3 ports optical circulator Manufacturers

As an important part of optical fiber communication system, optical module plays the role of photoelectric conversion. This article will introduce the core devices of the optical module.

Laser distance measuring is measured using a laser as a light source.It is divided into continuous laser and pulse laser according to the mode of laser operation.Gas lasers like helium-neon, argon ion, krypton cadmium and so on work in a continuous output state for phase laser ranging, dual heterogeneous GaAs semiconductor laser for infrared ranging; solid laser such as ruby, neodymium glass, for pulse laser ranging.Laser rangefinder due to the characteristics of good monochromy and strong orientation of laser, coupled with the semiconductor integration of electronic lines, compared with the photoelectric rangefinder, it can not only work day and night, but also improve the rangefinder accuracy.

For polarization-maintaining (PM) optical fiber, assuming that the polarization direction of the input linearly polarized light is in the middle of the fast axis and the slow axis, it can be decomposed into two orthogonal polarization components. As shown in the figure below, the two light waves initially have the same phase, but because the refractive index of the slow axis is greater than that of the fast axis, their phase difference will increase linearly with the propagation distance.

In recent years, thulium-doped fiber lasers have attracted more and more attention due to their advantages such as compact structure, good beam quality, and high quantum efficiency. Among them, high-power continuous thulium-doped fiber lasers have important applications in many fields such as medical care, military security, space communications, air pollution detection, and material processing. In the past nearly 20 years, high-power continuous thulium-doped fiber lasers have developed rapidly, and the current maximum output power has reached the kilowatt level. Next, let’s take a look at the power improvement path and development trends of thulium-doped fiber lasers from the aspects of oscillators and amplification systems.

Compared with traditional oxyacetylene, plasma and other cutting processes, laser cutting has the advantages of fast cutting speed, narrow slit, small heat affected zone, good verticality of slit edge, smooth cutting edge, and many kinds of materials that can be cut by laser. Laser cutting technology has been widely used in the fields of automobiles, machinery, electricity, hardware and electrical appliances.