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Measurement method and device for holospectrum of optical waveguide device

A measurement method and measurement device technology, which is applied in the field of optical sensing and measurement, and spectral measurement, can solve problems such as large measurement errors, and achieve the effects of wide application range, high precision, and strong anti-interference ability

Inactive Publication Date: 2017-09-01
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can measure the amplitude spectrum or phase spectrum of the device under test, but the measured amplitude spectrum includes the light source spectrum, which will bring large measurement errors

Method used

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  • Measurement method and device for holospectrum of optical waveguide device
  • Measurement method and device for holospectrum of optical waveguide device
  • Measurement method and device for holospectrum of optical waveguide device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: as figure 1Shown, the embodiment of optical waveguide device holographic spectrum measurement method is: broadband light source refers to the light source that its spectral distribution range is wider (as greater than 20nm); Use erbium-doped fiber to amplify spontaneous emission (ASE) light source as broadband light source 1, its The spectral range is 1528-1610nm, and the output optical power is 30mW; the light output by the broadband light source 1 is transmitted to the three-splitting device 2, and the three-splitting device 2 divides the output light of the broadband light source 1 into three beams, and these three beams are respectively recorded as The light splitting ratio between the first light, the second light and the third light is determined by the internal structure of the three light splitting device; the first light beam output by the three light splitting device 2 is incident on the optical waveguide device 3 under test, and The reflected li...

Embodiment 2

[0037] Embodiment 2: as figure 2 As shown, the embodiment of the optical waveguide device holographic spectrum measurement method and device is: use an incandescent lamp or a broadband light-emitting diode or a superluminescent light-emitting diode coupled through an optical fiber as a broadband light source, its spectral bandwidth is greater than 30nm, and its output optical power is greater than 10mW; The light output by the broadband light source is transmitted to the three-beam splitting device through the circulator C0 and is divided into three beams for output; the three-beam splitting device is composed of two fiber couplers C1 and C2, one of which is the fiber coupler C1. The light source is divided into two beams of light, and another fiber coupler C2 divides any one of the two beams of light into two beams of light, so that the two beams of light output by the fiber coupler C2 and the other beam of light output by the fiber coupler C1 The beams of light constitute t...

Embodiment 3

[0042] Embodiment 3: as image 3 and figure 2 As shown, the difference between the method for measuring the holographic spectrum of an optical waveguide device in this embodiment and Embodiment 2 is that the second beam of light output by the three-way splitting device is transmitted to the fixed optical path; the transmitted light of the fixed optical path is used as The second signal light is transmitted to the input end of the fiber coupler C3 as the second optical combiner, and interferes with the second reference light to form interference light b; the other parts of this measurement method are the same as in Embodiment 2.

[0043] The difference between the optical waveguide device holographic spectrum measurement device in this embodiment and Embodiment 2 is that a section of optical fiber with a fixed length is used as a fixed optical path, and the second output end of the three-way splitting device is connected to the fixed optical path. One end, the other end of th...

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Abstract

The invention discloses a measurement method and device for holospectrum of an optical waveguide device. The method comprise the following steps: a broadband light source is divided into three light beams, the light beams are transmitted to a to-be-measured optical waveguide, a fixed-optical-distance optical path and a mirror respectively, and two ways of signal light and one way of reference light are obtained; the reference light and the two ways of signal light are subjected to interference, two ways of interference light are obtained and subjected to photovoltaic conversion, and two electric signals are obtained; in a mirror moving process, continuous sampling and AD conversion of the two electric signals are performed, and two groups of data are obtained and subjected to Fourier transform; the amplitude spectrum of the optical waveguide is calculated by means of two amplitudes of Fourier transform, and phase spectrum of the optical waveguide is calculated by means of a real part and an imaginary part of Fourier transform. On the basis of the method, the measurement device for the holospectrum of the optical waveguide device can be constituted by the broadband light source, an optical splitter / combiners, the fixed-optical-distance optical path, the movable mirror, photodetectors, a data acquisition system and a computer. The measurement method and device have the advantages that the interference resistance and precision are high, the amplitude spectrum and the phase spectrum of the optical waveguide can be measured simultaneously and the like.

Description

technical field [0001] The invention relates to the field of optical sensing and measurement, in particular to a method and device for measuring a holographic spectrum of an optical waveguide device, belonging to the field of spectrum measurement. Background technique [0002] Optical waveguide devices can be widely used in optical fiber communication, optical sensing, integrated optics, biochemical physics, medical diagnosis and other fields. With the improvement of optical waveguide device manufacturing technology and the expansion of application fields, people have higher and higher requirements for optical waveguide device characteristic testing. The holographic spectrum of the optical waveguide device includes amplitude spectrum and phase spectrum information, including the internal structure and characteristic information of the optical waveguide device. The acquisition of holographic spectrum requires a high-reliability, high-sensitivity, high-resolution amplitude sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/00G03H1/04G03H1/16
Inventor 曾祥楷李顺祺南帅军
Owner CHONGQING UNIV OF TECH