sub-ns microchip lasers technology: overview and progress in
TRANSCRIPT
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Sub-ns Microchip Lasers Technology: Overview and Progress in Health Science
and Industrial Applications
Florent Thibault
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AgendaAgenda
1. Company overview2. Laser technology
3. Added value for the process4. Conclusion and perspectives
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1 – Company overview1 – Company overview
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www.teemphotonics.com
Near Grenoble, hotbed of French technologyNearNear Grenoble, Grenoble, hotbedhotbed of French of French technologytechnology
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Corporate backgroundCorporateCorporate backgroundbackground
• Founded November 1998 (Spin-off Schneider Electric/GeeO)• Privately held• HQ in Meylan near Grenoble• Transformed business model from telecom to commercial l asers
> Pioneered integrated optical EDWATM
> Acquired MIT-based picolaser line in 2005 from JDSU
• Successfully integrated acquisition� 6000 picolasers shipped
• 40 people• Cleanroom production facility• Worldwide presence, US-sales office,15 distributors
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Secured Intellectual PropertySecuredSecured IntellectualIntellectual PropertyProperty
Teem Photonics owns or controls the intellectual property relevant to all its products:
• Exclusive IP rights on Passively Q -Switched picosecond microlaser, patent number US 5394413> pulse duration are under 1 ns> or> peak powers are in excess of 10 kW> or> ratio of peak power to pump DC power are above 10 000.
• License agreement on high power fiber technology with IMRA
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Volume capable and flexible manufacturingVolume capable and flexible manufacturing
• High End production floor � Class 10000 clean rooms and class 100 workstations � Production of > 100 lasers /month� Low fixed manufacturing costs � Proven high production yields
• Strong in-house R+D team (20% of all employees)� Laser design� Mechanical design� Electronics design� Software design
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2 – Laser technology2 – Laser technology
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The simplest of the Ultrafast lasersThe simplest of the Ultrafast lasers
• Microchip technology> Cost-effective > Reliable> Compact and rugged
• Passive Q-switching> Remarkable pulse characteristics> Naturally good beam quality
« Picolasers » = passive Q-switched microchip lasers
Based on a unique technology combination:
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Picolaser principle of operationPicolaser principle of operation
Laser Material
SaturableAbsorber
Mirrors
Pump diode
Picolaser
Picolasers “naturally”turns the continuous power of a semiconductor laser diode into a stream of picosecond pulses, without any external electronic devices.
• 2 main Picolaser product lines (non amplified) :> Microchip : high repetion rate, lower energy> Powerchip : high peak power, on-demand pulse emission
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Picolasers performances overviewPicolasers performances overview
• At 1064nm, from the oscillator output :> Pulse duration : down to 300ps> Peak power : up to 300kW> Pulse energy : up to 100µJ> Repetition rate : up to 140kHz> Output power : up to 400mW> Beam quality : TEM00, M²=1.05 typ .
• Some drawbacks still…> Limited output power due to small cavity volume> Limited process orientated controls
• Reliability : Over 45,000 hours of operation @ 1064nmMTTF ~ 17,000,000 hours
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Overcoming output power limitationOvercoming output power limitation
• Development of fiber-based MOPA architecture to reachhigher power levels while valorizing Picolasers pulse characteristics and industrial grade reliability.
> PicoFlash™ seriesUp to >5W@1064nmUp to 40kW peak powerUp to 140kHz rep.rateTEM00, M²=1.05 typical
> PicoSpark™ seriesUp to >10W@1064nmUp to 200kW peak powerDown to 750ps pulsesTEM00, M²=1.05 typ.
