A Hermitian-Gaussian mode beam splitter

Abstract

The invention relates to a Hermite-Gaussian mode beam splitter. The Hermite-Gaussian mode beam splitter comprises a phase converter and an interference device; the phase converter is added to the interference device; the interference device splits a light beam into a light beam A and a light beam B; the light beam A passes through the phase converter, and the light beam B does not pass through thephase converter; and the two light beams are combined again at the exits of the interference device. Phase values introduced by the phase converter and the arrangement mode of the phase converter arechanged, so that different phase differences are correspondingly generated at the two exits, and are related to a Hermite-Gaussian mode horizontal parameter m or vertical parameter n; a finally-inputted mode emerges at different exits, and therefore, Hermite-Gaussian mode beam splitting is realized. The Hermite-Gaussian mode beam splitter of the invention is based on two feature parameters, namely, the Hermite-Gaussian mode horizontal parameter and vertical parameter, any mode conversion does not occur, and the beam is split under a mode undamaged condition; a whole process does not involve diffraction, and the light directly transmits through the device, or is reflected, and therefore, the Hermite-Gaussian mode beam splitter can be considered as a general transmissive or reflective opticdevice.

Description

technical field

[0001] The invention belongs to the field of optical technology, and relates to a high-order laser transverse mode beam splitter, in particular to a Hermitian-Gaussian mode beam splitter. Background technique

[0002] The Hermitian-Gaussian mode and the Laguerre-Gauerian mode are two commonly used laser transverse modes. Beam splitters are devices used to separate laser modes into different spatial locations. At present, the Laguerre-Gaussian mode beam splitter technology is relatively mature, but the realization of the Hermite-Gaussian mode beam splitter is relatively difficult. The existing Hermite-Gaussian mode beam splitter scheme is to convert the mode into Laguerre-Gaussian light first, and then combine the existing Laguerre-Gaussian mode beam splitter to realize the beam splitting of the Hermite-Gaussian mode . This kind of beam splitter is not a device directly applicable to Hermitian-Gaussian beams, so the structure is relatively complicated. So ...

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