Double-pavement light source light intensity magnetic control tuner
The dual-path light source intensity magnetotuner, utilizing the magneto-optical effect of magnetohydrodynamics, solves the problems of slow response speed and mechanical wear of traditional optical tuners by controlling the arrangement of magnetic nanoparticles with a two-dimensional magnetic field. It achieves fast, low-power optical path tuning and is suitable for optical communication and industrial sensing systems.
Patent Information
- Application Number
- CN202511041736.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-28
- Publication Date
- 2025-11-14
AI Technical Summary
Traditional mechanical optical tuners are slow in response, large in size and prone to wear, MEMS tuners have fatigue life and vibration sensitivity issues, while electro-optic and thermo-optic tuners have high power consumption and large temperature drift, which limits the development of optical communication and optical sensing systems.
Employing the magneto-optical effect based on magnetofluid, the arrangement of magnetic nanoparticles in the magnetofluid is controlled by a two-dimensional magnetic field to achieve independent on/off control of dual optical paths. A composite magnetic field structure with an orthogonal symmetrical layout is formed by electromagnet group one and electromagnet group two to control the transmittance of the beam and achieve optical path tuning.
It achieves fast optical path response, no mechanical wear, low power consumption and high integration optical path tuning, and is suitable for fields such as space optical communication and industrial sensing.
Smart Images
Figure CN120949470A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of optical intensity magnetic control tuning technology, specifically a dual-path light source optical intensity magnetic control tuner. Background Technology
[0002] As a key component in optical communication and optical sensing systems, magnetically controlled tuners have undergone a technological evolution from mechanical to non-mechanical designs. Traditional mechanical optical tuners achieve optical path adjustment by physically moving optical elements. While simple in structure, they suffer from slow response speeds (milliseconds), large size, and mechanical wear. Microelectromechanical systems (MEMS)-based tuners have improved response speeds to the microsecond level, but are still limited by the fatigue life and vibration sensitivity of the mechanical structure. Recent developments in electro-optic and thermo-optic tuning technologies, while achieving nanosecond-level responses, face technical bottlenecks such as high power consumption and large temperature drift.
[0003] Against this backdrop, magnetohydrodynamic (MHD)-based optical intensity magnetotuning technology has emerged. This technology utilizes the tunable alignment characteristics of magnetic nanoparticles (such as Fe3O4) under an applied magnetic field. When no magnetic field is applied, the magnetic nanoparticles in the MHD are randomly and uniformly distributed; after a magnetic field is applied, the particles are reoriented and aligned along the magnetic field direction by the Lorentz force, forming a chain-like structure. Non-mechanical tuning of the optical path is achieved by changing the magnetic field. Its core working principle is to control the propagation path of the optical signal by altering the effect of the MHD material on polarized light through an applied magnetic field. Magnetotuners, with their significant advantages such as non-mechanical operation, fast response, reversible magnetic particle alignment without mechanical wear, long service life, compact structure, and ease of integration, show promising application prospects in fields such as space optical communication, industrial sensing, and special optical systems.
[0004] This invention discloses a dual-path light source intensity magnetotuner, based on the magneto-optical anisotropy effect of magnetofluids, precisely controlling the spatial alignment of nano-magnetic particles (such as Fe3O4) in the magnetofluid through a two-dimensional magnetic field. By adjusting electromagnet group one and electromagnet group two, the transmission state of the two optical channels can be controlled separately, realizing independent tuning of the two-dimensional optical path. This dual-path light source intensity magnetotuner has advantages such as simple operation, fast response speed, and high integration, showing broad application prospects. Summary of the Invention
[0005] The purpose of this invention is to provide a dual-path light source intensity magnetically controlled tuner. Utilizing the magneto-optical effect of magnetofluids, independent on / off control of the two optical paths is achieved. This dual-path light source intensity magnetically controlled tuner includes an electromagnet group one (1), an electromagnet group two (2), a two-dimensional magnetofluid cavity (3), an X-axis light source (4), an X-axis light intensity decision device (5), a Y-axis light source (6), and a Y-axis light intensity decision device (7). By adjusting the magnetic field strength of electromagnet group one and electromagnet group two, the light intensity transmittance of the light beam transmitted along the magnetic field direction is controlled. When the transmitted light intensity reaches a set threshold, the optical path is determined to be in the on state; otherwise, it is in the off state, thereby realizing the dual-channel intensity magnetically controlled tuning function.
[0006] This invention proposes a dual-path light source intensity magnetically controlled tuner. Its operation is as follows: light beams are emitted from X-axis and Y-axis light sources and enter a two-dimensional magnetofluid cavity. The beams propagate within the cavity and pass through the magnetofluid medium. By adjusting electromagnet groups one and two, a controllable two-dimensional magnetic field distribution is formed within the magnetofluid cavity. The transmitted light beams are modulated by the magnetofluid and then transmitted to the corresponding optical axis intensity decision device. The intensity decision device detects the transmitted light power in real time, and outputs a channel on / off signal when a preset threshold is reached.
[0007] The electromagnet group one and electromagnet group two are arranged in an orthogonal symmetrical layout, together forming a composite magnetic field control structure surrounding the two-dimensional magnetofluid cavity. Electromagnet group one is arranged along the X-axis and includes a pair of N / S pole magnetic cores symmetrically arranged on the left and right sides of the cavity; electromagnet group two is arranged along the Y-axis and includes another pair of N / S pole magnetic cores symmetrically arranged on the upper and lower sides of the cavity.
