described in further detail with regard to fig2 the pump laser temperature can be maintained at a near constant temperature of 25 u00b0 c u2212 1 u00b0 c 0020 fig2 is a circuit diagram illustrating the features of a system 200 consistent with the present invention for electronically controlling the temperature of a pump laser in system 200 thermistor 105 has an electrical resistance 202 that varies as a function of temperature in a predictable manner detector 108 may include a non inverting amplifier 204 non inverting amplifier 204 may include a fixed voltage reference input 206 an amplifier input 208 and an amplifier output 210 laser diode driver 110 may include a step down regulator 220 and an amplifier 236 step down regulator 220 may include a regulator output 224 a driver input 226 and an enable input 228 amplifier 236 may include a fixed voltage reference input 238 a laser diode current setpoint input 240 a laser diode driver output 242 and a laser diode driver input 244 depending on the characteristics of laser diode 104 a laser diode current setpoint applied to input 240 is determined by the user to drive laser diode 104 at a level acceptable for the.