Semiconductor laser pumping all-solid-state complex cavity and frequency laser
A laser-pumped, all-solid-state technology, applied in the laser field, can solve problems such as unfavorable industrialization, large loss, and reduced sum-frequency efficiency, achieve high pump efficiency and output power, fully overlap the fundamental frequency beam, and reduce insertion The effect of loss
Inactive Publication Date: 2006-02-08
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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[0005] The main problems of this sum-frequency laser are: the energy conversion efficiency of lamp pumping is low, and the cemented prism as a beam combiner not only causes a large loss, but also the 45° incidence of the fundamental frequency light will change its beam quality, which will reduce the sum-frequency efficiency; Using an output coupling cavity mirror 5, the quality and overlap of the two fundamental frequency beams are required to be optimal at the same time during the adjustment process of the resonator, making installation and adjustment difficult, and the movement of an output coupling cavity mirror will cause two fundamental frequency beams Quality changes, which also greatly affects the stability of the laser, which is not conducive to industrialization
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[0012] The invention according to figure 2 The structure shown is implemented, wherein the pumping sources 10 and 18 are semiconductor lasers with an emission wavelength of 808nm or their arrays, the optical coupling systems 11 and 19 are optical fibers with a core diameter of 400 μm, and the reflective cavity mirrors 12 and 20 are K9 optics with a diameter of φ6mm. Glass, a plano-concave lens with a radius of curvature of 200mm, and the laser gain medium 13 is made of neodymium-doped yttrium vanadate (Nd:YVO 4 ), the laser gain medium 21 adopts neodymium-doped yttrium aluminum stone (Nd:YAG), the beam combiner 14 adopts φ8mm, K9 optical glass, a plane mirror, and the output coupling cavity mirrors 16 and 17 adopt K9 optical glass and a plane mirror of φ6mm, The nonlinear sum frequency crystal 15 adopts LBO or KTP.
[0013] The concave surface of the reflective cavity mirror 12 is prepared with a reflectivity of greater than 99.5% for a wavelength of 1342nm, and a multilayer...
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Disclosed is a semiconductor laser pumping full solid combination cavity mixing laser. The inventive summing laser comprises: along the pumping laser beam transmission direction, from left to right are placed light coupling system, reflecting cavity mirror, laser gain medium, light combination mirror, frequency mixing crystal, and two output coupling cavity mirror; the normal of light combination mirror forms a ª’ degree angle with system's light axial, the reflecting cavity mirror and the other output coupling cavity mirror form a sub resonant cavity; on the left side of light combination mirror's normal line is equipped the other arm light path, the light axial pointing to the centre of the light combination mirror; along the pumping laser beam transmission direction, from right to left are placed light coupling system, reflecting cavity mirror, laser gain medium and light combination mirror; the reflecting cavity mirror, light combination mirror and the pre-output coupling cavity mirror of previous light path form the other sub resonant cavity. The related components are required to be coated with high reflecting coating or high antireflection coating for base frequency light and mixing laser.
Description
technical field [0001] The invention belongs to the field of laser technology, and relates to a semiconductor laser pumping solid-state laser with a novel composite cavity structure for obtaining sum-frequency laser output. technical background [0002] The semiconductor laser or semiconductor laser array is used as the pump source to focus from the end face, close-coupled or fiber-coupled into the laser gain medium, which can achieve a good match with the fundamental frequency optical mode excited in the cavity. Lasers with other wavelengths can be obtained through nonlinear optical mixing effects such as intracavity frequency doubling, sum frequency, and difference frequency. [0003] At present, the main application of semiconductor laser-pumped intracavity mixing lasers is intracavity frequency-doubling lasers. If the two fundamental frequency lights involved in frequency conversion have different wavelengths, choose a nonlinear crystal cut at a certain angle and place i...
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IPC IPC(8): H01S3/0941H01S3/05H01S3/16
Inventor 吕彦飞檀慧明
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI