Large-divergence-angle laser coupling single-mode optical fiber device and method
A single-mode optical fiber and large divergence technology, applied in the field of optical fiber, can solve the problems of inability to use laser, waste of equipment, and extremely high processing requirements
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[0032] Such as Figure 1 to Figure 5 As shown, the present invention will be described in more detail below in conjunction with the accompanying drawings.
[0033] Such as figure 1 The laser 1 to be coupled into the fiber is shown. The divergence angle of the laser is 2θ, and the dotted line in the figure represents the optical axis.
[0034] Such as figure 2 As shown, the light-emitting surface of the laser 1 is placed on the object focus of the collimator lens 2, and the focal length of the collimator lens 2 is set to f 1 , The RMS value of wave aberration should be less than 1 / 10λ, where λ is the incident light wavelength. In this embodiment, an aspheric lens is used. The clear surface needs to be coated with an anti-reflection coating adapted to the working wavelength, and its effective clear aperture D needs to meet: . After collimation by the collimator lens, the laser becomes parallel light parallel to the optical axis, and the spot diameter d is . In this embodiment, an...
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