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Small multimode light source

A light source, small-scale technology, applied in the direction of light guide, optics, optical components, etc., can solve the problems of difficult integration and large lens size, and achieve the effect of small light source size, compact structure, and easy integrated installation

Inactive Publication Date: 2019-12-10
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are two disadvantages in this solution: 1) the size of the lens is large, and the He-Ne laser, SLD light source or white light source based on incandescent lamps used are difficult to integrate into the fiber optic far-field scanner; 2) additional Configure chopper for simultaneous modulation of "full injection" light source and lock-in amplifier

Method used

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Embodiment Construction

[0027] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0028] combine figure 2 and image 3 , a small multi-mode light source, including a light source module, the light source module is provided with a spherical lens and an optical fiber jumper, the input light source acts on the spherical lens to converge into a light spot, the light spot is coupled to the optical fiber jumper, and the input light source is an LED light source , the maximum numerical aperture of the fiber jumper is 0.5, and the position EEL between the spherical lens and the fiber jumper is obtained by formula (1),

[0029]

[0030] Wherein, D is the diameter of the ball lens, n is the refractive index of the ball lens;

[0031] According to formula (2), the effective focal length BFL of the ball lens is obtained,

[0032]

[0033] Combining formula (1) and formula (2), the numerical aperture is cal...

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Abstract

The invention discloses a small multi-mode light source, and particularly relates to the technical field of multi-mode light sources. The small multi-mode light source adopts an LED light source, andhas the characteristics of wide spectral range and satisfying wide spectrum in a full injection condition; in addition, a light source focusing scheme based on the spherical lens enlarged numerical aperture optical fiber patch cord is designed, so that during the researching of the LED light source, the divergence angle and a transmission distance of a light source are calculated; the size of a light spot of a light source is controlled to be about 300 microns, then an N-BK series spherical lens is adopted, and the light spot converged by the spherical lens is coupled to an optical fiber jumper through theoretical derivation and mathematical calculation, so that the spherical lens is integrated into a light source module, and optical fiber output of the multimode full-injection light source is realized.

Description

technical field [0001] The invention relates to the technical field of multi-mode light sources, in particular to a small multi-mode light source. Background technique [0002] Numerical aperture is a characteristic parameter that characterizes the light-collecting ability of a multimode fiber. It is a measure of whether the fiber is easy to be excited, and how easy it is to couple the fiber with the light source or other fibers. The value of numerical aperture and its tolerance range are closely related to the transmission characteristic parameters such as microbending loss, connection loss, attenuation temperature characteristics and transmission bandwidth of the optical fiber. Therefore, it is necessary to accurately measure the numerical aperture in practical applications such as the development and production of optical fibers, cable formation of optical fibers, laying of optical cables, and construction splicing. At present, the benchmark measurement method for optica...

Claims

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Application Information

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IPC IPC(8): G02B6/26G02B6/32
CPCG02B6/262G02B6/32
Inventor 韩正英郑光金高业胜赵耀尚福洲刘志明
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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