Self-stimulated Raman scattering laser of In-Band pump
A stimulated Raman scattering, in-band technology, applied in the field of lasers, can solve problems such as slope efficiency reduction, power reduction, and inability to fundamentally solve problems, and achieve the effect of improving beam quality, reducing thermal effects, and improving efficiency
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[0013] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0014] As shown in Fig. 2(a) and Fig. 2(b), the pump source 1 is adopted, and its central wavelength is 914nm, which can also be 912nm, 938nm or 946nm. Set at 25°C, the laser pump source 1 works in continuous, modulated or pulsed mode, passes through an energy-transmitting fiber 2 with a diameter of 400 microns, and a numerical aperture of 0.22, and transmits the pump light to the collimation focusing system Above, the collimating and focusing system consists of a first plano-convex mirror 3 and a second plano-convex mirror 4, both of which have a focal length of 25mm, and a 1:1 imaging system is formed by the first plano-convex mirror 3 and the second plano-convex mirror 4, Focus the pump light onto the laser crystal 6, the focused spot radius is 200 microns, and the laser gain medium crystal 6 is Nd:YVO 4 , the doping concentration...
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