... high energy level, and soon transit to a higher level by the form of a non-radiative, and form the ... linearity, optical isolation, the DFB, thermoelectric cooling DFB laser produced by JDSU, Fujitsu, Nortel, Lucent, Fitel and other world-renowned ... Once the laser operating parameters deviate from the permissible range set by the software, micro-processing will automatically turn off laser power ...