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Pulsed laser for lidar system

  • US 10,520,602 B2
  • Filed: 11/29/2016
  • Issued: 12/31/2019
  • Est. Priority Date: 11/30/2015
  • Status: Active Grant
First Claim
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1. A laser system comprising:

  • a seed laser configured to produce optical seed pulses;

    a first fiber-optic amplifier configured to amplify the seed pulses by a first amplifier gain to produce a first-amplifier output that comprises amplified seed pulses and amplified spontaneous emission (ASE);

    a first optical filter configured to remove from the first-amplifier output an amount of the ASE;

    a second fiber-optic amplifier configured to receive the amplified seed pulses from the first optical filter and amplify the received pulses by a second amplifier gain to produce output pulses, wherein the output pulses have output-pulse characteristics comprising;

    a pulse repetition frequency of less than or equal to 100 MHz;

    a pulse duration of less than or equal to 20 nanoseconds; and

    a duty cycle of less than or equal to 1%; and

    an optical demultiplexer configured to receive the output pulses from the second fiber-optic amplifier and distribute the output pulses to a plurality of optical links of a lidar system, wherein the optical links are coupled to a respective plurality of sensor heads of the lidar system.

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