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y t l i HEA D O F F IC E L it ro n L a s e rs Ltd 8 Con su l Roa d R u g by Wa r w i c ksh i re C V 2 1 1 PB E ng l a n d b i T + 4 4 ( 0 ) 1 7 8 8 5 7 4 4 44 F + 4 4 (0 )1 7 8 8 5 7 4 8 8 8 E s a l es @ l i t ro n . co. u k p a NORT H A MER I C A N OF F I CE L it ro n L a s e rs N o rt h A m erica 24 49 A r n i c a D r i v e B o ze m a n M T 59715 USA C a T +1 (4 0 6) 5 2 2 7 5 6 6 F +1 (4 0 6) 5 2 2 7 5 67 E [email protected] r t i L Our policy is to improve the design and specification of our products. The details given in this document are not to be regarded as binding. © 2010 Litron Lasers Ltd. Printed in England. PB 0109:4 o n T o t a l L a s e r w w w. l i t r o n l a s e r s . c o m Lasers for PIV Applications L a s e rs fo r PI V A pplic at io ns Resonator Design Th e Heart of th e Litron System Litron offers an extensive range of flashlamp laser output) the beam spatial profile often has Stable Resonator pumped and diode pumped PIV laser systems significant structure to it. This phenomenon is A stable resonator provides the most flexibility preferred method is the use of a telescopic with output energies of up to 1J per pulse and typical of this resonator design and is a result of in terms of output energy and repetition rate, as resonator. In this configuration, an intra-cavity repetition rates of up to 200Hz for flashlamp the physics of the system making it unsuitable for both parameters can be varied with minimal telescope is used to reduce the beam diameter systems and up to 20kHz for diode pumped forming uniform light sheets. effect upon the alignment of the system. in the rear of the resonator. This makes the In general, the output of such systems is resonator appear longer, increasing the lower multi-mode. With the addition of an intra-cavity order mode volumes, leading to a superior output aperture, a TEM00 output can easily be realised at beam with very low divergence. With no optical the expense of some of the overall energy. adjustment at all, the laser can be varied over a systems. All of the systems are twin head devices, meaning that the PIV laser head contains It is our philosophy to provide a laser system two totally independent lasers. The range of PIV that suits an application. A ‘one system fits all’ systems is based around both the ultra-compact approach, as offered by most manufacturers, does Nano series and the larger invar stabilised LPY not allow the customer to optimise their process. Gaussian Optics maintaining a high quality, low divergence beam. and LDY series. The overriding factor that sets For applications such as PIV Litron has developed In a Gaussian system, a graded reflectivity output With slight adjustment to the telescope (a simple Litron’s products apart is quality. This is evidenced resonators that will yield extremely uniform light mirror is used as part of a geometrically unstable procedure) the full range of energies and repeti- not only in the design and construction of the sheets whose pulse to pulse structure remains resonator. Such systems give a high energy single tion rates from single pulse to the maximum can product, but also in its performance. extremely constant. These are all based around transverse mode with a low beam divergence. be achieved. For high energy TEM00 beams, an The thermal lens formed by the laser rod is part intra-cavity aperture can be fitted behind the of the optical arrangement. Therefore, telescope. Varying the sizes of these apertures Gaussian systems work best at a constant aver- allow output beams that are to within 15% of the age input power (i.e. lamp energy and repetition diffraction limit to about 3.5 times the wide range of pulse energies and repetition rates, our stable and stable - telescopic resonators. In any imaging application the beam quality is of paramount importance as this completely determines the light sheet quality. By choosing a 1 suitable resonator configuration the output beam Rear Mirror Q-Switch Nd:YAG Rod Output Coupler quality can be controlled to give a very smooth 2 spatial profile which remains homogeneous as it Graded Reflectivity Output Coupler propagates through to the far field. Such 3 resonators are almost always of a stable or staRear Mirror Aperture Telescope Q-Switch Nd:YAG Rod ble-telescopic configuration. Unstable Gaussiancoupled resonators are not in general ideal for visualisation applications. These resonators produce very good Gaussian spatial profiles with low divergence in the far field, however, in the Schematics showing oscillator design. 