June Boeing Jan 2008: not 2008: published 15 kW > 25 kW nearly diffraction nearly diffraction limited limited
5
5 Advances in High Power Lasers
10
15 Output power [kW]
20
University of Virginia - November 2010
25
30 2
Disk Laser Concept Rod Laser
Disk Laser
Laser Emission Pump light Quasi frontal
T T r
- Parabolic temperature profile - Cooling and Pumping via lateral area Advances in High Power Lasers
r
- Flat temperature profile - Cooling via base area University of Virginia - November 2010
3
TruDisk – Product portfolio Power [1]
BPP
Fiber φ
(kW)
(mm-mrad)
(μm)
Number of disks
2-4
4-8
≥ 100
1
>4 - 8
4-8
≥ 100
2
>8 - 12
8
≥ 200
3
>12 - 16
8 - 12
≥ 200
4
[1] Power guaranteed at workpiece
Advances in High Power Lasers
University of Virginia - November 2010
4
TruDisk – Extremely long diode life
Passively cooled diodes Cooled with non-DI water Life expectancy commensurate with single emitter diodes Modular, non-spliced architecture
Advances in High Power Lasers
University of Virginia - November 2010
5
TruDisk – Compact
1 2 3 5
1
Pump unit
2
Cavity
3
Laser resonator
4
Power feedback sensor
5
Central shutter
4
Advances in High Power Lasers
University of Virginia - November 2010
6
TruDisk 4002 – 4 outputs
Advances in High Power Lasers
University of Virginia - November 2010
7
TruDisk – Power scaling / field upgradeability 6 pump modules per disk w/ 4 kW laser
6 pump modules per disk w/ 4 kW laser power per disk
power per disk Power scaling per disk by number of pump
Power scaling per disk by number of pump modules
modules
Output power scaling of laser with number of coupled disks
# of pump modules
Power per disk (kW)
6
4
5
3.3
4
2.6
3
2
Output power scaling of laser with number of coupled disks
Advances in High Power Lasers
University of Virginia - November 2010
8
TruDisk - Closed loop power control Laser power is constant at the work piece Reproducible processing results Back reflections without any influence! No warm-up time Power range 3% - 100%
Advances in High Power Lasers
University of Virginia - November 2010
9
TruDisk – Industrial optical interface
Fiber exchange without any alignment Laser safe compartment Hot-plug capable Field upgradeable fiber outputs TRUMPF Laser Network
Why did Trumpf choose the disk laser architecture over the fiber laser architecture for high power? Both are solid state Both are diode pumped with long life diodes Both are fiber optic delivered Both have excellent BPP Both are compact Both have excellent WPE Both are “non-monolithic” for industrial applications Only the disk laser is truly modular: -
Field upgradability of power with no splicing required The disk laser yields the minimum risk & downtime There are no potential failure modes that require factory repair Therefore, no need for the laser itself to be a “spare part” Diode replacement without splicing
Only the disk laser has uncritical power densities on the active medium Only the disk laser is insensitive to back reflections Advances in High Power Lasers
University of Virginia - November 2010
14
Diode Laser Concept Rod Laser
Disk Laser
Diode Laser
Laser Emission Pump light Quasi frontal
T T r
r
-+ - Parabolic temperature profile - Cooling and Pumping via lateral area Advances in High Power Lasers
- Flat temperature profile - Cooling via base area
Direct conversion of current to light
University of Virginia - November 2010
15
Application fields 50
TruDisk Heat treatment / brazing
BPP [mm mrad]
40
TruDiode
30 Welding 20
10 8 4
Cutting / Remote welding 1
Advances in High Power Lasers
2 3 Laser power in kW
4
5
University of Virginia - November 2010
16
TruDiode Series Long diode lifetime Highest wall plug efficiency
Lowest running costs
Compact & Modular design Beam quality and power
L A S E R
TruDiode
Advances in High Power Lasers
University of Virginia - November 2010
17
Increase of wall plug efficiency of high-powered solid-state lasers TruDiode 4006 (direct diode)
Wall plug efficiency [%]
40 TruDisk 4002
(diode pumped disk)
30
HLD 4506
20
(diode pumped rod)
HL 4006D
10
(lamp pumped rod)
1995 Advances in High Power Lasers
2000
Year
2005
University of Virginia - November 2010
2010 18
TruDiode Products
Power [kW]
Fiber ∅ [µm]
NA
TruDiode 804
0.8
≥ 400
0.11
TruDiode 1006
1
≥ 600
0.11
TruDiode 2006
2
≥ 600
0.11
TruDiode 3006
3
≥ 600
0.11
TruDiode 4006 [1]
4
≥ 600
0.11
[1] Available Q2, 2011 Advances in High Power Lasers
University of Virginia - November 2010
19
TRUMPF Diode Module – the building block Extremely long life due to … Passive Cooling - Simple macro-channel heat sinks remove all issues with water chemistry and erosion - No voltage present in the heat sink channels removing all electro-corrosion issues Hard solder - No soft solders used removing all solder migration and thermal fatigue issues CTE matched heat sinks - Expansion matched packaging allows high current thermal cycling and minimizes thermal fatigue issues Advances in High Power Lasers
University of Virginia - November 2010
20
Power Scaling
N = 19 Power scaling
d = 5 x dmodule
P = N x Pmodule BPP = N0,5 x BPPmodule
N=7 d = 3 x dmodule
Advances in High Power Lasers
University of Virginia - November 2010
21
Power Scaling Efficient coupling of up to 19 modules
Laser unit Advances in High Power Lasers
University of Virginia - November 2010
22
Power Scaling Efficient coupling of up to 3 laser units Laser unit 1 Wavelength λ1 Power P1 Beam quality BPP1
Wavelength coupling
Laser unit 2 Wavelength λ2 Power P2 Beam quality BPP2
Exit laser beam Wavelength λ1+ λ2 Power Pges = P1 + P2 ex 600 µm BPP = BPP1 = BPP2 Advances in High Power Lasers
Why will the direct diode laser be the disruptive laser technology of the not too distant future? Eliminates the “middle-man” Highest WPE of all solid state lasers Extremely compact Lowest cost high power laser architecture Good BPP, and getting better & better ! When BPP’s & power levels of the direct diode match the high power disk & fiber lasers, the direct diode laser will take over those associated applications (i.e. remote welding, high speed cutting, hybrid welding, etc.)
![High power laser diode DRIVER for DPSS lasers ALTx10A-2TEC-LCD (OEM version) version firmware [2008]](https://kipdf.com/img/300x300/high-power-laser-diode-driver-for-dpss-lasers-altx_5aca0c4d1723dd237d0f5ca6.jpg)
