Small-size frequency doubling green light optical fiber laser
A fiber laser and laser technology, applied in the field of lasers, can solve problems such as laser speckle, affecting high-quality user experience, and narrow gain bandwidth
Inactive Publication Date: 2014-12-24
合肥恒锐光电科技有限公司
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[0002] Small green lasers with high efficiency and high beam quality are in great demand in many fields such as industrial processing, laser display, medical treatment, and underwater communications. Generally, green lasers are realized by frequency-doubling neodymium-doped solid-state lasers inside or outside the cavity. Most solid-state lasers contain spatial coupling devices, so there are disadvantages such as poor anti-interference performance, and the gain bandwidth of the bulk neodymium-doped gain medium (Nd:YAG, Nd:YVO4) in the 1μm band is very narrow (<1nm), resulting in output The linewidth of the green frequency-doubled laser is below 1nm, and the laser speckle caused by high coherence in the lighting system is very serious, especially in the laser display, the laser speckle will seriously affect the user's high-quality experience of the laser display
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[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, but should not limit the protection scope of the present invention.
[0018] A small frequency-doubled green fiber laser, characterized in that the laser consists of a semiconductor saturable absorbing mirror SESAM1, a pump light stripper 2, a double-clad ytterbium-doped fiber 3, a pump combiner 4, a PPLN crystal 5, a broadband Composed of fiber grating 6 and fiber collimator 7, wherein the input end of pump beam combiner 4 gathers a plurality of pump light sources together to form one output, and the output end of pump beam combiner 4 is connected with double-clad ytterbium-doped optical fiber One end of 3 is connected to each other, and the pumping light collected by the pumping beam combiner 4 enters the double-clad ytterbium-doped optical fiber 3 through the output end of the pumping beam combiner 4, and the double-clad ytterbium-doped optical fiber 3 ...
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The invention discloses a small-size frequency doubling green light optical fiber laser. The small-size frequency doubling green light optical fiber laser comprises a semiconductor saturable absorber mirror (SESAM), a pump light stripper, a double-cladding ytterbium-doped optical fiber, a pump combiner, a quasi-phase matching PPLN crystal, a broadband fiber bragg grating and an optical fiber collimator. The PPLN crystal is a waveguide device packaged by a temperature controller. According to the optical fiber laser of a full-waveguide structure, efficient lasers with the bandwidth central wavelength of 532 nm can be obtained based on the intracavity frequency doubling technology. The optical fiber laser is miniaturized, compact in structure, high in stability, high in frequency doubling efficiency and suitable for being applied to the application fields of laser projection machines and the like.
Description
technical field [0001] The invention relates to the field of lasers, in particular to a small frequency-doubled green fiber laser. Background technique [0002] Small green lasers with high efficiency and high beam quality are in great demand in many fields such as industrial processing, laser display, medical treatment, and underwater communications. Generally, green lasers are realized by frequency-doubling neodymium-doped solid-state lasers inside or outside the cavity. Most solid-state lasers contain spatial coupling devices, so there are disadvantages such as poor anti-interference performance, and the gain bandwidth of the bulk neodymium-doped gain medium (Nd:YAG, Nd:YVO4) in the 1μm band is very narrow (<1nm), resulting in output The linewidth of the green frequency-doubled laser is below 1nm, and the laser speckle caused by high coherence in the lighting system is very serious, especially in the laser display, the laser speckle will seriously affect the high-quali...
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Login to View More IPC IPC(8): H01S3/109H01S3/067
Inventor 顾春许立新张万兵
Owner 合肥恒锐光电科技有限公司