Alkali metal vapor laser light source for laser interferometer gravitational wave detector

Abstract

The invention belongs to the technical field of universe observation and laser, and particularly to an alkali metal vapor laser light source for a gravitational wave detector of a laser interferometer. The light source includes a semiconductor pump source, a first convex lens, a first dichroic mirror, an alkali metal steam pool, an etalon, a first concave lens, a second convex lens, a diaphragm, aphase plate, a second concave lens, a second dichroic mirror, a light barrier, a third concave lens, a plane mirror, a polarization splitting prism, a CCD, a third convex lens, a wavelength meter, afirst proportional differential integral control unit, first annular piezoelectric ceramic, a second proportional differential integral control unit, a first temperature controller, a third proportional differential integral control unit, second annular piezoelectric ceramic and a second temperature controller are included. The alkali metal vapor laser light source has the advantages that the high-precision and high-power requirements of the gravitational wave detector light source of the laser interferometer can be met more easily; strong thermal noise caused by high power is effectively suppressed, and necessary conditions are provided for realization of a gravitational wave detector of a third-generation laser interferometer.

Description

technical field [0001] The invention belongs to the field of cosmic observation and laser technology, and relates to an alkali metal vapor laser light source, in particular to a single-frequency single high-order mode alkali metal vapor laser light source for a laser interferometer gravitational wave detector. Background technique [0002] Gravitational waves are an important prediction of Einstein's general theory of relativity, and the detection of gravitational waves is one of the most important frontier fields in contemporary physics. The intensity of gravitational waves is very weak, and the length change caused by gravitational waves is only 10 -19 m order, it is extremely difficult to measure such a tiny length. Many early attempts were unsuccessful. [0003] In 1963, former Soviet scientists Senstein and Pustovait first proposed the use of interferometers to detect gravitational waves. In 1971, Professor Weiss of the Massachusetts Institute of Technology also indep...

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