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.
Semiconductor laser has the advantages of small size, light weight, high electro-optical conversion efficiency, high reliability and long life. It has important applications in the fields of industrial processing, biomedicine and national defense.
Scientists have developed a new type of laser that can generate a lot of energy in a short period of time, which has potential applications in ophthalmology and heart surgery or fine materials engineering. Professor Martin De Steck, director of the Institute of Photonics and Optical Sciences at the University of Sydney, said: The characteristic of this laser is that when the pulse duration is reduced to less than one trillionth of a second, the energy can also be "instantly "At its peak, this makes it an ideal candidate for processing materials that require short and powerful pulses.
Ultra-long distance non-relay optical transmission has always been a research hotspot in the field of optical fiber communication. The exploration of new optical amplification technology is a key scientific issue to further extend the distance of non-relay optical transmission.
Randomly distributed feedback fiber laser based on Raman gain, its output spectrum has been confirmed to be wide and stable under different environmental conditions, and the lasing spectrum position and bandwidth of the half-open cavity DFB-RFL is the same as the added point feedback device The spectra are highly correlated. If the spectral characteristics of the point mirror (such as FBG) change with the external environment, the lasing spectrum of the fiber random laser will also change. Based on this principle, fiber random lasers can be used to realize ultra-long-distance point-sensing functions.
Lithography is a technique for transferring a designed pattern directly or through an intermediate medium onto a flat surface, excluding areas of the surface that do not require a pattern.
Copyright @ 2020 Shenzhen Box Optronics Technology Co., Ltd. - China Fiber Optic Modules, Fiber Coupled Lasers Manufacturers, Laser Components Suppliers All Rights Reserved.
