FIBER LASER SYSTEM, REFLECTION RESISTANCE EVALUATION METHOD AND REFLECTION RESISTANCE IMPROVEMENT METHOD FOR SAME, AND FIBER LASER
First Claim
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1. A fiber laser system, comprising:
- a plurality of fiber lasers,each of the plurality of fiber lasers including a laser beam measuring section, a Stokes beam measuring section, a low reflection mirror, and a high reflection mirror,the laser beam measuring section being configured to measure a power of a laser beam which the low reflection mirror has transmitted therethrough,the Stokes beam measuring section being configured to measure a power of a Stokes beam which the high reflection mirror has transmitted therethrough, anda calculation section configured to calculate, for each of the plurality of fiber lasers, a ratio of (i) the power of the Stokes beam which the high reflection mirror has transmitted therethrough to (ii) the power of the laser beam which the low reflection mirror has transmitted therethrough, based on a result of measurement made by the laser beam measuring section and a result of measurement made by the Stokes beam measuring section.
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Abstract
Reflection resistances of respective fiber lasers in a state where an entire fiber laser system is in operation are evaluated. Each of fiber lasers (2 through 4) includes (i) a laser beam measuring section (28) configured to measure a power of a laser beam which a low reflection FBG (26) has transmitted therethrough and (ii) a Stokes beam measuring section (29) configured to measure a power of a Stokes beam which a high reflection FBG (24) has transmitted therethrough.
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Citations
11 Claims
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1. A fiber laser system, comprising:
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a plurality of fiber lasers, each of the plurality of fiber lasers including a laser beam measuring section, a Stokes beam measuring section, a low reflection mirror, and a high reflection mirror, the laser beam measuring section being configured to measure a power of a laser beam which the low reflection mirror has transmitted therethrough, the Stokes beam measuring section being configured to measure a power of a Stokes beam which the high reflection mirror has transmitted therethrough, and a calculation section configured to calculate, for each of the plurality of fiber lasers, a ratio of (i) the power of the Stokes beam which the high reflection mirror has transmitted therethrough to (ii) the power of the laser beam which the low reflection mirror has transmitted therethrough, based on a result of measurement made by the laser beam measuring section and a result of measurement made by the Stokes beam measuring section. - View Dependent Claims (2, 4, 5, 6)
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3. (canceled)
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7. A method of evaluating a reflection resistance of each of a plurality of fiber lasers in a fiber laser system, the method comprising the steps of:
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(a) measuring a first power of a laser beam which the low reflection mirror of each of the plurality of fiber lasers has transmitted therethrough; (b) measuring a second power of a Stokes beam which the high reflection mirror of the each of the plurality of fiber lasers has transmitted therethrough; and (c) calculating, for each of the plurality of fiber lasers, a ratio of the second power to the first power, based on a result of measurement made in the step (a) and a result of measurement made in the step (b). - View Dependent Claims (8)
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9. A fiber laser, comprising:
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an amplifying optical fiber; a low reflection mirror provided at one end of the amplifying optical fiber; a high reflection mirror provided at the other end of the amplifying optical fiber; a laser beam measuring section configured to measure a power of a laser beam which the low reflection mirror has transmitted therethrough; a Stokes beam measuring section configured to measure a power of a Stokes beam which the high reflection mirror has transmitted therethrough; and a calculation section configured to calculate a ratio of (i) the power of the Stokes beam which the high reflection mirror has transmitted therethrough to (ii) the power of the laser beam which the low reflection mirror has transmitted therethrough, based on a result of measurement made by the laser beam measuring section and a result of measurement made by the Stokes beam measuring section.
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10. (canceled)
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11. A method of evaluating a reflection resistance of a fiber laser, comprising the steps of:
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(a) measuring a first power of a laser beam which a low reflection mirror of the fiber laser has transmitted therethrough; (b) measuring a second power of a Stokes beam which a high reflection mirror of the fiber laser has transmitted therethrough; and (c) calculating a ratio of the second power to the first power, based on a result of measurement made in the step (a) and a result of measurement made in the step (b).
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Specification