Temperature compensated coupled cavity diode lasers

摘要

It has been shown theoretically that the temperature coefficient of the oscillation wavelength in semiconductor lasers can be reduced to zero by coupling an external cavity whose optical length decreases with temperature. Here are described two types of temperature compensated coupled cavity (TC3) diode lasers and their properties calculated in the steady state. In such devices an interference effect due to multi-cavities is expected to cause unstable mode hopping behaviour, but it was found to be settled by choosing an adequate external cavity length.