Gain fiber absorption coefficient measuring device and method based on side scattered light detection
A technology for gaining optical fiber and absorption coefficient, which is applied in measuring devices, testing optical fiber/optical waveguide equipment, and optical instrument testing. error, shortened measurement time, and simple measurement process
Active Publication Date: 2021-05-07
NAT UNIV OF DEFENSE TECH
View PDF17 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The problem with this method is: the spatial optical path cannot completely separate the ASE light, and there is a certain systematic error; too long optical fiber is easy to introduce bending loss and mode scrambling effect, changing the pump absorption characteristics; and, the number of measurements is not enough, it is easy to introduce random error
The problem with this method is that: the oscillator structure is formed, and the signal light in the fiber core is strong at this time, which may cause stimulated absorption, thereby overestimating the absorption of the fiber; Cutting, different cutting angles will affect the laser, thus affecting the measurement of absorption coefficient
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0028] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.
[0029] In one embodiment, such as figure 1 and figure 2 As shown, a gain fiber absorption coefficient measurement device based on side scattered light detection is provided, including a fiber detector 5 and a fiber fixing table 3 . Three grooves are arranged in parallel on the surface of the optical fiber fixing platform 3 , including two first sliding grooves 302 and second sliding grooves 303 with the same size, and one optical fiber limiting groove 301 passing through the surface. The chute can run through the surface where it is set, or it can be set according to th...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
| height | aaaaa | aaaaa |
| width | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a gain fiber absorption coefficient measuring device and method based on side scattered light detection. The device comprises an optical fiber detector and an optical fiber fixing table; the optical fiber detector is arranged on the optical fiber fixing table through a sliding structure; the opposite surfaces of the optical fiber detector and the optical fiber fixing table form a tubular channel with a fixed cross section shape; the direction of the tubular channel is consistent with the sliding direction of the optical fiber detector; and the tubular channel is used for fixedly placing a to-be-measured gain optical fiber. When test optical signals pass through the to-be-measured gain optical fiber, the optical fiber detector slides to a plurality of measurement positions to obtain side scattered light signals of the to-be-measured gain optical fiber. According to the device, the measurement distance of the to-be-measured gain optical fiber is fixed by the optical fiber detector, the absorption coefficient is calculated by obtaining the side scattered light signals of the to-be-measured gain optical fiber; the optical fiber does not need to be cut or moved during measurement, so that measurement errors caused by measurement operation factors can be reduced; and measuring time can be obviously shortened, so that the measuring error caused by the precision fluctuation factor of a measuring instrument is reduced.
Description
technical field [0001] The present application relates to the field of fiber laser technology, in particular to a device and method for measuring the absorption coefficient of gain fiber based on side scattered light detection. Background technique [0002] Gain fiber is one of the core components of optical lasers. Its role is to absorb pump light and generate particle population flips, thereby providing gain for the laser. Measuring the pump absorption coefficient of the gain fiber is of great significance for the fiber drawing process, the construction of the fiber laser and the suppression of nonlinear effects. [0003] The current system and method for measuring the absorption coefficient of gain fibers is mainly based on the law of exponential attenuation of pump light, using the truncation method to measure the remaining pump light output when different gain fiber lengths are used, and then calculate the fiber absorption coefficient. [0004] Existing technology 1 (a...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/00
CPCG01M11/30
Inventor 张汉伟吴金明王小林奚小明杨保来史尘王泽锋许晓军
Owner NAT UNIV OF DEFENSE TECH