Brewster windows

Brewing water, ozonation of, 17 807-808 Brewster angle, 14 670 Brewster s law, 14 857 Brewster windows, 14 682, 687 Brezinaite, 6 471t... 

Brewster window A flat optical window tilted at an angle such that light whose electric vector is polarized parallel to the plane of the window is 100% transmitted. Light polarized perpendicular to the window is partially reflected. It is used on the ends of a laser to produce light whose electric field oscillates perpendicularly to the long axis of the laser. 

Fig. 22. Dependence of the acoustic signal of an intracavity cell with Brewster windows on the modulation frequency. In a long tube the lowest resonance is the lowest order longitudinal mode, which is excited to enhance the signal...

The basic design of the Ar/JCr ion laser is conceptually similar to that of the HeNe (or other gas) lasers, i.e. a plasma discharge tube contains the active medium with Brewster windows and the resonator constitutes a typical two-mirror configuration. However, unlike HeNe lasers, the energy level transitions that contribute to laser action come from ions of argon or krypton, rather than neutral atoms. The argon or krypton gas is held at a pressure of 1.5 mbar. 

Fig. 5.18a,b. Optical diode consisting of a Faraday rotator, a birefringent crystal, and Brewster windows. Tilting of the polarization vector for the forward (a) and backward (b) directions... 

Figure 11 Principal components used to optimize the performance of a laser. The prism selects a particular atomic line and the wavelength of operation. The etalon selects a longitudinal mode and increases the laser s coherence. Reducing the aperture diameter favours the Gaussian spatial mode. The Brewster windows polarize the beam linearly.

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