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Fundamental frequency noise and linewidth broadening caused by intrinsic temperature fluctuations in quantum cascade lasers
2011
Physical Review B
We theoretically investigate fundamental thermal frequency noise and linewidth broadening caused by intrinsic temperature fluctuations in both terahertz (THz) and mid-infrared (IR) quantum cascade lasers (QCLs) for the first time. The analytical derivation is based on the Green function analysis and the Van Vliet-Fassett theory. The results show that the fundamental frequency noise caused by temperature fluctuations is prominent in the low frequency range (below a few kHz) and is sensitive to
doi:10.1103/physrevb.84.125322
fatcat:4mzqpgv2i5e7zprprxrsa57mvu