Figure 8-core optical fiber to prevent weld end without injury in recent years, high-power femtosecond pulse fiber lasers developed both in theory and experiment have made great strides, still chirped pulse amplification to obtain high-power ultrashort pulses mainstream technology, all-fiber structure is its trend. The new fiber structure, high energy and better performance fiber materials fiber femtosecond pulse stretcher and compressor, particularly in the photonic crystal fiber laser based on a new device appears, for ultrashort pulse fiber laser is designed to provide new ideas. Received Date: 2008-04-09; receive Revised Date: 2008-06-23 Author: Li Chao, (1976 -), Jiangxi, Ph.D., South China University of Physical damage by the laser in Figure 7 Fiber Lecturer, Research fiber laser technology. The client has some suggestions for some items of green laser pointer agreement.
Instructors: Xu Wencheng, (1965 -), Anhui, professor, doctoral tutor, the main research and ultrashort pulse fiber laser technology. E-mail: xuwch@scnu.edu.cn Tünnermann.A. [9] and Limpert.J. [7] proposed an example, a small solution, the fiber ends for special treatment. Fiber splicing without core segment in the fiber amplifier output, shown in Figure 8. Laser beam will expand in non-core fiber, which makes the laser power density decreased, thus avoiding damage to the fiber end effects. Femtosecond laser is a laser over the past 20 years, science developed one of the most powerful new tools. Femtosecond time domain pulse width is so short, the current has reached 4fs less. 1 femtosecond (fs), the 10-15s, only 10 million billionths of a second, if the 10fs to measure the universe as a geometric average, but their life expectancy is only 1min only. The disassembly operation of green laser pointer can be easily mastered for the customer.
Femtosecond pulse is so strong, multi-level chirped pulse amplification (CPA) technique to obtain the maximum pulse peak power can reach 10 terawatts (TW, ie 1012W) even beat Watts (PW, ie 1015W) magnitude, the intensity of solar radiation than to focus on the planet all the light is focused into the tip after the size of the energy density is even higher. Femtosecond laser is completely a miracle of human creation. Past two decades, from the Kerr-lens mode-locked dye laser to a femtosecond laser Ti stones and, later, the femtosecond diode-pumped solid-state lasers and femtosecond fiber laser, although the pulse width and energy is constantly refresh the record , but the greatest progress than an ultra-femtosecond pulse becomes a breeze. Sandia National Laboratories R. Trebino said: "Over the past 10 years, ultra-fast) (technology has improved significantly, titanium sapphire laser and fiber laser is now to make this (femtosecond) laser operation becomes simplicity and stability. The weekly report of green laser pointer is required to submit.
This laser has been able to buy one now, but 10 years ago, but you must create. "For example, the famous manufacturer of femtosecond laser system Clark-MXR United States will produce high-power femtosecond pulses of all the components all integrated into a box, using erbium-doped fiber femtosecond laser as a seed source, with no adjustment (NO Tweak) of special design, forming the world's unique, ultra-stable, ultra-compact CPA2000 Series Titanium Gem chirped pulse amplification system does not require such a commercial femtosecond expert system to operate, can be widely used in scientific research and industrial in many areas on according to ultra-short femtosecond laser and superior features, in general, applied research can be divided into ultra-fast transient phenomenon and powerful phenomena. The top selling list of green laser pointer contains all products which sell well in the market.
They are reduced as the laser pulse width and pulse energy increases to in-depth and continuous development. Femtosecond pulse laser is the most direct application people use it as a light source to form a variety of time-resolved spectroscopy and pump / probe techniques. Directly contributing to the development of its physical, chemical, biological, materials and information science research into the microscopic field of ultrafast process, and created some new research areas, such as femtosecond chemistry, quantum control of chemical, semiconductor coherent spectroscopy. Femtosecond pulse laser and the combination of nano-microscopy, so that people can study semiconductor nanostructures (quantum wires, quantum dots and nanocrystals) in the carrier dynamics. These two green laser pointer will be disposed as the scrap.
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