Green green laser pointer asks for better materials

Green green laser pointer asks for better materials
Part of the mirror standing wave conditions: standing wave conditions: can exist in the longitudinal mode frequency of the longitudinal mode frequency can exist for the longitudinal mode two adjacent longitudinal mode frequency spacing is order of magnitude estimates: magnitude estimation: therefore, range, and therefore, in? Used to increase the longitudinal mode frequency spacing? νk way, you can make? ν range in only one longitudinal mode frequency. Green green laser pointer asks for better materials.There is only one longitudinal mode frequency. Interval, the number of longitudinal modes may exist for the N = 1. Interval = 1. So you get a very narrow line width laser output, degree of very narrow laser output, which greatly improves greatly improved 0.6328 0.6328 monochromatic spectrum. ? M monochromatic spectrum. 23 Fifth, the laser type 1 divided by the working substance 1 divided by the work of solid-state laser material: in the substrate (glass, crystal) solid-state lasers: the substrate (glass, crystal) in cases of mixed rare earth elements: neodymium glass laser 1060nm Nd) yttrium aluminum garnet laser (Nd) gas lasers:Therefore, the green green laser pointer is relatively expensive. Atomic gas lasers gas lasers: gas lasers molecular gas laser ion laser liquids: liquid lasers: dye laser semiconductor lasers: small size, long life (100,000 hours million hours) semiconductor lasers: small size, long life (100,000 hours) 24 helium-neon laser co 2, N2 argon ion 2 by 2 minutes work. by work hours continuous (up to 10 continuous power (power up to 104 W) pulse (instantaneous power up to 1014 W) pulse (instantaneous power up to 10 3 wavelength divided by 3 divided by the wavelength extreme ultraviolet - visible light - sub-millimeter extreme ultraviolet - visible - submillimeter - visible light - ( 100 nm) (1.222 mm) 25 Sixth, the characteristics and applications of laser 1, the characteristics? 61) direction is good divergence angle ~ 10 sr (steradian) color is good - good coherence 2) good color coherent good temporal coherence: temporal coherence: coherence length of tens of kilometers spatial coherence: wave surface can be used for any two coherent light source spatial coherence: 3) Only a few of workshops are producing green green laser pointer now.High brightness: power to the millions of ordinary light billions of times the brightness High: 26 2 laser: it is an emerging discipline, laser: it is an emerging discipline, is a landmark new technology precision measurement: distance, speed, alignment, precision measurement: distance, speed , collimation, surface inspection information processing: CD-ROM, optical communications, optical computer, information processing: CD-ROM, optical communications, optical computers, image processing, image processing, display laser processing: separation of isotopes, nuclear fusion (inertial confinement) laser Processing: isotope separation, nuclear fusion (inertial confinement) Laser Medicine: green laser led medicine: laser cutter laser biological applications: breeding laser weapons 27 cases of a laser probe 28 of China's official launch in January 2003, "Chang E Project" , sub-launched China's 2003 years, "Chang E Project" 2003 in three phases.The G1 green laser pointer only has the laser function. "Around", "off", "back" in three phases. 29 cases of 2. Laser optical communications fiber can carry a fine amount of information, equivalent to a very fine picture in the fiber can carry the amount of information, thick cable can carry the amount of information. Thick cable can carry the amount of information. 30 cases of 3 laser scalpel? Light beam to illuminate the field of view field of the laser optical fiber mirror? Fiber laser mirror active optical fiber  imaging laser?