Method of realizing bidirectional optical diode and device of realizing bidirectional optical diode

Abstract

The present invention provides a method of realizing a bidirectional optical diode and a device of realizing the bidirectional optical diode. The scheme of the present invention is that: two beams of coupling fields which are irradiated oppositely and possess a certain frequency detuning are acted on a thermokalite metal atom steam chest, so that an atomic medium generates the periodic modulation to a refractive index of the probe light, the transmission characteristic of the bidirectional incident probe light is operated and controlled effectively, and a bidirectional optical diode function possessing certain frequency interval and frequency width is realized. A frequency interval depends on the frequency detuning difference between the bidirectional coupling fields, and a frequency width depends on a Doppler effect caused by the random motion of hot atoms. Meanwhile, a pair of coherent pumping fields are introduced, the bidirectional transmission efficiency of an optical diode can be improved effectively, and an isolation ratio is not influenced. The device involved in the present invention is easy to miniaturize and integrate, can form a practical light quantum device, and can be widely used in the research fields, such as the multichannel quantum state storage, the quantum information storage, such as an tunable all-optical control optical switch, an optical reflector, etc., the quantum relay network, etc.

Description

technical field [0001] The invention relates to the technical field of quantum optics and the interaction between light and matter. Specifically, two coupled laser beams with the same polarization and fixed frequency detuning act on the alkali metal atom vapor chamber to make the atomic medium opposite to the incident probe. The refractive index of light produces periodic absorption modulation, so that the transmission characteristics of light incident on the probe can be effectively controlled, thereby realizing the method and device for the function of a bidirectional optical diode. Background technique [0002] Optical diode is a passive device with unidirectional conductivity, that is, it only allows light in one direction to pass through without affecting its transmission characteristics. It is widely used in optical isolation technology and all-optical control in the field of laser technology and quantum optics. process. At present, there are two main ways to realize ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem that the traditional function of using gyromagnetic medium or photonic crystal material to generate optical isolation only allows light to propagate along a certain fixed direction and it is difficult to achieve continuous frequency tuning and all-optical tuning control, the present invention uses two beams Interaction of a coupled field with a certain frequency detuning and an alkali metal atom vapor chamber, providing a method and device for realizing a bidirectional optical diode

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