight space increase, and shortening the lifetime of the element itself even damaged completely. Today I will introduce a cooling device (ATECA105) to help you solve this problem.(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.(more)

Semiconductor laser is also known as laser diode (LD). As early as in 1953, in an unpublished manuscript, John Von Neumann was the first to discuss the possibility of stimulated emission produced in the semiconductor. He considered that stimulated emission can be achieved through the injection of minority carriers to the PN junction, and the transition rates between two Brillouin zones were calculated. After summing up this theory, Bardeen believed that through a variety of methods disturbing conduction band electrons and equilibrium concentration, it can cause the non-equilibrium minority carrier recombination and produce a photon, which the radiative recombination rate can be the same with amplifiers and it can be improved by the electromagnetic radiation at the same frequency. It should be said to be the earliest concept of laser.(more)

There are huge differences between laser and ordinary light, and laser owns the following features: 1.The laser launched is monochromatic, and it has a specific wavelength light which would be a specific color. What’s more, its wavelength depends on the power released by e. when it returns back to low power orbit.(more)

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.(more)