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Making laser integration easierMaking laser integration easier
• Development of OEM integration and process orientated functionnalities:
> Output trigger for synchronization with other equipments> Fast On-Off functionality dedicated to high speed processing
(scanners head)> Real time output energy control for complex all-automated
processing> Output security signals for global laser safety management
< 1ms rise time and fall time in
Fast On-Off mode
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Extending to shorter wavelentghsExtending to shorter wavelentghs
• Intrinsic capacity to convert efficiently to Deep UVwavelengths thanks to high peak power
>All Picolasers series available down to 266nm>PicoFlash™ series lasers available down to 355nm>High peak power PicoSpark™ lasers down to 532nm
• Design and know-how combine to provide over 25,000 hours of operation @266nm for Picolasers
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3 – Added value for the process3 – Added value for the process
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Main features from the applicative point of viewMain features from the applicative point of view
• Laser characteristics :> High peak power / Short pulse> UV wavelengths> Cost effective and reliable> Compact and air-cooled
• Favourite playgrounds :> High resolution marking & scribing of virtually all materials> Controlled heat-input selective ablation processes> NL interaction driven processes (Supercontinuum, TPA)> UV or DUV applications > Industrial environment
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Hard materials processing capabilityHard materials processing capability
• Key parameter : high peak power
• Good surface quality and removal rate demonstrated for machinig oxydes, diamond-like structures, ceramics, hard metals..
• Applications / Markets:> Diamond, PCD, CVD
marking and scribing
> Ivory, tooth, dental ceramics machining
> SiC drilling
> Titanium layersselective ablation
(1) Dental ceramics machining (Image courtesy of ILT, Germany)
(2) PCD machining (Image courtesy of ILT, Germany)
(1)(1)
(2) (2)
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Transparent materials processing capabilityTransparent materials processing capability
• Key parameter : high peak power
• Applications / Markets:> Biomedical : Lasik surgery,
cataract surgery> Glass plate cutting for touch-
screens or biological applications> Bulk marking transparent plastics
for traceability purpose (CR39, Polycarbonate,1.67)
> Anti-counterfeit semi-transparent bulk marking for watch glasses
• Thin glass plates cutting with µm-scale chipping• Bulk marking with excellent repeatability proved in
various structures (crystal, glass, plastic) – No µcracks
(3) Pig eye flap (Image courtesy of Luebeck university, Germany)
(4) Glass engraving (Musée de la dentelle, France)
10µm
(3)
(4)
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Reflective material processing capabilityReflective material processing capability
• Key parameter : high peak power
• Micron-scale texturing thanks to low HAZ• Marking on metals even at low energy
• Applications / Markets :> Surface texturing of metals
parts to reduce friction (PicoSpark™ )
> Fine scale scribing of castor injection moulds
> Highly reflective metalsplain marking
(5)
(5) Stainless steel machining
(6) Single-pulse marking on aluminium (6µJ only)
(6)25µm
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Controlled heat input micromachiningControlled heat input micromachining
• Key parameter : short pulses
• Improved quality compared to ns lasers whileconserving the economical figure
• Cost-effective alternative to ultrafast lasers or EDM
• Applications / Markets :
> Multilayers selective removal (ITO, LEP,…)
> Electronics : to manage increasingcomponents density (PCB trackscorrection, glue removal)
> Polymers ‘cold’ processing(polyimide, PET, polyurethane,..)
> Micromachining of thin metal foils(clock-making, micromechanics)
(7) Flex PCB cutting – Cut in 500µm thick polymide layer with 532nm (image courtesy of ILT, Germany)
(8) PET cutting – Cut in 15µm thick PET with 355nm (image courtesy of ILT, Germany)
(7)
(8)
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Cost-effective UV solutionsCost-effective UV solutions
• Applications / Markets :> Photoluminescence (UVLED
wafer testing, LIF)> Biomedical (µ-dissection)> PCB repair> LCD/FPD panel repair> Excimer lasers replacement
market
• For industrial environment• Can reduce the COO of excimer lasers based processes
• Key parameters : cost efficiency, high peak power
(9)
(9) Laser-induced fluorescence (Courtesy of Kinzle, Germany)
(10) Micro-dissection of biological tissue (Courtesy of mmi, Germany)
(10)
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4 – Conclusion and perspectives 4 – Conclusion and perspectives
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Conclusion and perspectives Conclusion and perspectives
• Market evolutions seem to be increasingly pointing towards such laser solutions
• Qualified applications fields continuously expanding, with a wide range of segments already penetrated so far :> Eye surgery with flap making> Photovoltaics with CIGS cell patterning> Electronics and displays with PCB, LCD and FPD repair> More to come…
Picolasers can offer picosecond class laser solutions at nanosecond economics
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Thank you !Thank you !