1. First of all, in terms of optical components, the formation of annular beam requires the use of specific optical components, the most common one is the annular diaphragm, which is an optical device with a central opening covered by an annular cover. The brightness and size of the annular beam can be controlled by adjusting the size of the central opening and the width of the annular cover.

2. Secondly, in terms of transmission modes, the ring beam can be formed by different transmission modes, the most common transmission modes are Gaussian mode and Laguerre-Gaussian mode, and Gaussian mode is a basic TEM00 mode, showing Gaussian distribution in both horizontal and vertical light intensity distribution.

3. Finally, the input optical fiber includes a support frame, and the light beam is shaped into a ring-shaped light beam by spatial shaping to be collected.