A method for setting a prism for separating mixed-wavelength laser light

Abstract

The invention discloses a setting method for a prism for separating laser light with mixed wavelengths. The setting method comprises the following steps: three optical surfaces of the prism are respectively a first surface, a second surface and a third surface; the first surface and the second surface form an included angle alpha, incident light enters the prism after being refracted via the first surface, the incident light comprises light a and light b, light a is fully reflected on the second surface and is refracted out from a system via the third surface, light b is refracted and reflected on the second surface, refracted light is directly refracted outward from the second surface, and reflected light is emitted out from the prism after being refracted on the third surface. Based on the above mode, via the setting method for the prism for separating laser light with mixed wavelengths described in the invention, laser light with a plurality kinds of wavelengths can be effectively separated via the set prism, relative strength of light with different wavelengths can be changed, and interference caused by non-object light can be lowered during subsequent research or monochromatic light utilization processes.

Description

technical field [0001] The invention relates to the field of light splitting devices, in particular to a method for setting a prism used to separate mixed-wavelength laser light. Background technique [0002] In an optical system, it is often necessary to separate multi-wavelength mixed laser light, or to separate one or more wavelengths of polychromatic light in order to obtain monochromatic light. [0003] Especially in frequency-doubled or sum-frequency laser systems, the short-wavelength laser power generated by nonlinear conversion is often much smaller than the fundamental-frequency long-wavelength laser, so it is necessary to effectively separate the frequency-doubled or sum-frequency generated laser from the high-power fundamental-frequency laser . [0004] The traditional dispersion prism only uses the dispersion phenomenon when the light of different wavelengths passes through the same medium, so as to separate the light of different wavelengths. Usually, the ligh...

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Problems solved by technology

[0004] The traditional dispersion prism only uses the dispersion phenomenon when the light of different wavelengths passes through the same medium, so as to separate the light of different wavelengths. Usually, the light of different wavelengths exits from the same surface of the prism after the light of different wavelengths is separated. , compared with the incident light, the relative intensity of the outgoing light of different wavelengths does not change much, which will make the follow-up research or the use of monochromatic light strongly interfered by non-target light

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