Thermoelectric modules deliver precise laser diode cooling

Laird has developed a TEM that includes a laser diode butterfly package. Primarily used to stabilise the temperature of sensitive optical components in telecom and photonics industries, the miniature OptoTEC Series is intended for applications that have lower cooling requirements of 10W or less. The series combines a small geometric footprint of less than 13mm x 13mm with efficient and reliable heat pumping capacity. A laser diode is used to create a light wavelength that travels extended distances for communications. Signal loss can occur at this distance and a pump laser is used to strengthen the signal as it passes thru an optical device. Laser diodes are also bundled together to form a high-power laser than can cut through materials. While the temperature of the package may reach 85C, to maintain peak performance the series is used to keep the laser diode operating temperature stable at around 25C+/-0.5C. TEMs offer precise temperature control accuracy achieving ±0.01C. The module dissipates heat generated by the active optical component, which is around 1W to 2W.