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The green laser is used as the recording light to record three holograms at the same time, and then the red, green and blue lasers read out the corresponding holograms respectively, and the three RGB images are synthesized into a three-dimensional color hologram image. At present, three-dimensional color holography technology is used in stereoscopic film, television, exhibition, microscopy, interferometry, projection lithography, military reconnaissance and surveillance, underwater detection, metal interior detection, preservation of precious historical relics, artworks, information storage, Remote sensing, research and recording of transient phenomena with extremely rapid changes in physical state, transient processes (such as explosions and combustion) are widely used. Laser requirements: long coherence/narrow linewidth, high power/frequency/pointing stability. Common wavelengths: 405nm, 457nm, 473nm, 532nm, 589nm, 639nm, 660nm, 671nm, RGB combined light, etc.
Ultraviolet lasers and deep ultraviolet lasers have a wide range of applications in military, industry, medicine, printing, etc. Using green light as a pump source is the most effective and widely used method to generate ultraviolet and deep ultraviolet lasers. The LD-pumped solid-state laser can be used as the pump source of the femtosecond laser. For example, the green laser is used as the pump source to pump Ti:Al2O crystals to generate femtosecond pulses. In addition, the green laser can also be used as the pump source of the parametric LD-pumped all-solid-state continuous green laser oscillator. In addition, all-solid-state green lasers are also widely used in optical storage, information processing, laser spectroscopy and holography, coherent communication, laser entertainment, lidar, interferometry, optical data storage, military industry and other fields. Therefore, all-solid-state green lasers have very important scientific research value and broad application prospects. [1] The first all-solid-state miniaturized green light device was obtained by frequency doubling of Nd:YAG and barium sodium niobate crystals pumped by linear light-emitting diodes, with a repetition rate of 100 Hz and an average power of 2 mW.
Because of its high power, the pulsed green laser has a relatively short action time on the skin, so that the laser will not produce non-selective heating of the skin tissue around the target tissue, so that it will not cause thermal damage and reduce the risk of surgery. Compared with other display light sources, laser display technology has unique advantages such as wide color gamut, high color purity, flexible and variable display size, and no harmful electromagnetic radiation. It has become the preferred video display device for home and outdoor future in many fields such as screens, teaching demonstrations, and virtual reality simulations. The image displayed by the laser is richer and brighter than the existing color TV, which can reflect the real color of nature and even display the virtual color. A major development direction in the field of laser research.
