Simply Brighter:High Brightness Direct Diode

Industrial LasersFabtech 2012

Introduction: wavelength beam combining

Our TeraDrive™ direct diode technology has the uniquecompetitive advantage of

high brightnesshigh efficiencylow costhigh reliability

Our technology can scale to a Terawatt/cm2-str, equivalentto >10kW from a singlemode fiber

We hold 8 exclusive licenses from MIT for the keytechnologies, plus more than 8 patent applications of ourown

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ManagementParviz Tayebati, PhD, CEO, founder of CoreTek, (Nortel), Azna (Finisar),Independent Investor/ EntrepreneurBien Chann, PhD, CTO, co-founder of TeraDiode and formerly from MIT LLKevin McCallion, VP of Engineering, formerly from CoreTek and FinisarJay Liebowitz, VP of Sales and Marketing, formerly from Teem Photonicsand LasertronDamon Pender, CFO, Voice SignalRobin Huang, PhD, VP of Defense Programs, co-founder of TeraDiode andformerly from MIT LL

InvestorsStata Venture PartnersArgonaut Equity PartnersCamros Capital

Company Background

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Welding, annealing,cutting and drillingof ferrous andnonferrous• Rod• Sheet• Tubing• Bar• Semifinished parts

Fiber laser

Doped fiber gain medium

Doped rod gain medium

Nd:YAG laser

Doped disk gain medium

Disk laser

CO2 filled discharge tube

Gas laser

Diode laserpumps

TDI’s directdiode lasers

Wavelength Beam Combining Enables Material Processingusing Direct Diode Lasers

WBC direct diode lasers eliminate the brightness converter“middlemen,” producing simpler and more efficient lasers

TeraDiode Vision of Material Processing Lasers

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- Co2 (10um)

- YAG (1um)

- Fiber Laser (1um)

- Disk Laser (1um)

- Wavelength BeamCombined Direct Diode

(Any diode wavelength)

First Gen. Second Gen. Third Gen.

Smaller MoreEfficient

Lower costof ownership

Wavelength Beam Combining Technology

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Invented at MIT LL for high-brightnesspumping of high-power fiber lasers(DoD)

MIT and TDI improvements enable highefficiency, low cost, and use of“commercial, off-the-shelf” (COTS) laserdiodes

Many versions: can be optimized forspatial brightness, spectral brightness,or both

TeraDiode Intellectual Property on WBC

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Four other MIT patent applications on related technology to WBCEight patent applications from TeraDiodeTeraDiode’s IP covers all fields of use, including industrial and defense

applications

Number Title Ownership

6208679 High Power Multi-Wavelength ExternalCavity Laser

Exclusive Licensefrom MIT

6192062 Beam Combining of Diode Laser ArrayElements for High Brightness and Power

Exclusive Licensefrom MIT

6327292 External cavity laser source using spectralbeam combining in two dimensions

Exclusive Licensefrom MIT

US2009/63101 External Cavity 1-D Wavelength BeamCombining of 2 Diode Laser Elements Licensed from MIT

Wavelength-stabilized diode laser bar characteristics

L-I-V of passively cooled diode laser barPower Conversion Efficiency (PCE) at 50 A = 51%

Diode laser efficiency above 55%WBC efficiency as high as 90%

Wavelength stabilized to 970.22 nm

P

V

PCE

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High efficiency laser module

Free-space output laser module with >560 WBeam quality suitable for coupling into 100mm or 50mm fiberPCE at 85 A = 48%

P

PCE

V

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Fiber coupled versionof 500W module

Over 50x higher brightness than the state-of-the-art in direct diode lasersComparable brightness to kW-class industrial diode pumped lasers

TeraDiode’s industry leading brightness

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Company Power(W)

Fiber(mm/NA)

-Stabilized

Brightness(MW/cm2-sr)

TDI 2000 W 2,030 50/0.11 Yes 2730

TDI 1000 W 940 50/0.14 Yes 778

TDI 450 W 480 100/0.10 Yes 194

CommercialDiode Laser 1

2,000 400/0.10 No 51

CommercialDiode Laser 2

500 200/0.10 No 51

CommercialDiode Laser 3

100 100/0.12 No 28

>2,000W out of processing fiber (95%coupling out)

100µm/3.75mm-mradWPE: target >40% (Higher efficiencymeans lower cost)

WBC TeraBlade: 2kW from 100µm fiber

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High Power Industrial Lasers: Measured Beam Qualityversus Power

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0.1

1

10

100

1000

Bea

m Q

ualit

y (m

m-m

rad)

