next-generation optical fiber fabrication
DESCRIPTION
You will hear about an optical fiber draw tower in operation at LLNL that is researching new designs and applications for optical fibers. Optical fibers were originally developed for the telecom industry but new designs and fabrication techniques that can be researched using the LLNL draw tower are enabling uses in areas such as surgery, industrial machining, high power lasers and optical sensorsTRANSCRIPT
- 1. LLNL-PRES-773886This work was performed under the auspices of theU.S. Department of Energy by Lawrence LivermoreNational Laboratory under contract DE-AC52-07NA27344.Lawrence Livermore National Security, LLCDr. Jay W. Dawson, Fiber Technologies Group Leader
2. Lawrence Livermore National Laboratory LLNL-PRES-7738862 Fibers Diffraction limited beams Robust, flexible transport Operate in extreme environmentsand insensitive to electro-magneticinterference Fiber Lasers Low maintenance & high reliability Efficient (>30% wall-plug) High average powers (kW) 3. Lawrence Livermore National Laboratory LLNL-PRES-7738863Telecom Flexible Delivery forIndustrial MachiningHigh Power Laser SourcesDistributed SensorsShort-pulse surgerylaser deliverySensors for Oil and GasHigh Voltage Current SensorsThese are examples of a wide array of potential applications inflexible light transport, sensors and components for laser systems. 4. Lawrence Livermore National Laboratory LLNL-PRES-7738864Cross section: 125 m O.D. Very low losses attainableStrong and Flexible 50% transmission over 30km 5. Lawrence Livermore National Laboratory LLNL-PRES-7738865DiffractionPhotonic crystal fiberRefractionConventional fiber 6. 5 W at 44% optical efficiencyLawrence Livermore National Laboratory LLNL-PRES-7738866P = 0.065 W P = 1.1 W P = 2.4 W Optical Near FieldOptical Far Field250 m200 m10 m X 120 mYb3+ SlabWaveguideSecondaryWaveguide forDiode Pump Light65432100 5 10 15 20Output Power, WCoupled Pump Power, WExample: investigation ofrectangular core fiber lasersfor improved power scaling 7. Lawrence Livermore National Laboratory LLNL-PRES-7738867Proposed Design Calculated Waveguide Modes 8. Lawrence Livermore National Laboratory LLNL-PRES-7738868Computer Model Manufacturing Design 9. Lawrence Livermore National Laboratory LLNL-PRES-7738869Raw MaterialDraw to ~1mmrods and tubesStack to Fiber DesignFinal Preform inFurnaceFiber ProductionDrawTower 10. Lawrence Livermore National Laboratory LLNL-PRES-77388610 11. PassiveRibbon FiberYb3+ Ribbon FiberUV Rad HardQualification FiberLawrence Livermore National Laboratory LLNL-PRES-77388611215 m200 m250 m250 mHollow Core Cane(preform)Negative CurvatureCorefor mid-IR 12. Hollow core waveguides for high power transport Short wavelength fiber lasers (