FIR (TeraHertz) series Optically Pumped Far Infrared Lasers from Edinburgh Instruments

A choice of FIR lasers from Edinburgh Instruments to meet applications requiring coherent radiation in the range of 40 microns to 1.22 mm (0.25 to 7.5 THz). Invar bar stabilised

295 FIR : single output, 150mW output (using a pump CO₂ laser such as PL5), 500mW (using a pump source as PL6) at 118.8 and 184.3 microns, isotopic fills

395 FIR : Dual FIR output ; utilises single pump CO₂ source (e.g. PL5, PL5-S, PL6)
 

FIRL 100 : Has both the pump CO₂ source and FIR laser housed in an integrated structure ; FIR output at 118.8 micron is guaranteed at 150mW. The lasers and coupling optics are mounted within a 5 bar invar rod frame for excellent thermal and mechanical stability. The CO₂ section provides 80 lines between 9.1 and 10.9 microns and features a flowing gas single discharge tube giving more than 50w on the strongest lines. Mode performance is (M² < 1.25) is assured by internal profiling of the tube and the use of highest quality optics. The resonator design is based on the proven PL5 laser with diffraction grating, two ZnSe Brewster windows and peizo ceramic mounted ZnSe output coupler.

The FIRL 100 Far Infra Red laser gas a 1.5m long pyrex waveguide of 36mm diameter. The pump beam is input via a Brewster window and input coupling with central aperture. FIR  radiation is extracted via a unique, customised dichroic output mirror with wideband transmission.