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The PL series of continuous wave (CW), grating tuned, infrared gas lasers sets the standard for high power, stable sources for a wide variety of applications from molecular spectroscopy, non-linear optics, interferometry, process control, atmospheric studies, plasma density measurements and much, much more.
The infra-red has long been dubbed the “Cinderella” spectral region due to the low level of blackbody emission at long wavelengths but this was changed with the development of carbon dioxide (CO2) and carbon monoxide (CO) lasers in the 1970’s.
In the same way that every individual can be identified by their unique fingerprint so the infra-red spectrum of a sample uniquely defines the constituent molecules present.
The PL-series of lasers include grating tuned CO2 lasers with a step tunable wavelength from 9-11μm with single line powers from a few Watts (Model PL2), to 50W (Model PL5) and even to 180W (Model PL6) each characterised by excellent amplitude and frequency stability for the most technically challenging tasks.
The PL2 laser lends itself to flexible tailoring to scientific applications, for example, if used with our 184T pump station you can fill the laser head with your own isotopic gas mix to which in turn allows you to access alternative wavelengths.
Our PL3 model is unprecedented in today’s markets. The laser operates as either a CO2 (output power up to 25W) or CO (with output >1W over the range 5.1 – 6.0μm) laser. Using different isotopic gas fills the PL3 laser can give up to 1000 lines across the infra-red.
The higher power PL-series lasers can be used to optically pump polar gases (for example methanol, formic acid etc) to create Far Infra Red (FIR) emission. Fusion reactor plasma temperature measurements in the far infrared or TeraHertz region (40μm – 1.2mm, 7.5 to 0.25THz) with applications in homelａnd security and scanning, scattering density measurements, radar modelling etc.
Download the PL Series Technical Specification
All PL series lasers utilise an invar rod frame to support the laser resonator and ensure a high degree of passive stability. This mechanically rigid frame minimises the effect of vibration on the laser output and provides thermal stability of the cavity length.
All lasers have manually controlled diffraction gratings for line selection and piezo mounted output couplers for the fine control of cavity length.
All laser tubes are water cooled for highest stability. The inner walls of the tubes are specially profiled to suppress off axis oscillations and to ensure that the lowest order transverse mode dominates. The low gas pressure (ca 30 mbar) and hence narrow gain profile supports predominantly only single longitudinal mode (SLM) operation.
The high optical mode quality and excellent amplitude and frequency stability make the PL lasers ideal sources for a wide number of scientific applications.
Each PL series laser is driven by one of the LPS family of new, compact (19" rack mounted) switch mode, high voltage power supplies. These supplies are based on resonant inverter technology for the highest efficiency and reliability. Designed for stable output current operation, the jitter of the PL lasers with the LPS range has been measured at typically 200kHz/sec.
Continuous wave or chopped operation up to 1kHz is available with the LPS range. The PL5 laser can be optionally driven with the versatile PS4P valve controlled power supply providing programmable cw, chopped and pulsed operation. In pulsed mode the laser peak output power is typically five times the cw level at repetition rates up to 1kHz and with pulse widths down to 100 microseconds.
A full range of accessories and options, such as vacuum pumps, thermocirculators, gas handling systems, stabilisers, etc. are available for each laser.
Edinburgh Instruments have a history in infra-red lasers which stretches back to their invention some 40 years ago, so purchase with confidence from the experts with a pedigree of expertise.
