Have A Clearer Understanding Of The Working Principle Of The Green Laser Pointer
Let's first understand the working principle of the green laser pointer. The laser working material is located in the resonant cavity. When the population inversion occurs between a certain pair of energy levels of the working material, the frequency is at the width of the spontaneous emission spectrum of this pair of energy levels. The weak optical signal inside will Gain Gain and expand; due to various losses in the resonant cavity, the optical signal will continue to attenuate when it is transmitted. Whether the oscillation can be generated depends on the gain and loss. In order to obtain self-excited oscillation of light in an optical resonant cavity, the gain obtained by making the light go back and forth in the cavity at least can compensate for the loss in propagation. Traditional lasers generally use semiconductor materials and other "gain media" (such as gallium arsenide) to generate a focused beam, which is a coherent beam. The so-called correlated beams are two beams with the same vibration direction, the same vibration frequency, the same phase, or the same phase difference. Such two beams of green laser pointer light will interfere in the area where it meets.
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The working principle of the anti-laser is exactly the opposite of that of the laser. The anti-green laser pointer is a device that can absorb a beam of a specific frequency instead of releasing it. The incident beams entering the anti-laser can interfere with each other and eventually cancel each other out. In this process, light can be converted into heat and released. And this process generally requires the participation of lossy media, such as silicon can be used as this kind of lossy media. The loss medium of the anti-laser is relative to the gain medium of the laser. The concept of anti-laser was proposed by theorists at Yale University. Stone came up with this concept when he introduced the complex physics behind the laser to a visiting scholar. He also suggested that his colleagues help him think about the principle of laser reverse action in order to have a clearer understanding of the working principle of traditional lasers. At the same time, he also began to think about whether he could develop a device that worked against the principle of lasers.
2020-08-05 07:06:05
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