Electric field sensing element with all-fiber structure and electric field sensing device
A sensitive element, all-fiber technology, applied in the field of optoelectronics, can solve the problems of increasing the structural complexity and manufacturing cost, the electric field sensor cannot be all-fiber, the loss of waveguide and fiber, etc., to achieve easy optical integration, reduce device size, Sensitive effect
Inactive Publication Date: 2015-01-14
ZHEJIANG UNIV
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Problems solved by technology
[0005] However, this type of electric field sensor cannot be fully fiber-optic, and has a complex structure, high cost, and large volume, and it is difficult to achieve optical integration. Moreover, the coupling between the waveguide and the optical fiber will cause large losses, and it is difficult to realize cascading to form a quasi-distributed transmission. sense network
In addition, this type of electric field sensor is implemented based on crystal materials. On the one hand, due to the polarization characteristics of the crystal, the probe of the electric field sensor needs to be connected to the light source with a polarization-maintaining optical fiber, and another transmission optical fiber is required to guide the interference signal light into the measurement system. Further increase the complexity of the structure and the preparation cost
On the other hand, the photoelectric properties of crystal materials are sensitive to temperature, which directly leads to the performance of the electric field sensor based on the crystal material is also sensitive to temperature. operational complexity
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[0047] The present invention will be described in detail below with reference to the drawings and specific embodiments.
[0048] The electric field sensitive element of the all-fiber structure of the present embodiment comprises optical fiber (being SMF-28 type single-mode optical fiber, only has core and cladding) and phase modulation component, and one end of optical fiber is as the input end of electric field sensitive element, and the other end is as output At the end, the phase modulation component is used to change the phase of part of the signal light in the optical fiber under the action of an electric field, which is a graphene film wrapped outside the cladding of the optical fiber.
[0049] The specific structure of the electric field sensitive element of the present embodiment is as follows figure 1 As shown, the outer periphery of the fiber core is provided with two mode converters arranged at intervals along the signal light transmission direction, and at least a ...
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Abstract
The invention discloses an electric field sensing element with an all-fiber structure and an electric field sensing device. The electric field sensing element comprises optical fibers and a phase modulation part; one end of the optical fibers serves as an input end of the electric field sensing device while the other end of the optical fibers serves as an output end; the phase modulation part is used for enabling partial signal light in the optical fibers to change phases under the action of electric fields. Due to the fact that the electric field sensing element is in the all-fiber structure, on the one hand, insertion loss is reduced, and on the other hand, reduction of device size is benefited, integration is facilitated, and the electric field sensing device prepared based on the electric field sensing element cannot influence a tested electric field during application of the electric field sensing device and has the advantages of high sensitivity, favorableness to optical integration and the like.
Description
technical field [0001] The invention relates to the field of optoelectronic technology, in particular to an electric field sensitive element and an electric field sensing device with an all-fiber structure. Background technique [0002] Electric field measurements have important applications in science, industry, and business. The traditional electromagnetic wave measurement system uses an active metal detector, which will inevitably cause electromagnetic interference, generate electromagnetic field distortion, and cause the measurement system to be very sensitive to electromagnetic noise. With the development of optoelectronic technology, in order to solve the interference of electromagnetic noise in the electromagnetic wave measurement system, Bulmer of the U.S. Naval Research Institute and W. LANG of NPL in the United Kingdom have organically integrated optical waveguides, electrodes and antennas to prepare an optical waveguide. An integrated photoelectric electric field...
Claims
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Login to View More IPC IPC(8): G02F1/03G02B6/42G02B6/14
CPCG02F1/0327G02B6/14
Inventor 周锋金晓峰章献民池灏郑史烈
Owner ZHEJIANG UNIV