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Pulse pumping an optically pumped laser

  • US 4,489,415 A
  • Filed: 07/12/1982
  • Issued: 12/18/1984
  • Est. Priority Date: 07/12/1982
  • Status: Expired due to Fees
First Claim
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1. In an optically pumped laser having a gaseous discharge flashlamp for pumping the laser and a pulsing circuit that generates flashlamp current pulses, the improvement wherein said pulsing circuit comprises:

  • a high current switching transistor in series with said flashlamp and connected to a source of dc voltage;

    a control circuit for generating base drive pulses which render said switching transistor conductive to pulse said flashlamp;

    wherein said switching transistor is a Darlington pair and said control circuit injects currents into the base of both transistors; and

    means in parallel with said switching transistor to provide a path for flashlamp simmer current during nonconducting intervals of said switching transistor.

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