Thermoelectric Coolers for Pump Lasers
Within the telecommunications market, a common use for thermoelectric coolers (TECs) is the temperature stabilization of semiconductor laser diodes. A common type of laser diode found in telecom is the 980nm pump laser. These pump lasers act as the source of light energy to excite the atoms inside Erbium Doped Fiber Amplifiers (EDFA). EDFAs are spaced periodically along a span of fiber optic cable to amplify a weak incoming stream of light pulses into a much stronger departing stream. Pump lasers overheat when not in use, decreasing their total lifetime. II-VI Marlows’ thermoelectric coolers remove the heat from the laser, thereby reducing the laser’s temperature and significantly increasing its lifetime. Since the pump laser is expected to work nonstop in the field for a minimum of 20 years, the TEC must match the laser’s lifetime and durability both in design and build.