laser pointer also plays a significant role in exhibiting

laser pointer also plays a significant role in exhibiting.
Traction is the laser linewidth and frequency to the laser characteristics. Line width is due to the presence of spontaneous emission, and therefore can not be excluded, so called width limit. Greater output power, the more narrow linewidth. This is because the output power increase means an increase in the number of cavity photon coherent, stimulated emission accounts for more than the spontaneous emission, and therefore, narrow linewidth. Reduce losses and increase the cavity length can also narrow linewidth. For example, the semiconductor laser cavity length because only a few hundred microns and has a wide laser linewidth. If it is outside mirror with a form will enable the external cavity semiconductor laser linewidth significantly reduced.
Its life span is generally room temperature up to 10 million hours of high temperature aging test at room temperature projected life span of up to one million hours, so it is a long, high-reliability products ordered. The above describes some of the development of display technology and its principles, the future development of the area will be popular in the hot, also looking forward to a breakthrough in display technology has improved. Enable students to understand the history of the laser, the formation and development of the laser, the formation of the theoretical system. Make students understand the scientific branch of the laser and laser in the military, information technology, medical, and other applications; early 1917 - Einstein first predicted stimulated emission laser. Technically the use of multi-longitudinal-mode output of the laser beam, through a special modulation, it has been determined between each longitudinal mode of the phase relations. As spontaneous and stimulated emission of radiation compared to the contribution of extremely weak, and thus the discussion of threshold issues such as output power can be negligible; But in considering the issue width Shique must consider the impact of spontaneous emission.As the role of the dye cavity gain, phase correlation part of the light field to quickly highlight, and a random part is suppressed. Phase correlation between the beat frequency model, the formation of a narrow width of the collision mode-locked pulses. This approach has been able to get the order of 10 fs ultrashort optical pulses.Because the dye medium produces rapid gain saturation effect, so the pump pulse width compared with the received pulse width becomes very narrow. Hydrogen ion mode-locked laser with 100 ps pump pulses of light from a Rhodamine 6G dye laser to obtain the pulse width 0.6-1ps, up to 1 kW peak power pulses of light.