Thermo-electric temperature control arrangement for laser...

G - Physics – 05 – D

Patent

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G05D 23/20 (2006.01) G05D 23/19 (2006.01)

Patent

CA 2050047

A thermo-electric laser temperature control apparatus is driven by a switching mode control circuit. Driving current polarity determines if the thermo- electric apparatus is operating in a heat absorbent or heat generating mode. A sequencing control circuit is used in association with the control circuit to define operative ranges of the thermo-electric temperature control apparatus consistent with maintaining proper temperature for a linear operative range for the laser. Feedback circuitry permits precision control of the converter output to limit the operative temperature range of the laser to a small precisely defined temperature window.

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