Overview: Brewster Prism is one kind of Dispersing Prism. They are designed to have an apex
angle such that a p-polarized ray incident at Brewster’s angle will
pass through the prism parallel to the base at minimum deviation,
and exit also at Brewster’s angle. In this case surface reflection
losses are negligible. Brewster Prisms are often used in situations
where surface reflection losses cannot be tolerated. Dispersing prisms are essential parts in most of ultrashort pulse
laser systems. These prisms are used intracavity to compensate for
dispersion of fixed cavity optics, such as active gain medium. But
in most of cases they are used as extra-cavity elements to
manipulate pulse characteristics. Brewster Prisms are also frequently used to select a single
wavelength from a multi-wavelength laser. Tuning is accomplished by
tilting the prism. These prisms have very low surface reflection
losses over the range 190-425 nm and are usable from 190-2500 nm. General Specifications of Brewster Angle Dispersing Prism: | Material | BK7, UV grade Fused Silica, SF11 | | | Dimension Tolerance | ±0.2mm | | Flatness | λ/4@632.8nm per 25mm | | Angle Tolerance | <5 arc minutes | | Polished Surface | Two side surfaces polished base fine ground | | Surface Quality | 60/40scratch and dig | | Clear Aperture | >90% | | Chamfer | Protective<0.5mm@45° | | Coating | No coating, available |
Standard Products of Brewster Angle Dispersing Prism: | PN. | Material | A (mm) | L (mm) | α(°) | Wavelength (nm) | | BRP1212-67-800 | N-BK7 | 12.7 | 12.7 | 67 | 800 | | BRP2525-67-800 | N-BK7 | 25.4 | 25.4 | 67 | 800 | | BRP1212-69-800 | UVFS | 12.7 | 12.7 | 69.1 | 800 | | BRP2525-69-800 | UVFS | 25.4 | 25.4 | 69.1 | 800 | | BRP1212-59-800 | SF11 | 12.7 | 12.7 | 59 | 800 | | BRP2525-59-800 | SF11 | 25.4 | 25.4 | 59 | 800 |
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