1) Stable 2) Gaussian 3) Stable Telescopic TEM00 resonators can also be offered with the inclusion of an intra-cavity aperture. Output Coupler frequency). As such, the laser is factory diffraction limit. That is from an almost pure set at one pulse repetition frequency Gaussian TEM00 to full energy in a uniform spatial and output energy. To increase flexibility, profile, giving a high degree of control over light Litron offers two options. The first sheet characteristics. option, the pulse repetition rate divider allows the user to divide the set Optical Attenuator repetition rate by 2, 4, 8 or 16. This Energy output can be controlled via the variable works by allowing the flashlamp to pulse at a set optical attenuator. The output energy of the laser frequency, thus maintaining the same thermal can be attenuated by the use of an extra-cavity load on the laser rod, but only switching the polariser and half wave plate, whilst maintaining Pockels cell on the desired pulses (i.e. every other the beam quality and divergence. pulse for divide by two operation). This also has the advantage that the pulse to near to intermediate fields (within 10m of the Telescopic Resonator pulse stability is maintained even at very low To obtain high energy, low divergence beams, the output energies. Co m p a c t Laser s fo r PI V A pplicat io ns T h e N a no PI V Ser ies NANO PIV FEATURES Nano PIV • Compact dual head design • Dedicated PIV laser head Nano L PIV The construction of the Nano series of PIV laser interface . All trigger and synchronisation signals systems is extremely robust. They have been are TTL compatible and each laser is controllable developed as industrial tools that can be handled entirely independently. without worry of misalignment or damage. The • Stable resonator design • Telescopic versions for low divergence • Rugged for industrial environments PIV head is formed by an aluminium gauge-plate All Nano laser heads have a verified electronic onto which two standard Nano series heads are intracavity safety shutter as standard, which mounted. The output beams are combined by ensures that the lasers cannot be started with the dielectric polarisers and then frequency doubled, shutter open – an important safety feature. and if desired can be frequency tripled, • 3rd and 4th harmonics available for LIF and dual colour PIV • Rep. rates to 200Hz • Energies up to 425mJ @ 532nm Schematic showing the Nano PIV laser harmonic generation options. Option 1 532nm Output Only Nano TRL PIV quadrupled or quintupled. Many of the Nano PIV The Nano L PIV range also includes high repetition systems are powered by a single power supply rate models giving energies of up to 50mJ per unit, making the overall package both powerful pulse at 100Hz from each laser using a power and portable. supply that is completely air cooled. There are two twin power supplies available, the The Nano T PIV range has been designed LPU450-PIV and the LPU550- PIV, the latter incorporating stable telescopic resonators, giving allowing outputs of up to 200mJ at 532nm at very low divergence output beams that allow 15Hz from each laser. The laser systems are thinner light sheets to be formed than from controlled via a remote controller or via RS232 conventional stable resonators. Harmonic Generation Unit 1064nm Beam Dump 2HG Unit Option 2 Option 3 355nm/266nm Output Only 532nm/355nm/266nm Combined Output For large area illumination, high energies are achieved with the birefringence compensated Nano TRL range which achieves output energies 3HG/4HG Unit 3HG/4HG Unit Laser 2 Laser 1 532nm Beam Dump Optional Attenuator of up to 450mJ per pulse at 532nm, 10Hz. The footprint of the head is an extremely compact Laser 2 Laser 1 Laser 2 Laser 1 at 908mm x 270mm. The N a no PI V S e ri e s S p e c i fi cat io ns Model Repetition Rate per Laser Head (Hz) Output Energy at 532nm per Laser Head (1) (mJ) Parameter Pulse - Pulse Stability (±%) Beam Diameter (mm) Beam Divergence (mrad) Pulse Length @ 1064nm (ns) Pointing Stability (µrad) Resonator Type Lamp Life (pulses) Timing Jitter (ns) Services Voltage (VAC) Frequency (Hz) Power Ambient(2) (˚C) Consumption (W) Cooling Power supply Nano S 30-15 PIV Nano S 30-30 PIV Nano S 50-20 PIV Nano S 65-15 PIV Nano L 200-15 PIV Nano L 145-15 PIV Nano L 150-20 PIV Nano L 50-50 PIV Nano L 100-50 PIV Nano L 50-100 PIV Nano T 180-15 PIV Nano T 135-15 PIV Nano TRL 250-20 PIV Nano TRL 325-15 PIV 0-15 0-30 0-20 0-15 0-15 0-15 0-20 0-50 0-50 0-100 15 15 20 15 30 2 3 ~2.0 5-8 <100 Stable >5x107 <0.5 110-250 47-63 Single Phase 5-35 <350 Air 30 2 3 ~2.0 5-8 <100 Stable >5x107 <0.5 110-250 47-63 Single Phase 5-35 <350 Air 50 2 4 ~2.5 6-8 <100 Stable >5x107 <0.5 110-250 47-63 Single Phase 5-35 <350 Air 65 2 4 ~2.5 6-8 <100 Stable >5x107 <0.5 110-250 47-63 Single Phase 5-35 <350 Air 200 145 150 50 100 50 180 135 250 2 6.5 ~3 6-9 <100 Stable >5x107 <0.5 2 5 ~3 6-9 <100 Stable >5x107 <0.5 2 6.5 ~3 6-9 <100 Stable >5x107 <0.5 2 4 ~2 5-8 <100 Stable >5x107 <0.5 2 4 ~2 5-8 <100 Stable >5x107 <0.5 2 4 ~2 5-8 <100 Stable >5x107 <0.5 2 6.35 0.8 7-9 100 Telescopic 5x107 0.5 2 5 0.8 7-9 100 Telescopic 5x107 0.5 2 6.35 <1.5 5-7 100 Telescopic 5x107 0.5 110-250 47-63 Single Phase 5-35 <800 Air 110-250 47-63 Single Phase 5-35 <650 Air 110-250 47-63 Single Phase 5-35 <800 Air 110-250 47-63 Single Phase 5-35 <800 Air 220-250 47-63 Single Phase 5-35 <2500 Air 220-250 47-63 Single Phase 5-35 <2500 Air 110-250 47-63 Single Phase 5-35 <800 Air 110-250 47-63 Single Phase 5-35 <650 Air 220-250* 50-60** Single Phase 5-35 <2500 Air LPU450 LPU550 LPU450 LPU450 LPU550 LPU550 LPU550 LPU550 2xLPU1000 2xLPU1000 LPU550 LPU550 2 x LPU1000 Nano TRL 300-20 PIV Nano TRL 425-10 PIV Nano TRL 400-15 PIV Nano TRL 400-20 PIV 20 10 15 20 325 300 425 400 400 2 8 <1.2 5-7 100 Telescopic 5x107 0.5 2 9.5 <1.0 5-7 100 Telescopic 5x107 0.5 2 9.5 <1.0 5-7 100 Telescopic 5x107 0.5 2 9.5 <1.0 5-7 100 Telescopic 5x107 0.5 2 9.5 <1.0 5-7 100 Telescopic 5x107 0.5 220-250* 220-250* 50-60** 50-60** Single Phase Single Phase 5-35 5-35 <2500 Air Water 220-250* 50-60** Single Phase 5-35 <2500 Air 220-250* 50-60** Single Phase 5-35 <4500 Water 220-250* 50-60** Single Phase 5-35 <5500 Water 2 x LPU1000 2 x LPU1000 19” Rack 19” Rack 19” Rack (1) At maximum rep. rate. (2) 0-80% non condensing atmosphere. * 110VAC option requires autotransformer to be specified on order. ** 50 or 60Hz to be specified on order. Nano L PIV Laser Head Nano S PIV Laser Head 179 485 Nano T PIV Laser Head 208 81 93 93 43.5 720 208 580 LPU450 PSU 110 57 35.5 35.5 LPU550 PSU LPU1000 PSU 908 270 50 50 30.5 Nano TRL PIV Laser Head 76 Rack-mount PSU Remote Control Box 52.5 453 145 555 615 Ô 408 790 (16U) 252 408 252 502 238 ï 78 All dimensions shown in mm 700 ï 605 180 V i b rat i on & Shock Proof, Ultra Ruggedized L a s e r for PI V A pplic at io ns in D emanding E nv i ro nments T h e B e rno ulli PI V Ser ies MOBIUS™ - Microprocessor control and is suited to operation in almost any environment. monitoring of all laser parameters. The new bernoulli™ PIV from Litron is the most Standardised PSU – Mobius™ configures the PSU advanced plug and play’ PIV laser system to the laser head. available today. It benefits from Litron’s years of experience in this • Ability to operate in all orientations field and the expertise gained • Compact size PIV laser manufacturer. B-PIV 200-15 B-PIV 135-15 Wavelength (nm) Pulse repetition rate (Hz) Pulse energy @ 532nm (mJ)(1) 0-15 200 B-PIV 120-20 B-PIV 100-25 0-20 120 0-25 100 532nm 0-15 135 Pulse to pulse energy stability (%pk-pk) <2 Pulse width (ns)(2) ≤10 Near field beam diameter (mm) 6.5 5 5 <3.5 Beam divergence (mrad)(3) Shot to shot pointing stability (µrad) <100 Far field beam overlap (µrad) ±100 Near field beam overlap (µm) ±100 Polarisation Linearly polarised, vertical plane Spectral Purity (%) >99.5% 5 System requirements Power input (VAC) 110-250 (50-60Hz) Operating ambient (°C) 10 to 30 5 to 50 Storage ambient (°C) (4) Coolant Deionised Water External trigger 5V TTL Standard umbilical length (m) 2.5 Rugged • Motorised attenuator fitted as standard Vibration and shock proof for use in rough environments. Accurate internal pulse generator – No third • High frequency options also available Fully sealed laser head – protection from dust party timing equipment required. System Data Laser head warranty 24 Months PSU warranty 24 Months Flash lamp warranty 100 Million Shots/24 Months IP67 Laser head sealing (5) Laser PSU sealing and moisture. Ruggedized oscillator – fixed mirror design adds Easy to Use to oscillator alignment stability. Auto start up and touch screen control. LUCi™ remote interface - Reliable provides all functions at the touch 2 Year warranty includes Optics, PSU & Laser of a button. head. Motorised attenuator fitted as 2 Year warranted alignment and overlap – standard – 1000 step energy control. All components locked into position in a separate Alignment mode - sets attenuator to allow compartment. alignment of external optics. (1) (2) (3) (4) (5) IP21 Per laser at maximum rep. rate. High Frequency Options - 50Hz and 100Hz variants are also available. At maximum energy 532nm (FWHM) Full angle for 90% of the output energy. All cooling water removed. With suitable connector set as an option, not suitable for full immersion. Laser Head LPU550 Power Supply OPTIONAL ADAPTOR PLATE 1.035" - 40 T HREADED HOLE 555 OK L ASER 9.75 150 535.00 STOP 532nm OUTPUT 200 Portable Ability to operate in all orientations. 120.00 • Fast connections & start -up from being the World’s leading Model 68 408 Compact size – strengthened and lightened 150.00 aluminium monolithic body. Fast connections at the laser head and PSU – LUCi Romote Controller OK L ASER easy to transport and set-up. 252 101.50 48.50 TY P • 2 year warranty From wind tunnels to wind farms the bernoulli™ 76.50 • Fully sealed laser head Intelligent 150 75.00 • Vibration & shock proof Bernoulli PIV Laser System. 131.50 T Y P BERNOULLI PIV FEATURES Th e Bern oulli P IV Series Specification s STOP 200 68 55.00 TY P 263.00 4xM6x1 - 6H T HREAD 8.00 455.00 TY P 408 H i g h E nergy & High Repetition Rate L a s e r s for PIV T h e L P Y PI V Ser ies LPY PIV FEATURES • Dedicated PIV laser head Th e LP Y P IV Series Specification s LPY PIV For higher energy systems or systems where very The modular construction of the LPY series laser low divergences are required Litron offers twin heads allows for easy customisation of systems. Model Repetition Rate per Laser Cavity (Hz) Output Energy at 532nm per laser head (mJ) configurations of its invar stabilised LPY series. • Frequencies up to 200Hz • High pulse energies up to 1J • True TEM00 output available Output energies of up to 1J per pulse of 532nm at Options include variable optical attenuation, repetition rates of up to 20Hz are available as line-narrowing etalons, injection seeding and standard, as are outputs of 100mJ at 532nm third, fourth and fifth harmonic outputs. Parameter Pulse Stability @ 532nm (±%) Beam Diameter (mm) Beam Divergence (mrad) Pulse Length @ 532nm (ns) Pointing Stability (µrad) Lamp Life (pulses) Timing Jitter (ns) at 200Hz. • Stable resonator design • Telescopic versions for low divergence • 3rd and 4th harmonics available for LIF and dual colour PIV • Low profile INVAR optical rail LPY 706-20PIV LPY 707-20PIV 20 300 20 400 30 200 15 325 15 425 <3 8 0.8 7-11 <70 5x107 <0.5 <3 9 ~3 7-11 <70 5x107 <0.5 <3 6.5 0.8 7-11 <70 5x107 <0.5 <3 8 0.8 7-11 <70 5x107 <0.5 <3 9 ~3 7-11 <70 5x107 <0.5 invar rail. This imparts both a large Services Voltage(1) (VAC) Frequency(2) (Hz) Power Water Temp Max. (˚C) Inlet Pressure (bar) Cooling degree of mechanical and thermal Power Supply stability to the system suiting (1) 110VAC option requires autotransformer to be specified on order. (2) 50 or 60Hz to be specified on order. them to use in both research (3) Ambient Temperature 5-35˚C. (0-80% non condensing atmosphere.) The LPY PIV series are based around a rugged, self supporting, LPY LPY 704-30PIV 706-15PIV LPY 707-15PIV 220-250 220-250 220-250 220-250 220-250 47-63 50 or 60 50 or 60 50 or 60 50 or 60 Single Phase Single Phase Single Phase Single Phase Single Phase 20 20 20 20 Air cooled(3) - <2 <2 <2 <2 Air Water Water Water Water 2 x LPU1000 16U Rack 16U Rack 16U Rack 16U Rack LPY LPY LPY LPY 704-100PIV 704-200PIV 742-100PIV 742-200PIV 100 200 100 200 100 50 200 100 <3 6.5 ~3 10-12 <70 108 <0.5 <3 4 ~3 10-12 <70 108 <0.5 <3 6.5 ~3 10-12 <70 108 <0.5 <3 6.5 ~3 10-12 <70 108 <0.5 220-250 220-250 220-250 220-250 50 or 60 50 or 60 50 or 60 50 or 60 Single Phase Single Phase Single Phase Single Phase 20 20 20 20 <2 <2 <2 <2 Water Water Water Water 16U Rack 16U Rack 2 x 16U rack 2 x 16U rack and industrial applications with little need for • Line narrowed versions maintenance. • Rugged industrial design 139 The LPY PIV series can have a stable or a stable - Rack-mount PSU PIV Laser head Unit 326 81 1100/1200/1300 * 163 Ô telescopic resonator design, with the intra-cavity telescope yielding a lower divergence output. 16/24U *Rail length will vary dependent on attenuator and future upgrade options. All LPY700 series systems feature a birefringence compensating twin-rod design 78 Remote Control Box to give the best possible beam 700 52.5 homogeneity, essential for the 145 605 LPU1000 PSU Ô formation of uniform light sheets. Ô 180 615 All dimensions shown in mm 68 502 238.5 H i g h Repetition Rate Lasers for H i g h S p eed I maging A pplic at io ns T h e L DY300 PIV Series Th e LDY P IV Series Specification s Performance Data LDY PIV FEATURES • High Energy at 527nm • 0-20kHz continuously variable • Field replaceable pump module • Dedicated PIV laser head LDY PIV Model • Rugged industrial design LDY302 PIV LDY303 PIV LDY303HE PIV The LDY300 series are diode pumped, dual cavity, The power supply and Repetition rate (each cavity) (kHz) 1-20 1-20 1-20 1-20 Q-switched Nd:YLF laser systems ideally suited closed-circuit chiller Output Energy at 1kHz at 527nm per laser head per pulse (mJ) 10 15 20 22.5 to high speed PIV imaging applications. Output are all housed in a energies of up to 30mJ at 1kHz per cavity at compact 10U or 12U 19” cabinet. The system 527nm are available. The lasers are built around a can be controlled either by the in-built LCD or via 1 5 <3 ~150 12, 7 1 5 <3 ~150 12, 7 1 5 <3 ~150 12, 7 1 5 <3 ~150 12, 7 220-250 50 or 60 Single Phase 5-30 1000 19” 10U Rack 220-250 50 or 60 Single Phase 5-30 1800 19” 12U Rack 220-250 50 or 60 Single Phase 5-30 2700 19” 13U Rack 220-250 50 or 60 Single Phase 5-30 2700 19” 13U Rack Pulse - pulse stability (±%) Beam diameter (mm) (4) Beam divergence (mrad) (5) Pulse width @ 1kHz (ns) M2x, M2y Services Voltage(1) (VAC) Frequency(2) (Hz) Power Ambient(3) (˚C) Consumption (W) Power Supply rugged self supporting invar rail that bestows • Low profile INVAR optical rail LDY301 PIV excellent mechanical and optical stability. (1) 110VAC option requires autotransformer to be specified on order (2) 50 or 60Hz to be specified on order. (3) 0-80% non condensing atmosphere (4) Beam diameter is achieved with output telescope. Standard diameters quoted. Other diameters are available on request. In all cases M2 is unchanged. (5) At specified beam diameter. (6) M2 values differ in the x and y directions. Beam rotation optics are available as an option to allow the thinnest light sheets to be formed in any plane. This, coupled with the proprietary resonator design, leads to excellent output beams that are spatially and RS232 interface using the supplied software suite temporally extremely smooth and or dll. The system can be externally triggered for stable, giving rise to light sheets that output frequencies from 0 - 20 kHz using the TTL offer almost identical shot to shot interface. illumination. PIV Laser Head 326 139 Rack-mount PSU 81 163 900/1100 605 (10U) 695 (12U) 740 (13U) The robust design of these lasers make them suitable for the harshest of industrial 700 environments and research applications alike. Remote Control Box 605 All dimensions shown in mm 52.5 145 Ô 180