Brief analysis of the difference between single-mode and multi-mode fiber-coupled lasers

- 2021-09-01-

Fiber-coupled lasers are becoming more and more popular in the market in the field of laser processing due to their high electrical-optical conversion efficiency, high stability, high beam quality and low cost of use, and they are used as an extremely high-quality light source. Fiber-coupled semiconductor lasers are divided into single-mode fiber-coupled lasers and multi-mode fiber-coupled lasers. The fiber-coupled lasers developed and produced  Laser are multi-mode fiber-coupled lasers. The core of multi-mode fiber-coupled lasers is thicker. The energy distribution is relatively even.

The module composition of fiber-coupled lasers is divided into single-mode and multi-mode. The single-mode laser has a thinner core, better beam quality than multi-mode, and the energy distribution is Gaussian. The middle energy density is the highest. The three-dimensional image is a sharp round Peak-shaped. Fiber coupled laser


The fiber core of a multimode laser is thicker than that of a single mode, and the beam quality is worse than that of a single mode. The energy distribution is more average than that of a single mode. A three-dimensional image is an inverted cup. Single mode is much steeper.

The light source of the multi-mode optical module is a light-emitting diode or laser, while the light source of the single-mode optical module is an LD or an LED with a narrow spectral line.