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www.esi.com Laser Business Division Very high power picosecond and nanosecond fiber lasers François SALIN, Julien SABY, Pierre Jean DEVILDER, Anthony MEUNIER, Damien SANGLA, Alexandra RAPAPORT EOLITE Systems PESSAC, France www.eolite.com

EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

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Page 1: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

Very high power picosecond and nanosecond

fiber lasers

François SALIN, Julien SABY, Pierre Jean DEVILDER, Anthony MEUNIER, Damien SANGLA, Alexandra RAPAPORT

EOLITE Systems ‐ PESSAC, France

www.eolite.com

Page 2: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

Yb doped Rod type fiberYb doped Rod type fiber

(Patented design)

200 µm 80 µm

Air clad

Pump clad area

Active core area

2 mm fused silica‐rod (whole diameter hidden)

Very large mode area: > 7000 µm2

Very high absorption: up to 30 dB/mNo photodarkening

SINGLE MODE

• 40-100 µm core

• 100-200 µm clad

• 1-2 mm outer diameter

Photonic Crystal Fiber

Page 3: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

Rod type fiber variety

Photonic Crystal Rod type fiber Distributed-Mode-Filtering (NKTP) Large Pitch Fiber (IAP)

Page 4: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

I. High Average Power nanosecond lasers

Page 5: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

Average power of Rod type fiber Q‐switched lasers at EOLITE

IR

Green

Page 6: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

• Fiber length ≈ 50 cm

• Pump diode @ 976 nm

• AOM for Q‐Switching

Laser ConfigurationLaser ConfigurationSingle stage oscillator

Page 7: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

Amplifier set-up

Page 8: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

• Pulse duration down to 8 ns• Beam Quality M2 < 1.1• Spectral width < 400 pm

Common characteristicsCommon characteristics

M2<1.1

0.4 nm

10 ns

Page 9: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

IR Q-switched laser familly

Page 10: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

310 W @ 300 kHz

< 25 ns pulsesM2 < 1.2Linear polarization 100:1

High power Q-switched rod type fiber laser

Page 11: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

Power independent beam profile 1030nm

Beam quality independent of pump power level

No adjusment, close-loop needed

75W 100W 150W 191W 241W 282W 310W

Page 12: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

Toward kW class, 10 nanosecond lasers

issue:  beam instabilities at high power in LMA fibers. Fundamental physics

Multiplexing high power lasers

Page 13: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

Wavelength multiplexing

Laser 1

Laser 2

Laser 3

λ1

λ2

λ3

Transmission Volume Bragg Grating

3 lasers 340 W 1 kWMain issue is the thermal load in the VBG

LEADERSHIP IN FIBRE LASER TECHNOLOGY (EC funded)

AIM : Demonstrate a 1 kW nanosecond system 1 kW 10 ns 10mJ @ 100 kHz M²<1.3

Page 14: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

300 W @ 100 kHz10 ns 20 – 500 kHz

M2<1.3

Toward higher powers: polarization beam combining

Temporal synchronization: < 3 ns jitter Spatial beam overlapping

Page 15: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

Laser1

Laser2Grating

Wavelength multiplexing2 lasers 1030 nm & 1047 nm

2x 210 W -> 400 W

Page 16: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

GREEN 515 nmUV 343 nm

Page 17: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

SHG Q-switched lasers @ different pump powerSHG Q-switched lasers @ different pump power

Page 18: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

150 W @

515 nm

HIGHEST diffraction limited green power

on the market

M2= 1.07

Page 19: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

Third Harmonic Generation47 W @ 343 nmType II LBO 20x3x3 mm

Page 20: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

High Power Picosecond Fiber Lasers

High Repetition rate: 30 – 80 MHz SIROCCOHigh Peak Power: 0-5 MHz HEGOA

Page 21: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

2

Laser Architecture

Pre-Amp

Main-Amplifier

Pulse picker

Page 22: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

• Output Power = 291W

• 3.7µJ / 90kW

1030nm

Sirocco IR250

80 MHz

Page 23: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division23

1030nmM² Measurement @ 291W

Mx² = 1,21My² = 1,17 

Page 24: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

2

THG Results

• 63W @ 343nm / 80MHz• THG Efficiency = 25% (for improved UV lifetime)

343nm63W

Sirocco UV50

Page 25: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

High energy picosecond fiber laser

Rod type fibers opens the road for MW peak powerpicosecond pulses

at low cost

Page 26: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

1.5 MW peak power HEGOA IR60

Page 27: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division

SummaryRod Type Fibers offer an unique opportunity to get very high

average and very high peak powers with diffraction limited beams

Kilowatt class industrial short pulses lasers are coming

10 nanoseconds300 W (400W) @ 1030 nm

150 W @ 515 nm47 W @ 343 nm

15-50 ps300 W @ 1030 nm

65 W @ 343 nm1.5 MW peak power

Page 28: EOLITE Systems PESSAC, France · THG Results • 63W @ 343nm ... 15-50 ps 300 W @ 1030 nm 65 W @ 343 nm 1.5 MW peak power. Laser Business Division . Title: Microsoft PowerPoint -

www.esi.comLaser Business Division