1. How to couple optical power from multiple types of luminescent light sources into a specific optical fiber;

2. How to transmit optical power from one fiber and couple it into another fiber through a specific device.

In both cases, a series of factors need to be considered, including the numerical aperture of the fiber, the core size of the fiber, the refractive index distribution of the fiber core, etc. In addition, the size of the light source, radiation intensity, and angular distribution of optical power also need to be considered. Each connection method is subject to certain specific conditions, which will result in varying amounts of optical power loss at the connection point. These losses depend on certain parameters, such as the input power distribution at the connection point, the length of the optical fiber between the light source and the connection point, the geometric and waveguide characteristics of the two optical fibers connected at the connection point, and the quality of the fiber end face. In addition, there is a significant difference in optical power loss between the connections between multimode fibers and single-mode fibers, which needs to be treated differently.

Fiber optic coupling and characteristic testing experimental systemIt is developed by our company to address the above issues. By building an experimental platform, students can gain a deeper understanding of the relevant parameters and characteristics of fiber coupling, and also exercise their hands-on abilities in calibrating optical paths and other aspects.

Instrument function:

1. 650nm laser and fiber coupling experiment

2. 1550nm fiber laser and fiber coupling experiment

3. Coupling experiment between fibers of the same mode

4. Coupling experiment between different modes of optical fibers

5. Comparative experiment on coupling characteristics of light source, microscope objective and collimator