10 Jan 2011 Thin film polarisers on glass substrates are ideal for use with high power densities. LASER COMPONENTS has developed 4 types to suit a wide range of requirements.
Our standard thin film polarisers are based on the Brewster angle of 56˚. The TFP coating is only needed on the front face as this achieves a good extinction ratio, because of this a rear side AR coating is not required.
Adjustment-free thin film polarisers have the added benefit of being able to be used at any angle from 53˚ to 59˚, made possible due to a broadband monitoring technique used in the coating process. Wavelengths are available from 450-1064nm and are manufactured using our Ion Assisted Deposition (IAD) technique. This gives the benefit of a high reflection of s-polarised light while simultaneously giving a high transmission of p-polarised light.
For applications requiring an alternative angle of incidence the 45˚ thin film polariser is a good and often inexpensive system to set up, as the s-polarisation is deflected by 90˚, thus a standard mount for bending mirrors can be used. The rear surface is AR coated for the p-polarisation.
For broadband systems such as Ti:sapphire fs lasers the broadband plate polariser is the ideal solution. These are used at an angle of 72˚ and can be used in both directions. It is important to note, however, that the p-polarisation is slightly offset and the s-polarisation is deflected at an angle of 144˚.
The substrates for all of these thin film polarisers can be chosen from our wide selection of standard windows or a custom solution to suit your specific requirements.
For more information visit our website at:
Thin Film Polarizers |
