AKL ´12 EU Innovation Forum

High-brilliance Fiber Laser Sources with new

NIR Wavelengths

T h e P o w e r t o T r a n s f o r m TM

High Power Fiber Lasers and Amplifiers

Dipl.-Wirtschafts-Ing. (FH) Tim Westphäling

2 Copyright IPG Photonics

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1. Overview of IPG´s different Fiber Laser types

2. Setup of Erbium doped Fiber Lasers (1.567 nm wavelength)2.1. Single Mode2.2. Multi Mode

3. Setup of Thulium doped Fiber Lasers (1.940 nm wavelength)

4. Summary

Overview

3 Copyright IPG Photonics

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Overview of IPG´s fiber laser families

Erbium

Fiber Lasers Thulium

Fiber Lasers

532 980 1070 1550 2000

1W

100W

100KW

10W

1KW

GLR

GLPM

Wavelength ( nm )

La

se

r P

ow

er

DLR

DLM

YLS

YLS-QCW

YLR

YLR-QCW

YLM

YLP-HP

YLP

Ytterbium

Fiber Lasers

Diode

Lasers

green

Fiber Lasers

TLR

TLM

ELS

ELR

ELM

ELP

4 Copyright IPG Photonics

Overview of IPG´s fiber laser families

-

Erbium

Fiber Lasers Thulium

Fiber Lasers

532 980 1070 1550 2000

1W

100W

100KW

10W

1KW

GLR

GLPM

Wavelength ( nm )

La

se

r P

ow

er

DLR

DLM

YLS

YLS-QCW

YLR

YLR-QCW

YLM

YLP-HP

YLP

Ytterbium

Fiber Lasers

Diode

Lasers

green

Fiber Lasers

TLR

TLM

ELS

ELR

ELM

ELP

5 Copyright IPG Photonics

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Overview of IPG´s fiber laser families

Erbium

Fiber Lasers Thulium

Fiber Lasers

532 980 1070 1550 2000

1W

100W

100KW

10W

1KW

GLR

GLPM

Wavelength ( nm )

La

se

r P

ow

er

DLR

DLM

YLS

YLS-QCW

YLR

YLR-QCW

YLM

YLP-HP

YLP

Ytterbium

Fiber Lasers

Diode

Lasers

green

Fiber Lasers

TLR

TLM

ELS

ELR

ELM

ELP

6 Copyright IPG Photonics

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• Compact and monolithicDesign

• Parallel adjustment of LDM • Monomode-Beam quality• M2 < 1.05• Robust mechanical setup• Thermal non-sensitive• no adjustment /

maintenance

609 May 2012

Concept of Erbium doped fiber lasers (1.5 µm wavelength)

7 Copyright IPG Photonics

Multimode, Broadband Pumpdiode 975nm, NA 0.12, M2 >20 Fiber Laser 1 / 1,5µm, NA 0.06, M

2 = 1

Low Beam Quality High Beam Quality

Conversion of Brightness

709 May 2012

8 Copyright IPG Photonics

IPG Photonics Confidential Information

Laser diode Packaging

PLDs 5-25

Optical Preform

Silica based glass

MCVD method

Dope with rare earth ions

Fiber Draw

Draw towers

Active fibers only

>200 different fibers

Fiber Block

Pod of active fibers

Modules

Up to 800-1000 Watts (1070 nm)

Final Assembly

Coupling

Final burn in

Shipment

Components

Bragg Gratings, Isolators

Couplers

Fab Operations

Semiconductor Wafer Growth

Diode Processing

Chip Mounting

Burn-In

809 May 2012

Needed Components for Fiber Laser Production

9 Copyright IPG Photonics

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Single Mode Fiber Laser Rack / Module

10 Copyright IPG Photonics09 May 2012 10

3U Housing of 120 W Erbium doped Fiber Laser

11 Copyright IPG Photonics09 May 2012 11

Collimator output of TLR-120 and ELR-120

12 Copyright IPG Photonics

IPG Fiber Laser Modul Combination

12 09.05.2012 IPG Photonics Confidential Information

+ + + + = XLXXLXXXL

Modules are combined according to the requested Power = scaleable and upgradeable Power � custom design

13 Copyright IPG Photonics09 May 2012 13

ELS-500 shipped to ILT beginning of 2012

1567 nm, 500 W, Multimode Fiber Output

First Multimode Fiberlaser @ 1.5 µm wavelengthwith 500 W Output power

14 Copyright IPG Photonics09 May 2012 14

Fiber connector in QBH design

15 Copyright IPG Photonics09 May 2012 15

Top Hat Beam Profile

• Realized with 200 µm Multimode Feeding Fiber of ELS 500

16 Copyright IPG Photonics

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Overview of IPG´s fiber laser families

Erbium

Fiber Lasers Thulium

Fiber Lasers

532 980 1070 1550 2000

1W

100W

100KW

10W

1KW

GLR

GLPM

Wavelength ( nm )

La

se

r P

ow

er

DLR

DLM

YLS

YLS-QCW

YLR

YLR-QCW

YLM

YLP-HP

YLP

Ytterbium

Fiber Lasers

Diode

Lasers

green

Fiber Lasers

TLR

TLM

ELS

ELR

ELM

ELP

17 Copyright IPG Photonics09 May 2012 17

General Setup of Thulium doped Fiber Lasers

18 Copyright IPG Photonics09 May 2012 18

0 20 40 60 80 100 120 140 160 180 200

0

20

40

60

80

100

120

Tm

Laser

Ou

tpu

t P

ow

er,

W

Yb/Er Lasers' Total Power, W

0 50 100 150 200 250 300 350 400 450 500 550

0

20

40

60

80

100

120

140

T

m L

aser

Ou

tpu

t P

ow

er,

W

PLDs' total power, W

Output Power and Efficiency

Up to 120 W Output Power @ 1.9 µm wavelength

Wall plug efficiency > 10 %

19 Copyright IPG Photonics09 May 2012 19

1998 1999 2000 2001 20020,0

0,2

0,4

0,6

0,8

1,0

Re

lative

Inte

nsity

Wavelength, nm

� Extremely broad spectral range:

1850 – 2050 nm

� Narrow linewidth – less than 1 nm

Spectral Properties

20 Copyright IPG Photonics09 May 2012 20

Beam Profil at 300 mm focal length

Copyright IPG Photonics

Transient Characteristics

Switching On Time 550 µµµµs Switching Off Time 250 µµµµs

Modulation with PRR = 3 kHz

Direct modulation of semiconductor emitter diodes’(PLDs) current

� Fast switching ON/OFF

� Relatively high modulation

frequencies

22 Copyright IPG Photonics

Erbium and Thulium Erbium and Thulium dopeddoped Fiber LasersFiber Lasers

�� Power up to 120 W Power up to 120 W singlesingle mode (Tm mode (Tm dopeddoped @ 1.940 nm)@ 1.940 nm)

�� Power up to 500 W multi mode (Power up to 500 W multi mode (ErEr doped @ 1567 nm)doped @ 1567 nm)

�� Robust concept for industrial usageRobust concept for industrial usage

�� Long Long termterm teststests: : ThousandsThousands of of hourshours withoutwithout power power decreasingdecreasing

�� Fast Fast modulationmodulation byby directdirect switchingswitching of of PLDsPLDs

�� ELSELS--500 Multimode: Top hat 500 Multimode: Top hat beambeam profil profil byby usageusage of of multimulti mode mode

fiberfiber

SummarySummary

23 Copyright IPG Photonics

Thank you for your attention!