Opt Lasers created several kinds of TEC controllers - temperature control devices. Choice of the right cooling is important due to many reasons. One of them is heat dissipation. For example, when the working temperature of the system is always higher than expected, there is no need to use a cooling/heating TEC controller. The module with a cooling option only will be absolutely enough. However, some systems may require both cooling and heating to ensure the optimal operating temperature. In a situation when the temperature of the environment is changing quickly or is lower than desired a temperature controller with a full bridge may be needed. There is no best temperature controller since each of them can be used depending on the system requirement and environmental conditions.
Additional functionalities like UART communication, size, PID algorithm or maximum current should also be taken into consideration especially when the system is expected to have an upgrade in the near future. Remember that using a proper TEC controller assures better efficiency of a laser diode and also extends its lifetime.