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Electronic driver circuit for directly modulated semiconductor lasers

  • US 6,587,489 B2
  • Filed: 02/21/2001
  • Issued: 07/01/2003
  • Est. Priority Date: 12/29/2000
  • Status: Expired due to Term
First Claim
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1. An electronic driver circuit for directly modulated semiconductor lasers, comprising:

  • a first circuit for generating a constant current;

    a second circuit for modulating the constant current and connected to said first circuit, said second circuit, in dependence on a digital data signal, superimposing a modulation current on the constant current resulting in a laser current to be fed to a semiconductor laser; and

    a third circuit for keeping components of said first circuit and said second circuit at a low impedance during a rising edge and a falling edge of the laser current fed to the semiconductor laser, said third circuit connected to said first circuit and said second circuit.

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