Brewster-cut

YLiF4 (YLF) 5% 135 165 9 1023 Brewster cut, f c, nonresonant cavity, external mirrors, attached GaAs/GalnP load (2 am thick, 800 am diameter) Seletskiy et al (201 Oc)... 

Solid-State Lasers. Sohd-state lasers (37) use glassy or crystalline host materials containing some active species. The term soHd-state as used in connection with lasers does not imply semiconductors rather it appHes to soHd materials containing impurity ions. The impurity ions are typically ions of the transition metals, such as chromium, or ions of the rare-earth series, such as neodymium (see Lanthanides). Most often, the soHd material is in the form of a cylindrical rod with the ends poHshed flat and parallel, but a variety of other forms have been used, including slabs and cylindrical rods with the ends cut at Brewster s angle. 

Optical multipass cells have been used for the enhancement of CW Raman scattering(4) however, these cells are typically not well-suited for use with high power, pulsed lasers. A new multipass cell for use with a pulsed Nd YAG laser is proposed whereby the 1.06 micron laser output is admitted into a multipass cell cavity where it is partially converted to 532nm with a Brewster s angle cut second harmonic generating crystal The 532nm pulse is trapped in the mirrored cavity while the 1.06 micron pulse is dumped. This multipass cell concept has been demonstrated with the experimental set-up shown in figure 1. 

For many cyclitols, a convenient, short-cut version of the Whiffen-Brewster calculations may be used, namely (1) consider the most stable chair conformation of the molecule, for which purpose, Dreiding stereomodels are helpful (2) then assume that each ee or ea —CHOH—CHOH— grouping contributes -t-45 if it is in the front-left conformation (149), and —45° if it is in the front-right conformation (143). Each diaxial —CHOH—CHOH— grouping, and each isolated asymmetric center, makes a contribution of zero. The sum of the numbers is then equal to the molecular rotation predicted (for water and the d line of sodium). 

The crystal for R110 dye (cut for a match angle of 68° at Brewster incidence) was used here at large tip angle. 

A less clear-cut demonstration of the nucleophilicity of [Pt(PPh3)2] comes from its reaction with optically active 8-(a-bromoethyl)quinoline, as shown in (20). The configuration of the product was deduced by Brewster s rules (Sokolov, 1976). However, prior coordination of the nitrogen atom to the metal could predefine the pathway. 

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