“Pockels cell”的概念、定义、翻译、参考文献-科学参考

Pockels cell

Astronomy

A device used to change the nature of polarized light for analysis. It consists of a crystal made from a combination of potassium, hydrogen, dideuterium, and phosphorus with a fine grid of gold electrodes on its surface. Depending on the voltage applied to the electrodes, light polarized in one direction can be arranged to emerge from the device 90° or 180° out of phase with the light polarized at right angles to it. The Pockels cell then acts as a quarter-wave plate or a half-wave plate respectively (see wave plate). It is named after the German physicist Friedrich Karl Alwin Pockels (1865–1913). Pockels cells are used in some polarimeters and spectropolarimeters.

Chemistry

An electro-optical device used to produce population inversion in lasers and a pulse of radiation. In a Pockels cell, crystals of ammonium dihydrogenphosphate are used to convert plane-polarized light to circularly polarized light when a potential difference is applied. A Pockels cell can be made part of a laser cavity. When this happens, a change of polarization occurs when light is reflected from a mirror and the light that is polarized in one plane is converted into light polarized in the perpendicular plane. The effect is that the reflected light does not stimulate emission. When the Pockels cell is turned off the polarization does not occur and the energy in the cavity can be released in the form of a pulse of stimulated radiation. The Pockels cell is named after Friedrich Carl Alwin Pockels (1865–1913), who reported this type of cell in 1893 in the course of his investigations of electro-optics. See also laser.

单词	Pockels cell
释义	Pockels cell Astronomy A device used to change the nature of polarized light for analysis. It consists of a crystal made from a combination of potassium, hydrogen, dideuterium, and phosphorus with a fine grid of gold electrodes on its surface. Depending on the voltage applied to the electrodes, light polarized in one direction can be arranged to emerge from the device 90° or 180° out of phase with the light polarized at right angles to it. The Pockels cell then acts as a quarter-wave plate or a half-wave plate respectively (see wave plate). It is named after the German physicist Friedrich Karl Alwin Pockels (1865–1913). Pockels cells are used in some polarimeters and spectropolarimeters. Chemistry An electro-optical device used to produce population inversion in lasers and a pulse of radiation. In a Pockels cell, crystals of ammonium dihydrogenphosphate are used to convert plane-polarized light to circularly polarized light when a potential difference is applied. A Pockels cell can be made part of a laser cavity. When this happens, a change of polarization occurs when light is reflected from a mirror and the light that is polarized in one plane is converted into light polarized in the perpendicular plane. The effect is that the reflected light does not stimulate emission. When the Pockels cell is turned off the polarization does not occur and the energy in the cavity can be released in the form of a pulse of stimulated radiation. The Pockels cell is named after Friedrich Carl Alwin Pockels (1865–1913), who reported this type of cell in 1893 in the course of his investigations of electro-optics. See also laser.
随便看	oxygen ‘burning’ oxyhaemoglobin oxyhornblende oxyhydrochlorination process oxyluminescence oxyntic cell oxytocin Oyashio current ozonation ozone ozone hole ozone layer ozonesonde ozonides ozonolysis O’Brien, Smith O’Connell, Daniel (1775–1847) O’Connor, Feargus Edward (1794–1855) O’Higgins, Bernardo (c.1778–1842) P p p21 P2P p53 PA