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Multi-wavelength light amplifier

  • US 6,055,092 A
  • Filed: 05/28/1996
  • Issued: 04/25/2000
  • Est. Priority Date: 03/09/1995
  • Status: Expired due to Term
First Claim
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1. An apparatus comprising:

  • a multi-stage optical amplifying unit, for amplifying an input light, which includesa first-stage optical amplifier which has an optical fiber for amplifying the input light to produce a first-stage amplified light;

    a second-stage optical amplifier which has an optical fiber for amplifying the first-stage amplified light, to produce a second-stage amplified light; and

    an attenuator positioned between the first-stage optical amplifier and the second-stage optical amplifier, to attenuate the power level of the first-stage amplified light and thereby control a power level of the second-stage amplified light.

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