VERY HIGH POWER PULSED FIBER LASER
First Claim
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1. A fiber laser amplifier comprising:
- a seed laser configured to produce a seed pulse at a pulse repetition rate of about 10 Hz to about 10 KHz;
a fiber preamplifier configured to receive and amplify the seed pulse, the fiber preamplifier having a first core diameter;
a fiber power amplifier comprising a low numerical aperture, coiled clad fiber, having a core diameter larger than the first core diameter; and
a coupler configured to couple the fiber preamplifier to the fiber power amplifier.
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Abstract
A pulsed fiber laser including fiber preamplifier and power amplifier stages is disclosed. A fiber preamplifier includes first and second preamplifier stages that receive and amplify a seed pulse. A filter isolator placed between the preamplifier stages suppresses noise from the first preamplifier stage. An acoustic optical modulator located in the second preamplifier stage eliminates unwanted wavelengths from the amplified seed pulse received from the first preamplifier stage. The pulsed fiber laser is rugged and lightweight.
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Citations
20 Claims
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1. A fiber laser amplifier comprising:
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a seed laser configured to produce a seed pulse at a pulse repetition rate of about 10 Hz to about 10 KHz; a fiber preamplifier configured to receive and amplify the seed pulse, the fiber preamplifier having a first core diameter; a fiber power amplifier comprising a low numerical aperture, coiled clad fiber, having a core diameter larger than the first core diameter; and a coupler configured to couple the fiber preamplifier to the fiber power amplifier. - View Dependent Claims (2, 3, 4, 5)
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6. A pulsed fiber laser comprising:
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a seed laser configured to produce a seed pulse at a pulse repetition rate of about 10 Hz to about 10 KHz; a first amplifier configured to receive and amplify the seed pulse, the first amplifier having a first core diameter; a second amplifier comprising coiled clad fiber having a second core diameter, the second core diameter being larger than the first core diameter; and a coupler configured to couple the first and second amplifiers; wherein core diameters of the second amplifier and subsequent amplifiers increase with each subsequent amplifier stage. - View Dependent Claims (7, 8, 9)
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10. A fiber preamplifier, comprising:
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a first fiber preamplifier stage configured to receive and amplify a seed pulse produced by a seed laser at a pulse repetition rate of about 10 Hz to about 10 KHz, the first fiber preamplifier stage comprising a first core diameter; a second fiber preamplifier stage configured to receive the amplified seed pulse, the second fiber preamplifier stage comprising a second core diameter and an acoustic optical modulator (AOM); and a filter isolator located between the first fiber preamplifier stage and the second fiber preamplifier stage, the filter isolator configured to suppress noise from the first fiber preamplifier stage; wherein the second core diameter is larger than the first core diameter. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification