Scientific and industrial applications
UV Raman spectroscopy light source
Capillary electrophoresis (CE)
Detection of defects on semiconductor wafers
Semiconductor surface Raman spectroscopy
Protein spectroscopy
Interferometric optics testing
The Lexel 85-SHG gas-ion laser provides continuous-wave deep ultraviolet coherent laser light with up to 90mW output. (If you need even more deep UV power, the larger 95-SHG is available.) The 85-SHG is the first continuous-wave deep UV laser designed specifically for spectroscopic applications. Features include:
Small Size l Integrate deep UV easily into existing instrument configurations
l Lab-to-lab portability
Utility Friendly l Bring deep UV to virtually any lab
l Single phase 220 V power
l Cool with compact 4 kW chiller
Fundamental Stability Control l Spend time on your experiment, not on your laser
l Fast daily warm-up
l Hands-off deep UV power stability
l Ultra-stable deep UV beam pointing
Spectrum Isolation l Ensure any nearby laser lines are suppressed for improved Raman SNR
Excellent Deep UV Beam Profile l Focus easily to small spot with minimal pinhole loss
Versatility l Choose from multiple deep UV and visible lines
The 85-SHG laser is based on the proven Lexel 85 series. It is an intracavity frequency-doubled system equipped with a nonlinear BBO crystal, to produce Second Harmonic Generation (SHG) deep UV coherent laser light. It uses the simplest, most stable three-mirror folded cavity design for frequency doubling. This provides two benefits:
True hands-free laser operation in the ultraviolet.
A high-quality TEM00 beam that\'s suitable even for highly mode-sensitive applications.
The 85-SHG is designed for long, stable life in a variety of scientific and industrial applications needing coherent deep UV laser light.
Scientific and industrial applications |
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The BBO crystal (Beta Barium Borate: BaB2O4) is mounted on either a Manual Micrometer Stage or an optional Crystal Automatic Transition (CAT) Stage. The CAT stage provides true hands-free operation for industrial applications, by eliminating the need for BBO crystal tune-up.
A continuous supply of dry nitrogen is required when the system is operating.
Custom laser wavelengths, other than the standard ones shown below, are available. Contact Cambridge Lasers with your requirements.
LEXEL 85-SHG WAVELENGTH AND POWER | |||
| Visible wavelength1 | Output power, mW | SHG wavelength2 | Output power, mW |
| 528.7 nm | 130 | 264 nm | Inquire |
| 514.5 nm | 400 | 257 nm | 50 |
| 501.7 nm | 45 | n/a | n/a |
| 496.5 nm | 100 | 248 nm | 10 |
| 488.0 nm | 350 | 244 nm | 25 |
| 476.5 nm | 100 | n/a | n/a |
| 457.9 nm | 45 | 229 nm | Inquire |
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1 Single line operation. Some wavelengths require special optics. 2 One SHG wavelength per BBO crystal. | |||
LEXEL 85-SHG BEAM PARAMETERS | ||
| 514nm wavelength | 257nm wavelength | |
| Mode | TEM00 | TEM00 |
| Beam diameter3 | ≤ 1.1 mm | 1.0 x 1.2 mm |
| Beam divergence (full angle) | ≤ 0.7 mrad | .6 x .6 mrad |
| Beam polarizationClick here for polarization drawing 1 and drawing 2 | Horizontal | Vertical |
| Power stability4 (light control) | ±0.2% | ±1.0 % |
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3 Beam diameter measured at the front of output coupler 4 After 15 minute warm-up | ||
LEXEL 85-SHG OPERATIONAL AND DIMENSIONAL | |
| Electrical service requirements |
220VAC, single phase 35A, 50/60 Hz |
| Cooling water flow |
1.5 gpm at 15-70 psi (5.6 liter/min at 1.0-4.9 Kg/cm2) |
| Cooling water source | Filtered tap water |
| Incoming water temperature |
50-90° F (10-35° C) Non-condensing environment |
| N2 flow rate | 0.5-1.0 liter/min; 0.3 - 0.5 psi |
| Laser head, L x W x HClick here for dimensional drawing |
41.5 x 7.2 x 6.1 inches (105.4 x 18.3 x 15.5 cm) |
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Power supply, depth x W x H |
18.4 x 16.6 x 8.0 inches (46.7 x 42.2 x 20.3 inches) |
| Laser head, weight |
Uncrated: 62 lbs (28 kg) Crated: 103 lbs (47 kg) |
| Power supply, weight |
Uncrated: 82 lbs (37 kg) Crated: 104 lbs (47 kg) |
Specifications as of 2/2004. Subject to change without notice. | |
The Lexel 85-SHG laser is CDRH-certified with all safety features. It comes with a two-year/2,000 hour warranty on the system (excluding the BBO crystal). The BBO crystal for a CAT stage is warranted for 1 year or 1000 hours, whichever comes first; for a manual stage crystal, the warranty is 90 days.
Power supply
The power supply front panel contains all controls necessary to operate and fully monitor the laser system.
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Laser head
Within the laser head, an ultra-stable solid Invar® optical resonator holds the plasma tube and mirrors in precise alignment to produce deep UV coherent laser light.
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Laser tube
A simple and reliable plasma tube design. Lexel\'s solid ceramic plasma tube design has been proven since 1972, while other ion laser manufacturers have tried and abandoned several designs in an attempt to match Lexel\'s stability and performance. In fact, a majority of the more than 18,000 Lexel plasma tubes still operate today, some with 20,000 hours use.
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Current and light regulationThe Lexel 85-SHG laser can be operated in current or UV light control:
n Current regulation allows direct control of the current through the plasma tube via an external source.
n UV light regulation provides the ultimate in deep UV laser output stabilization. A small portion of the deep UV light is sampled within the laser and compared to a reference signal in a differential circuit that automatically adjust the laser current to maintain a constant output.
This feature also allows for the deep UV light level to be modulated externally with a ± 10 volt signal.
Fine tuning
The laser is aligned accurately with the use of fine tuning knobs.
Remote turn on This feature permits the laser power supply to be turned on and off and the plasma tube to be started remotely.
Automatic startingThis circuit automatically starts the plasma tube approximately 20 seconds after the power supply is turned on.
Panel-mounted power meterThis multirange power meter continuously displays the output power of the laser.
Resonator Cavity Stabilization System
Spectrum isolation for enhanced Raman SNR
UV fiber delivery
Crystal Automatic Translation (CAT)
Model 503-S Temperature Controlled Etalon Assembly
The extremely stable 503-S etalon assembly allows single longitudinal mode operation, for applications requiring long coherence length and very narrow line width. The output power is typically in the range of 50% of the original output.
Initial Installation and Hands-On Training
One-day on-site installation and hands-on training for 85-SHG series within the U.S. and Canada.
