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Raman Convertor
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Raman Convertor
The Light Age 101 PAL-RCs are a family of state-of-the-art, compact, high pressure Raman Convertors capable of extending the tuning range of Light Age PAL™ tunable lasers in the UV, VIS and IR. They also extend the wavelength range of pulsed Dye lasers, Excimer lasers, Nd:YAG lasers, Ruby lasers, Ti:Sapphire lasers, and OPO's. A unique gas recirculation system minimizes thermo-optic effects, permitting operation at power levels unachievable in any other commercial Raman Shifter.
REVITALIZE YOUR OLD LASER with NEW WAVELENGTH CAPABILITY!!
Frequency conversion is effected by the stimulated Raman process in gaseous media. Q-switched laser pulses are focused into the high pressure gas sample and then recollimated by an integral lens system. Output consists of the incident wave number, vo and the Stokes and anti-Stokes laser lines at vo ± nvM where vM corresponds to the frequency of a Raman-active vibration of the scattering molecule and n takes integral values 1, 2, 3, ...etc. Stokes output laser radiation at longer wavelengths than the incident beam is recollimated and emitted essentially along the laser beam direction. Anti-Stokes lines at higher frequency are emitted colinearly or along specific directions which are determined by conservation of momentum. When used with a tunable laser pump source such as Alexandrite lasers, dye lasers, OPO's, and Ti:Sapphire lasers, all Raman lines tune in frequency with the pump. No adjustments of the Raman Convertor are required during laser tuning.
During the stimulated Raman process, an appreciable amount of energy is dumped into the gas. As heat builds up locally in high power operation thermo-optic refractive index distortions degrade laser beam quality and reduce conversion efficiency. The LAI 101 PAL-RC Raman Convertor recirculation system mitigates these effects.
Achieving ultimate performance for Raman conversion efficiency requires optimization of gas, pressure, cell length and focal geometry. The LAI 101 PAL-RC Raman Convertor permits quick and easy modification of these parameters. The engineering staff at Light Age stands ready to offer their years of laser experience in assisting you to rapidly locate the optimum conditions for matching the Raman Convertor to your specific UV laser, visible laser, or infrared laser needs.
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Compatible with UV lasers, visible lasers, and Infrared lasers
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Generates VUV laser output (<180-250 nm) by antistokes shifting
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Compatible with Alexandrite lasers, Dye lasers, Excimer lasers, Nd:YAG lasers, Ruby lasers, Ti:Sapphire lasers, and OPO's
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Generates eyesafe 1.5 µm laser radiation from pulsed Nd:YAG pump lasers
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Integrated focusing and recollimating optics for effortless laser alignment
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Efficient wavelength conversion at high average power
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Can be used with:
H2(4155 cm-1)
D2(2991 cm-1)
N2(2331 cm-1)
CH4(2914 cm-1) -
Exclusive Internal Gas Recirculation System provides improved laser beam quality, even for > 50 W output powers
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0.3 m, 0.5 m, and 1.0 m Raman Convertor lengths standard
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Compact and convenient...max. diameter only 3 inches
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Stainless steel construction for long term reliability
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Highest pressure range commercially available:
15,000 psi body
4,000 psi safety relief
2,500 psi rating -
Extremely rugged...Flight tested
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Simple, rapid gas changes...No vacuum pump required
- Raman Convertor Disassembly Kit and Fill Kit with Pressure Gauge are optional accessories
- Data and references for most pulsed lasers available upon request
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