High Power Industrial CW Fiber Laser · 2018-11-16 · High Power Industrial Grade Fiber Lasers...

High Power Industrial Grade Fiber Lasers

AIME on High Energy Lasers, DESY, Hamburg, 12-13 November 2014

Andreas Siewert, IPG Laser GmbH, Germany

Agenda

� Introduction

� High Power Industrial Grade Fiber Lasers

10kW Single Mode Fiber Laser (Principle, Product)

100 kW Multi Mode Fiber Laser (Principle, Product)

� Conclusion

Copyright IPG Photonics

IPG Overview

� Global leader in industrial fiber lasers

� FY 2013 sales of $648 million; YOY growth of 15%

� Growing acceptance of fiber lasers replacing tradit ional lasers

� Products are sold to OEMs, systems integrators and end users for use in many industries

� Global operations with 2,900 employees (December 20 13)


Broad End Applications and End -Users

Materials Processing84%

(1) For the quarter ended 12/31/13

Diverse end uses in Materials Processing


Global Sales and Production Capabilities

____________________Please note: IPG has 4 offices in China and 2 offices in Japan. Map excludes all rep

offices

Sales & Support

R&D, Mfg., Sales & Service

HQ, R&D, Mfg. Sales & Service

10 Application Centers

worldwide0

50

100

150

2008 2009 2010 2011 2012 2013

Sales and Marketing Headcount


Vertical IntegrationFab OperationsSemiconductor Wafer Growth

Diode Processing, Chip Mounting & Burn-In

Laser diode Packaging

Up to 120-watts of power

Fiber Draw

Draw towers

Fiber Block

Modules

Up to 2000 Watts

Final AssemblyCoupling

Final burn inShipment

ComponentsBragg Gratings

IsolatorsCouplers

Deep in technologyDeep in experience

Optical Delivery Systems: Welding & Cutting Heads, Scanners, process fibers

Optical PreformSilica based glass

MCVD methodDope with rare earth ions


Ytterbium Fiber Laser @ 1070nm

up to 10kW in SM fiber up to 30kW in 100µm fiberup to 100kW in 300µm fiber


Fiber laser schematic

-

• compact design• parallel pumping with LDM • single mode beam quality M 2 < 1.05• mechanical robust design• thermal stable• no adjustment needed


Pump Diodes

� High Power LDM� 30W CW� 60W CW� 80W CW� 120W CW

120W CW Diode

80W CW Diode

30W CW Diode

60W CW Diode

Fiber diameter100µm NA < 0.13


• Maximal power: 10 kW• Beam quality: Single Mode• Delivery fiber: 2 m• Modulation: up to 5 kHz• Consumption: ~ 32 kW• Wall-plug eff.: ~ 32%• Dimensions: 856x806x1517 mm• Weight: 650 kg

YLS-10000-SM


Output Power vs. Current

0

2000

4000

6000

8000

10000

12000

0 10 20 30 40 50 60 70 80 90 100

Set Current, %

Out

put P

ower

, W Maximal power 10,5 kW

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Central Wavelength ~ 1075nm

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There is no non-linear limitations

Output spectrum


Modulation Analog control

Up to 5kHz direct modulation demonstrated with no distortions

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Optical schematics

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• Output power: 1,4 kW

• Beam quality: BPP = 0,34 mm x mradM2 < 1,05

• Wavelength: 1070 nm

• Modulation: up to 5 kHz

• H x D x W: 332 x 532 x 52 mm

• Weight: 11 kg

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Fiber Laser Module


Powersupplies

Lasermodules

Fiber-to-fiber coupler

Electricalcomponents

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Layout


• 90 laser modules (P OUT = 1,4 kW)

• 45 IPG power supplies (P OUT = 7,5 kW, WPE > 94%)

• 6 sub-combiners with elements 19-to-1 couplers

• 1 main combiner with coupler 7-to-1

• Feeding fiber, core diameter 300 µm, length 10 m

• Integrated fiber-to-fiber coupler

• Process fiber, core diameter 500 µm, length 50 m

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Laser cabinet

• Foot print: 3600 x 800 mm

• Height: 1860 mm

• Weight: 3600 kg

• Robust industrial design• Compactness• Mobility• Easy to transport

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Test setup

Main problems:• No available 100 kW

power meters• Direct BPP measurements

are not possible due to high power density

Solution:• Beam splitter for BPP

measurements• 50% mirrors for power

measurements

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Test setup

• Portable design• 2 compact boxes

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Power measurements

Output power=

Summarized signals of 5 power meters

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Output power

Output Power vs. Current

Maximal power 101,3 kW

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Output power stability

Power instability is ± 0,2% over 30 minutes

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Beam quality measurements

after Feeding fiber

• Core Diameter: 300 µm• Measured BPP Value: < 16 mm x mrad• Numerical Aperture: 104 mrad

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Integrated fiber-to-fiber coupler

• Based on fused silica lenses with increased diameter 85 mm to decrease power density on the lenses surfaces

• Beam quality does not depend on the output power

• Stable and reliable operation at maximal power 100 kW

• Both feeding fiber and process fiber operation modes are available

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Beam quality measurements

Process fiber ø 500 µm

• Core Diameter: 500 µm• Measured BPP Value: 25 mm x mrad• Numerical Aperture: 99 mrad

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Output spectrum

Central wavelength ~ 1070,5 nmLinewidth (FWHM) ~ 4,7 nm

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There is no non-linear limitations


Up to 5 kHz direct modulation demonstrated with no distortions

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Digital modulation


Laser characteristics

• Maximal power: 101.3 kW

• Feeding fiber: 300 mm x 10 mBPP < 16 mm x mrad

• Process fiber: 500 mm x 50 mBPP ~ 25 mm x mrad

• Wavelength: 1070,5 nm

• Modulation: up to 5 kHz

• Switching on / off: 40 ms / 25 ms

• Consumption: 286 kW

• Wall-plug efficiency: ~ 35.4%

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Industrial applications• Shipbuilding – (mobile) cutting & welding

• Remote welding and cutting of large scale products in the field

• “In field” rock & concrete cutting and drilling

• Laser-mechanical drilling of ultra-hard rocks

• Heavy industry – deep penetration welding & cutting

• Nuclear power plants decommissioning

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Deep penetration welding

0

10

20

30

40

50

60

10 15 20 25 30 35 40 45 50

Laser Power kW

Pen

etra

tion

Dep

th m

m

1 m/min2 m/min3 m/min4 m/min6 m/min8 m/min

experimental extrapolated

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100 kW laser system: NADEX LASER R&D Center

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• Single mode as well as multi mode lasers are build in compact design

• Fiber lasers can be used for mobile applications du e to the robustness design

• Fiber lasers with highest efficiency, low operating cost

• No nonlinear limitation was observed up to maximal achieved power

• Higher power lasers would be available

• Customized beam quality can be offered

Conclusions


many thanks for your attention

Andreas SiewertTel.: 02736 4420 [email protected]


High Power Industrial CW Fiber Laser · 2018-11-16 · High Power Industrial Grade Fiber Lasers...

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Transcript of High Power Industrial CW Fiber Laser · 2018-11-16 · High Power Industrial Grade Fiber Lasers...