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Optical fiber power monitoring structure

A technology of power monitoring and optical fiber, which is applied in the field of optical fiber power monitoring structure, can solve the problems of high assembly requirements, large additional loss, and high loss, and achieve the effects of being conducive to integrated development, simple packaging structure, and low loss

Inactive Publication Date: 2019-11-29
FUZHOU PHOTOP QPTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the commonly used optical fiber transmission optical power monitoring devices are mainly divided into the following categories according to the different ways of splitting energy: 1) The splitting type of the coupler is as follows: figure 1 As shown, the use of optical fiber couplers to split light to photodetectors for monitoring has disadvantages: high cost, large insertion loss (coupler), and large volume; 2) reflection splitting type such as figure 2 As shown, the input and output two optical fibers are processed into a bidirectional collimator, and a part of the reflector or film layer is placed, and then the photodetector is used to receive the energy of the transmitted light. Its disadvantages: high assembly requirements, large additional loss, no Suitable for high power monitoring; 3) Cladding spectroscopic type such as image 3 As shown, opening a window on the cladding of the optical fiber does not destroy the fiber cladding splitting type of the fiber core. Its disadvantages are: complex process, polishing gap (high loss), low efficiency

Method used

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Examples

Experimental program
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Embodiment 1

[0025] Example 1, such as Figure 4 As shown, the fiber grating 2 provided on the fiber core 1 is a group, and the photosensitive receiving element 3 is a CCD detector or a PD detector. In this embodiment, the light passing direction between the fiber grating 2 and the fiber core 1 is 45°, and the light intensity of the fiber grating 2 is reflected, and part of the light intensity separated from the side of the fiber is received and combined with the photosensitive receiving element 3 to form a power monitor with a simple structure.

Embodiment 2

[0026] Example 2, on the basis of Example 1, such as Figure 5 As shown, there are more than two groups of fiber gratings 2 arranged on the core 1 and the periods of the fiber gratings 2 of different groups are different from each other. According to the different periods of different groups of fiber gratings 2, it is possible to monitor the power or energy of multiple band optical signals.

Embodiment 3

[0027] Example 3, on the basis of Example 1, such as Image 6 As shown, the fiber grating 2 is a long-period chirped grating, which can be used with a CCD or PD detector array to monitor the power or energy of a wide-band optical signal.

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Abstract

The invention discloses an optical fiber power monitoring structure. The optical fiber power monitoring structure comprises an optical fiber and a photosensitive receiving element used for monitoringoptical signal energy or power; a fiber bragg grating forming an inclination angle with the light transmission direction is arranged in a fiber core of the optical fiber, and part of optical signals transmitted in the fiber core are reflected by the fiber bragg grating, then leaked out of a cladding of the optical fiber in the form of a radiation mode and received by the photosensitive receiving element. By utilizing the characteristics of the fiber bragg grating, power or energy of different wavelengths can be monitored, and the optical fiber power monitoring structure has the characteristicsof simple structure, low cost and the like.

Description

Technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to an optical fiber power monitoring structure. Background technique [0002] At present, the commonly used optical fiber transmission optical power monitoring devices are mainly divided into the following categories according to the different ways of splitting the optical energy: 1) The splitter type such as figure 1 As shown, the use of optical fiber coupler to split light to photodetector for monitoring has disadvantages: high cost, large insertion loss (coupler), and large volume; 2) The reflection type figure 2 As shown, the input and output two optical fibers are processed into a bidirectional collimator, and a partially reflective sheet or film layer is placed, and then a photodetector is used to receive the energy of the transmitted light. Its disadvantages: high assembly requirements, large additional loss, and no Suitable for high-power monitoring; 3) Claddi...

Claims

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Application Information

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IPC IPC(8): H04B10/079G02B6/42
CPCG02B6/4286H04B10/07955
Inventor 吴砺蔡光明黄富泉赵武丽李阳林磊
Owner FUZHOU PHOTOP QPTICS CO LTD
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