[0008] The X-axis and Y-axis light sources emit light beams that enter a two-dimensional magnetofluid cavity. The light beams are transmitted within the cavity and pass through the magnetofluid medium. The dual-channel independent control is achieved through a strictly orthogonal optical path architecture.
[0009] The X-axis light intensity decision device and the Y-axis light intensity decision device are used to receive and detect the transmitted light intensity along the corresponding axis and determine the on / off state of the light path. Attached Figure Description
[0010] The invention will now be further described with reference to the accompanying drawings.
[0011] Figure 1 This is a diagram of a dual-path light source intensity magneto-controlled tuner. Detailed Implementation
[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0013] See Figure 1A dual-path light source intensity magnetically controlled tuner consists of an electromagnet group one (1), an electromagnet group two (2), a two-dimensional magnetohydrodynamic cavity (3), an X-axis light source (4), an X-axis light intensity decision device (5), a Y-axis light source (6), and a Y-axis light intensity decision device (7). By adjusting the magnetic field strength of the electromagnet group one and the electromagnet group two, the light intensity transmittance of the light beam transmitted along the magnetic field direction is controlled. When the transmitted light intensity reaches a set threshold, the light path is determined to be in the on state; otherwise, it is in the off state, thereby realizing the dual-channel intensity magnetically controlled tuning function.
[0014] Furthermore, two light sources are located in front of the two input ports of the two-dimensional magnetohydrodynamic cavity, emitting light that is transmitted into the cavity. After passing through the region filled with magnetohydrodynamic fluid, the light enters a light intensity decision device, which receives the light, measures the optical power of each channel, and determines whether the optical path channel is open or closed. Two pairs of electromagnets are fixed on both sides of the optical channels in the X and Y directions, respectively, to control the magnetic poles of the electromagnets to form a specific magnetic field.
[0015] Furthermore, electromagnet group one and electromagnet group two are arranged in an orthogonal symmetrical layout, together forming a composite magnetic field control structure surrounding the two-dimensional magnetofluid cavity. Among them, electromagnet group one is arranged along the X-axis direction, including a pair of N and S pole magnetic cores symmetrically arranged on the left and right sides of the cavity; electromagnet group two is arranged along the Y-axis direction, including another pair of N and S pole magnetic cores symmetrically arranged on the upper and lower sides of the cavity.
[0016] Furthermore, the X-axis light source and the Y-axis light source emit beams respectively, which enter the two-dimensional magnetohydrodynamic cavity. The beams are transmitted within the cavity and pass through the magnetohydrodynamic medium layer. The dual-channel independent control is achieved through a strictly orthogonal optical path architecture.
[0017] Furthermore, the X-axis light intensity decision unit and the Y-axis light intensity decision unit are used to receive and detect the transmitted light intensity along the corresponding axis and determine the on / off state of the light path.
[0018] Furthermore, the magnetic fluid within the two-dimensional magnetofluid cavity is a Fe3O4 nanoparticle dispersion system with a volume concentration ranging from 5% to 20%.
[0019] The working process of the present invention has been described in detail above. For those skilled in the art, there may be changes in the specific implementation based on the ideas provided by the present invention, and these changes should also be considered as part of the protection scope of the present invention.
Claims
1. A dual-path light source intensity magnetically controlled tuner, characterized in that, The system includes electromagnet group one (1), electromagnet group two (2), a two-dimensional magnetohydrodynamic cavity (3), an X-axis light source (4), an X-axis light intensity decision device (5), a Y-axis light source (6), and a Y-axis light intensity decision device (7). The light beams emitted from the X-axis and Y-axis light sources enter the two-dimensional magnetohydrodynamic cavity, pass through the magnetohydrodynamic fluid, and then converge onto the detection surfaces of the X-axis and Y-axis light intensity decision devices. The X-axis and Y-axis light intensity decision devices detect the received optical power in real time and compare it with a preset threshold, ultimately outputting a decision signal indicating the on / off state of the corresponding optical path, thus enabling the on / off state of the two optical paths in the X and Y directions.
2. The dual-path light source intensity magnetotuner according to claim 1, characterized in that: The two-dimensional magnetohydrodynamic (MHD) optical path tuner is based on the magneto-optical effect of MHD. It controls the alignment of magnetic nanoparticles in the MHD by adjusting the magnetic field strength of electromagnet groups one and two. When no magnetic field is applied, the magnetic nanoparticles (such as Fe3O4) in the MHD are randomly and uniformly distributed. After a magnetic field is applied, the particles are reoriented along the magnetic field direction by the Lorentz force, forming a chain-like structure. When the light transmission direction is parallel to the particle alignment direction, the optical path has a low duty cycle and high transmittance, and the light intensity decision device determines it to be in the on-state. When the light transmission direction is perpendicular to the particle alignment direction, the optical path has a high duty cycle and low transmittance, and it is determined to be in the off-state. By independently controlling the currents of the two electromagnets, the on / off state of the optical path in the X and Y directions can be controlled separately, realizing a dual-channel magnetically controlled optical path tuning function.
3. The dual-path light source intensity magnetotuner according to claim 1, characterized in that: The symmetrically arranged electromagnet group one and electromagnet group two constitute a magnetic field control structure surrounding the two-dimensional magnetohydrodynamic cavity.
4. The dual-path light source intensity magnetotuner according to claim 1, characterized in that: The X-axis light source and the Y-axis light source are incident on the two-dimensional magnetohydrodynamic cavity along orthogonal directions, respectively.
5. The dual-path light source intensity magnetotuner according to claim 1, characterized in that: The X-axis light intensity detector and the Y-axis light intensity detector are used to detect the transmitted light intensity along the corresponding axis and determine the on / off state of the light path.