flow fiber ppt 2007
DESCRIPTION
Propriatary technology for manufacture of solid or hollow optical fiber from a soft glass melt in arbitrary lengths appropriate for telcom or laser fabrication applications. Contact Flow Pharma, Inc. 650 462 1440TRANSCRIPT
![Page 1: Flow Fiber Ppt 2007](https://reader033.vdocuments.net/reader033/viewer/2022061209/548cc6dab4795996278b4898/html5/thumbnails/1.jpg)
March, 2010
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Management Team
• Reid Rubsamen, President and CEO– A.B. Computer Science, Berkeley – M.S. Computer Science, Stanford – M.D. Stanford– Laboratory for Computer Science, MIT
• Doctoral candidate 1989 - 1991– Founded Aradigm (IPO 1996)– Founded Flow Pharma 2002– Named inventor on 65 issued U.S. Patents
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Flow Focusing Technology
• Liquid guided by “lens” of gas
producing precision micro-jet
• Jet does not touch sides of the hole
• Immaculate Extrusion
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Flow Focusing Technology
• Invisible “lens” of gas can be qualitatively
demonstrated experimentally
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Flow Focusing Technology
• Concentric needle configuration
• Allows production of clad fiber or encapsulated microspheres– Cure early for fiber– Cure late for spheres
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Flow Focusing Technology• Steady state jet
characteristics described by a formula
• Dependencies are on liquid density, gas pressure drop and liquid flow rate
• Patented Physics
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Molten Material ExtrusionFiber Production
• Traditional optical fiber fabrication process
• Pre-form is mounted in a tower and heated
• Fiber is drawn down
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Molten Material ExtrusionFiber Production
• No pre-form required• Core and cladding can
be co-extruded• No heat or strain introduced by
viscous fiber draw-down• Wide range of possible materials
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Fiber Optic Light Transmission• Traditional approach is via total internal reflectance
(TIR)• Process is lossy and not phase preserving• Photonic bandgap (PBG) transmission allows
potentially lossless, phase preserving light transmission
• PBG fiber can be used to transmit very high energy laser light
• Short lengths of PBG fiber have been produced but no process exists for kilometer length production
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• PBG fiber is very high performance with ultra low loss
• PBG fiber has specialty fiber roles e.g. can serve as a notch filter
• Blaze founder Russell described simple structures for PBG transmission
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Potential Benefits of PBG Fiber
• Long Haul Fiber– << 0.1db loss/kilometer– Phase preserving– Broad band
• Specialty Fiber– Transmission of high power laser light– Passive notch filter
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Potential Demand
Time
In-place internet optical backbone capacity
Internet optical backbone capacity requirement
Emergence of video-on-demand
Bandwidth
Ban
dwid
th
Time
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Fiber Optic Applications
FF may be the only viable
process for mass production of low loss PBG fiber
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Parallel Co-Extrusion
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Simple PBG Structures Viable
rp/rc = 0.8
TE Transmittance
0.00
0.20
0.40
0.60
0.80
1.00
0.00 0.50 1.00 1.50 2.00 2.50
Normalized Frequency
Tran
smitt
ance
TE Transmittance
0.00
0.20
0.40
0.60
0.80
1.00
0.00 0.50 1.00 1.50 2.00 2.50
Normalized Frequency
Tra
nsm
ittan
ce
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Flow Focusing Draw Tower
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Flow Focusing Draw Tower
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Flow Focusing Optical Team
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Draw Tower Parameters
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RF Heated Crucible
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Tower and RF Generator
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Crucible and FF Nozzle
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FF Nozzle in Open Position
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FF Nozzle Under Crucible
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FF Nozzle In Open Position
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FF Nozzle Assembly
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FF Nozzle Alignment
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Molten Glass In Crucible
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Molten Glass Entering Open Nozzle
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Hollow Core Fiber Cross SectionRandomly selected hollow fiber cross section. There are still instabilities evidentin this early draw. The ten micron diameter corehas good circularity and concentricity, but the fiber body is 10% elliptical. Several hundred metersof comparable fiber wereproduced in this experiment.
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Goal
Make kilometer lengths of precision, multicore PBG fiber and test performance
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Path To The GoalTask Month
21
4 6 8 10
6 7 8 9 10 11 12ApparatusImprovementsSeals and pressure
controlVibrationisolationRFinduction powersupplyMelt TemperaturepyrometerCladdingsystemInjectors
GlassSelectionTheroeticalModelingFluid modeling for injector
designFlow nozzleoptimizationPBG fiberstructure
FiberCharacterizatrionReal time dimensional
controlOpticaltransmissionMechanical andenvironmental
FeedbackControl
Program Management
MajorMilestonesImproved draw tower
completeGlass selected andformulatedFirst feedback controlled drawscompleteFirst 7 hole fiber drawn &characterizedFinal reportcomplete
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Flow Focusing Patent Position