Diode laser controller circuit
Staff -- Test & Measurement World, 10/1/2004
Newport has developed a diode laser current driver circuit with noise characteristics that it says are as much as 10 times lower than currently available. The company also claims that the circuit offers greater stability, expanded dynamic range, improved electrical efficiency, and the ability to work with lasers over a wider resistance range. The design is based on a switching power supply that drives an output current regulator with the addition of a voltage regulator to power the current regulator, circuitry to equalize the voltage drop across these circuit elements, and the placement of each on separate heatsinks. Newport, Irvine, CA. www.newport.com.
