Brewster angle dispersing prism for wavelength separation or GDD compensation; N-BK7, UV-grade fused silica, or Suprasil 1. A beam entering at the Brewster angle for a given design wavelength will also exit at the Brewster angle, nearly eliminating p-polarization losses in transmission.
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Isosceles Brewster prisms disperse a beam of light spectrally like an ordinary dispersing prism, but are often used for intracavity laser applications. Each ray is refracted twice as it passes through the prism, and how much two wavelengths are separated upon output will depend on the refractive of the prism material and the distance travelled through the prism. An isosceles Brewster prism is cut with so that a beam entering at the Brewster angle for a given design wavelength will also exit at the Brewster angle, nearly eliminating p-polarization losses in transmission. Wavelength separation will be less than in an equilateral prism due to shorter pathlength. Brewster prisms find use in femtosecond systems as group dispersion delay compensators, since the prism can be translated along its apex bisector to achieve adjustable pathlengh (and therefore dispersion) without altering the exit angle of the beam. • High-quality surface polish on two sides (AB) for use in high power applications • Extremely small loss for p-polarized beam • N-BK7, UV-grade fused silica, or Suprasil 1 with user-specified antireflection coatings • Custom dimensions, materials, and coatings available |