Optical beamsplitter

cubicnon-polarizing

Non-Polarizing Beamsplitter (NPBS) cube's main function of it is to split laser beam (single or broad wavelength range) while keeping the polarization state intact. How Non-Polarizing Beamsplitter (NPBS) Cubes work? Once incoming beam reaches Alien Photonics NPBS cube’s hypotenuse it is split into two beams according to the designed split ratio. One beam is transmitted through the cube and other is reflected at 90° angle (perpendicular to the incoming beam). Polarization state of both beams remains the same. How Non-Polarizing Beamsplitter (NPBS) Cubes are manufactured? Similarly to Standard PBS, High Energy PBS and Broad Band PBS cubes, Alien Photonics NPBS cube manufacturing begins from polishing two right angle prisms. Once coating design is ready, one of the prisms is coated with non-polarizing beamsplitter coating on hypotenuse. Enter and exit surfaces are then coated with Anti-reflective coating. Next step is assembling the prisms, which is usually done using cement (epoxy glue). Final step – NPBS cubes are inspected and stocked or shipped to the customer. Alternatives to NPBS Cubes NPBS cubes are quite similar to several Alien Photonics products. First of all – non-polarizing TFP beamsplitter. This optical component has the same function, with main differences: shape, lack of cement (glue) and incidence angle. Partial reflectors also separate the light; however, they are usually designed to work at normal angle and not optimized to keep polarization state and used mostly in laser cavity with high reflection mirrors (single-band, dual-band or brodband) .