Since their invention over 50 years ago, lasers have made a profound impact upon and underpin a range of technology in numerous sectors ranging from medicine, through communications and manufacturing to retail and entertainment. The light produced by a laser is spatially coherent, typically has a very low divergence beam and can have a very narrow wavelength range. Despite the diversity of the technology the wavelengths covered by lasers on the market is limited. Three major wavelengths are covered by Nd based lasers (~1030nm, 1064nm), Ti:Sapphire lasers (~800nm) and Er-doped fibre lasers (1554nm). At the UV end of the spectrum (192nm) there are Excimer lasers and at the other end in the mid-IR there are CO₂ lasers (10μm). Other regions are covered by non-diode and diode lasers, and additional wavelengths are also covered by frequency conversion using doubling crystals. Frequency conversion using crystals has limitations in the wavelengths that can be achieved. One region of the spectrum that is poorly covered is the mid-IR (2-25μm). The majority of gases exhibit strong spectral signatures in this region and hence it is important in environmental, chemical and biomedical applications. Another region which exhibits discrete number of wavelength gaps is the visible and near UV (300-700nm). Coverage of this region is important for biomedical technologies such as flow cytometry, DNA sequencing, forensics and bio-agent detection. These applications require well defined laser wavelengths (for example yellow). Finally the UV region (less than 200nm) which is required in semiconductor and material processing is hindered due to cumbersome and expensive existing lasers. GLO technology allows laser emission at unconventional wavelengths, including UV or mid-IR by simply pumping its PMC filled with a Raman gas. GLO technology based frequency convertor combines compactness, high conversion efficiency and high power levels, and can emit several spectral lines at once. Please contact us if you have a need for a specific laser wavelength.
On the right you will find some representative literature on "Laser frequency conversion" topics.