Thermoelectric Heating & Cooling for CATV Lasers
A common use for laser diodes is the transmission of analog information over fiber optic cables carrying Cable Television (CATV) signals. In CATV systems, different wavelengths can occupy the same fiber optic cable and must not be allowed to drift on top of each other due to changes in temperature. Thermoelectric coolers can either heat or cool the CATV lasers and hence stabilize their temperature to a given point and prevent wavelength drift. Since CATV lasers are expected to work nonstop in the field for a minimum of 20 years, the TEC must accommodate the laser’s lifetime and durability both in design and build.