High Power EDFA Amplifier Module Manufacturers

Since Maman first obtained laser pulse output in 1960, the process of human compression of laser pulse width can be roughly divided into three stages: Q-switching technology stage, mode-locking technology stage, and chirped pulse amplification technology stage. Chirped pulse amplification (CPA) is a new technology developed to overcome the self-focusing effect generated by solid-state laser materials during femtosecond laser amplification. It first provides ultra-short pulses generated by mode-locked lasers. "Positive chirp", expand the pulse width to picoseconds or even nanoseconds for amplification, and then use the chirp compensation (negative chirp) method to compress the pulse width after obtaining sufficient energy amplification. The development of femtosecond lasers is of great significance.

When the incident light flux leaves from the illuminated surface or the incident surface of the medium to the other side, the ratio of the radiant energy projected and transmitted through the object to the total radiant energy projected on the object is called the transmittance of the object. The percentage of radiant energy reflected by an object to the total radiant energy is called reflectivity.

Laser is considered to be one of the greatest inventions of mankind in the twentieth century, and its appearance has strongly promoted the progress of detection, communication, processing, display and other fields. Semiconductor lasers are a class of lasers that mature earlier and progress faster. They have the characteristics of small size, high efficiency, low cost, and long life, so they are widely used. In the early years, infrared lasers based on GaAsInP systems laid the cornerstone of the information revolution.

The team of Professor Rao Yunjiang of the Key Laboratory of Optical Fiber Sensing and Communications of the Ministry of Education, University of Electronic Science and Technology of China, based on the main oscillation power amplification technology, realized for the first time a multimode fiber random with an output power of >100 W and a speckle contrast lower than the human eye speckle perception threshold. Lasers, with the comprehensive advantages of low noise, high spectral density and high efficiency, are expected to be used as a new generation of high-power and low-coherence light sources for speckle-free imaging in scenes such as full field of view and high loss.