The green laser pointer is portable

The green laser pointer is portable
Modern high-power fiber laser pump source is a high-power multimode diode, with a heart around the single-mode double-clad fiber to achieve. In the 1970s, with a single-mode fiber lasers to replace solid-state lasers or broadband multi-mode semiconductor laser diode emission output of the idea was first proposed. In a simple double-clad fiber structure, a single-mode glass fiber axial heart was mixed with the laser ion one would expect, such as rubidium, bait, Yi, thulium and so on.People can control the green laser pointer in all directions without any restriction in directivity. Fiber core diameter several times by a layer of doped glass, it is not surrounded by cladding with a lower refractive index. Next is the internal pump cladding, outer layer is also doped glass cladding is not covered, also has a lower refractive index. In this fiber structure, diode-pumped multimode optical fiber end by a composite surface injection pump cladding, transmitted through the fiber structure, periodically through the doped core single-mode optical fiber and fiber produced in the core population inversion. IPG Laser Department (now a branch IPG Photonics) developed a more advanced full-reinforcement parallel side-pumped fiber laser.So this green laser pointer is more popular with users. It consists of an active fiber, this fiber has other optical components can be free or fused gain stage of the polyhedron structure, so that the pump light from a multi-point injection-clad possible. Thus, a simple optical output power scaling control has become feasible. The other side of the pump technology include V groove coupling. In 1996, with the industrial quality of the diffraction limit of 10 watts cladding-pumped fiber laser market by the IPG Photonics. Polaroid Corporation (Cambridge, MA), Spectra Diode Laboratories (now JDS Uniphase) and Spectra Physics soon introduce a similar laser.The green laser pointer is portable to be carried with for you can put it in your bag or even pocket. More than 100 watt-level fiber-coupled laser output power can be a good upgrade fiber laser output power to a higher level. For example, seven 100-watt-level fiber laser output beam through the seven single-mode fiber transmission distance of 30 meters, then in a multi-core optical fiber coupler was synthesized beam, the output with a diameter of 80 m, divergence angle less than 40 mrad of the beam. This is equivalent to an output beam parameters <1.6 mm mrad laser; 700 watts of output power can be coupled to the green laser led beam strong effect on the workpiece, each square centimeter of up to more than 50 kilowatts of power. In comparison, a typical diode-pumped solid-state laser beam parameters> 10mm mrad, the output power density is only one fiber laser 50. 700-watt-level fiber laser size is 55 × 60 × 95cm3, weighs 120 kg. This form of laser power according to need, the longer fibers, which can achieve very high power. But it has a fatal weakness is the single pulse energy is not high, which makes fiber laser applications has been somewhat restricted. The one-piece design of green laser pointer would not influence the exterior condition and make it difficult to lose it as well.Currently, every country how to improve the fiber laser pulse energy as a key development issue. Summary This article focuses on experimental setup and the principle point of view, describes the emergence in recent years, several semiconductor-pumped solid-state laser core components - the technical characteristics of the laser head. High power, high brightness DPSSL laser field has been the forefront of domestic and international issues. Currently, foreign-kilowatt system DPSSL been many reports, Japan is also expected in 2005, the average output power ≥ 10KW, electro-optical efficiency of ≥ 20% the size of ≤ 0.05m3 laser high-power solid-state lasers.