Based on the bi-directional properties of semiconductor cooler,we designed a bi-directional active high-accurated temperature controller,with broad working range.

In order to control the temperature of the laser diode,a semiconductor cooler ——PELTIER is applied and the technique of fuzzy and PI control method are adopted either.

A linear dynamic model of the thermoelectric cooler was derived by using small-signal linearization method.

Thermoelectric cooler has dynamic thermoelectric performance under complex environment, an unstable heat exchange condition or a requested fast adjust time condition.

During the investigation, by considering three primary factors of LD thermal control (TEC, temperature control circuit, radiator), a design method of LD thermal control technology is proposed as the result of software simulation and theoretical calculation.

By using single chip processor, semiconductor refrigerator can control the temperature of the laser diode.

The paper discusses the feasiblity of Semiconductor refrigerator used to dissipate heat for functional tuke of poweramplifying system,and emphasises on the principle of dissipating heat by refrigeration.

A process that optimizes designing of fin sink at cool sides and hot sides of a thermoelectric refrigerator is introduced.

Application of surface technology in semiconductor refrigerating units;