The Lexel 95-SHG gas-ion laser provides continuous-wave deep ultraviolet coherent laser light with up to 250mW output. (For lower power output in a more compact laser, see our 85-SHG model.) The 95-SHG laser is based on the proven Lexel 95 series. The 95-SHG 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.
   

Deep UV Applications

The 95-SHG is designed for long, stable life in a variety of scientific and industrial applications needing coherent deep UV laser light.

Scientific applications		Industrial applications
Optical Fiber Bragg Grating (FBG) Resonance Raman spectroscopy light source Microscopy light source Capillary electrophoresis (CE) Protein science (protein folding, protein secondary structure)		Interferometric optic testing Semiconductor photolithography Semiconductor reticle inspection Semiconductor wafer testing Semiconductor surface Raman spectroscopy

Specifications

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.

 
Power supply, head and tube

The Lexel 95-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.

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.

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.

Standard features

Current and light regulationThe Lexel 95-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 UV laser output stabilization. A small portion of the 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 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.
 

Optional features

Resonator Cavity Stabilization System

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 95-SHG series within the U.S. and Canada.

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