5 60.1

2 3 4 5 61

2 3 4 5 610

2

Power (kW)

Lamp pumped SSL Disk lasersCO2 lasers

Fiber lasers

TeraDiode 1kW laser used for cutting steel

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6.65mm thick (0.26 inchthick) sheet of mild steel

1.6mm thick 304stainless steel at54”/min (1.28m/min)

Edge quality comparable to industrialCO2, solid state, and fiber lasers

1kW launched from 200 micron, 18 mm-mrad delivery fiber

Specs

Power 1,040 W

Fiber 200 µm/0.18 NA

Brightness 31 MW/cm2-str

Date September 2010

TeraDiode laser welding cross sections

Keyhole welding of 304 stainless steelCross-section results courtesy of Geoff Shannon, Miyachi-Unitek

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Bead on order of0.020” wide

800W on workpieceNitrogen cover gasWeld is 2” longSpeed is 0.8 in/sec

Price/performance comparison for a typical 2 kW laser module, 50µm, 0.11NA fiber

TeraDiode meets or exceeds competition

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Fiber Disk Diode

Brightness (MW/sr/cm2) 2,682A 2,682B 2,682 51

Wall-plug efficiency(inverse relationship tocost)

>40%B 30% 18% 25%-40%

Operating cost ($/hour)C $1.00 $1.57 $2.24 $1 - $2

Notes:A. Based on processing fiber (singlemode brightness much higher)B. Assumes 90% efficiency for laser driverC. Based on 9 cents/kW-hr in US (Michigan)

Price/performance comparison for a typical 2 kW laser module, 50µm, 0.11NA fiber

TeraDiode meets or exceeds competition

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Fiber Disk Diode

Wavelength selectability Any diode None None Anydiode

Sensitivity to back-reflection None High Low None

Starting from light emitted by the diodesWBC has at least 80% efficiency (Wall Plug Efficiency = 40%)

versusFiber laser efficiency of 60% (WPE = 30%)

Higher efficiency translates into real savingsThe laser itself

Fewer diodes needed to generate the laser lightLower Bill of Material costLess power lost to heat

Multiplier effect that reduces chiller requirementsLower power consumptionSmaller footprint

Higher Efficiency from WavelengthBeam Combining Lowers Total Cost of Ownership

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500W laser engineBPP < 3.75 mm-mrad20 microsecond rise and fall times withseparately supplied TeraDiode controlelectronics

500W Fibered Engine DLE-0970-00500-050

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500W DLE486 x 71 x 246 mm3

(D x W x H)

Free space beam before fiber500W DLB

TeraBlade Product Platform

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PBC

SBCSBC

2kW, 50um 4kW, 100um

SBC SBC

PBC PBC

SBCSBC

PBC

SBCSBC

Dichroic

4kW, 50um

or

976nm 976nm 976nm 1060nm

Optical BeamCombiner

500W WBCBlade

6kW, 8kW, 10kW

Product Implementation is a combination of:Wavelength Beam Combining (Teradiode core competency)Spatial beam combiningPolarization Beam CombiningDichroic Beam Combining (coarse WDM)

TeraBlade Laser System: DLS-0970-02000-100

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• Designed for easy maintenance and lower cost

0.8 x 0.8 x 0.9 m3

(D x W x H includingcasters)

Design strengthsUsing laser diodes with over 100,000 hours of Lifetime (MTTF: 440khrs)Reliable Free Space Opto-mechanicsUsing reliable power supplies and controllers

Advantages over alternative laser technologiesNo couplers that have power density limitsNo splices that can be mishandledNo fibers to age or stress or micro-crackNo rods or disks that ageNo mirrors on which deposits can accumulate

High reliability designed in

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Service and maintenance derives fromDiode reliabilityModularity of design: 500W blades field replaceableOn board diagnostics: diode power monitoring and compensation

Fine adjustments can be made by on board controllerLarger adjustments possible by remote control via telemetry

24/7 service and maintenance to rely on local engineering & stockingApplications/Service centers to be located in key geographic locations

Detroit: spares, applications labMunich: spares, TBDShanghai: spares, application labLocations in Mexico and South America TBD

Response time recognized as critical, with different levels of service to be available

Service & Maintenance

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Conclusion

High power, high brightness laser sources are key to both theindustrial and defense laser markets

WBC direct diode lasers are the ultimate answer forBrightnessCost EffectivenessCompactnessEfficiencyReliability

TeraDiode multi-kW class high brightness direct diode lasers

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“Simply Brighter”www.teradiode.com

For white papers, go to:http://teradiode.com/technology/white-papers/

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