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Tunable optical-fiber filter

An optical fiber filter and tuning technology, applied in the fields of instruments, optics, nonlinear optics, etc., can solve the problems of lack of erasability, expensive production equipment, and inability to change related parameters.

Inactive Publication Date: 2014-04-30
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the traditional long-period fiber grating is prepared, the parameters are fixed and do not have erasability. The relevant parameters cannot be changed, that is, they cannot be restored, such as the period of the grating, the amplitude of the modulation, etc., and the production equipment is expensive and complicated.

Method used

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  • Tunable optical-fiber filter

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Embodiment Construction

[0010] Below in conjunction with accompanying drawing of description, the present invention is further described:

[0011] Such as figure 1 As shown, a tunable optical fiber filter includes a long-period equidistant V-groove sawtooth plate 1, screws 2, screw holes 3, common single-mode optical fibers 4, and an incubator 5. The common single-mode fiber The mode fiber 4 is fixed by two long-period and equidistant V-shaped groove serrations 1 through screws 2 to form a filter, and the entire filter device is placed in a constant temperature box 5, and the two ends of the ordinary single-mode fiber 4 pass through the fiber The connector is connected to the external optical circuit.

[0012] The working mode of the device of the present invention is as follows: when debugging the filter, the two ends of the ordinary single-mode optical fiber are respectively connected to the broadband light source and the optical fiber spectrometer through the optical fiber connector, and the filt...

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Abstract

The invention belongs to the technical field of optical fiber sensing, and particularly relates to a tunable optical-fiber filter. Two V-shaped groove serrate plates with long cycle and equal interval are used to apply stress to single-mode optical fibers so as to form a long-cycle grating. After the long-cycle grating is placed in a thermostatic chamber, temperature is changed through a thermostatic oven, and wavelength of filter wave is changed as needed. Since the two V-shaped groove serrate plates with long cycle and equal interval apply stress to the single-mode optical fibers after being fixed with screws, attenuation degree of light wave intensity is regulated on the condition of keeping the central wavelength of resonance wave constant, and filtering performance is improved. The tunable optical-fiber filter capable of changing wavelength of the filter wave and attenuation degree of light intensity simultaneously is simple in structure and has erasability.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and in particular relates to a tuneable optical fiber filter. Background technique [0002] With the rapid development of optical fiber communication and optical fiber sensing, optical filters have been widely used and developed rapidly. In optical fiber communication and optical fiber sensing, different wavelengths carry different information. At the receiving end, to separate the required wavelength from the optical fiber, an optical filter is used. The main function of optical filters is to selectively pass light waves, and only light waves of specific wavelengths can pass or be filtered out. [0003] Optical filters can also be widely used in laboratories, optical communications, optical sensing and other fields. At present, the main component of optical filter is long-period fiber grating. The parameters of the traditional long-period fiber grating are fixed after the prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/01
Inventor 孙明明金永兴王栋远范涌涛
Owner CHINA JILIANG UNIV
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