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

An optical diode and laser technology, applied in the direction of the device for controlling the output parameters of the laser, can solve the problems of difficult continuous tuning and all-optical tuning control, etc., and achieve the effect of easy miniaturization and integration, avoiding polarization rotation, and simple and compact structure

CN104882783AActive Publication Date: 2015-09-02北京瓦科光电科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-09-02

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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.
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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 ...

Examples

Embodiment Construction

[0025] A method for realizing a bidirectional optical diode, comprising the following steps: (a), acting on two beams of oppositely incident coupling fields with a certain frequency detuning in a hot alkali metal atomic medium, so that the atomic medium is opposite to the The refractive index of light is periodically modulated, forming a detuned standing wave model; (b), two probe fields with the same frequency are passed through the thermal atomic medium, and the frequency of the probe field is near the two-photon resonance center. When the forward incident probe field can pass through the hot atomic medium, the backward incident probe field is just completely absorbed by the hot atomic medium, and vice versa, so that the transmission characteristics of the bidirectionally incident probe light can be effectively controlled, and a unique Bidirectional optical diode functions with a certain frequency interval and frequency width; the frequency interval depends on the difference ...