variation of u2212 3 65 u03c9 u00b0 c by an amount equal and opposite i e by 3 65 u03c9 u00b0 c in one embodiment of a system 100 for stabilizing an sld device 102 shown in fig4 the set point thermistor 104 located near the sld chip 105 is electrically coupled to the temperature control electronics 106 to be used as one element in a bridge circuit 108 the output of the bridge circuit 108 provides a control signal 110 to a tec drive circuit 112 that drives the tec 114 to cool the sld chip 105 the driving circuit 112 produces a compensated tec control signal that 113 that defines the cooling characteristics of the tec 114 the set point thermistor 104 the temperature control electronics 106 and the tec 114 thus form a temperature control feedback loop in this embodiment a case sensing thermistor 116 is attached to the case 118 of the sld device 102 the case sensing thermistor 116 is electrically coupled to the bridge circuit 108 in a manner that offsets the variations with respect to case temperature of the set point thermistor 104 in one embodiment the second thermistor 116 is combined with additional support circuitry not shown so that the resulting combination will exhibit the desired resistance profile as a function of case temperature i e a resistance profile that offsets the variations with respect to case temperature of the set point thermistor 104 in other embodiments the change in set point thermistor resistance with respect to.