Small-size frequency doubling green light optical fiber laser

Abstract

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...

AI Technical Summary

Problems solved by technology

[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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