Double-channel second-order nonlinear optical test system
A second-order nonlinear and optical testing technology, applied in the field of spectroscopic instruments, can solve problems such as bulky, difficult to move, and complex structures
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Embodiment 1
[0021] Embodiment 1: When this dual-channel second-order nonlinear optical testing system is used as the second-order nonlinear optical test of the 1 micron wave band, then in the accompanying drawings, the laser light source (1) is a pulsed laser of the 1 micron wave band, such as 1064nm Q-switching Pulsed laser light; the light-transmitting sheet (2) is a narrow-band filter that transmits a 1-micron band, or an infrared filter is used instead; the sample holder (3) is placed at the front focus of the focusing lens (4), and the first photomultiplier The photon-receiving surfaces of the tube (7) and the second photomultiplier tube (9) are respectively placed at the focus of the focusing lens (4) after being reflected and transmitted by the beam splitter (5); the first optical filter (6) is plated High anti-dielectric film (reflectivity R > 99.9%) that can reflect the 1 micron wave band, and pass through other wavelengths, or use heat-insulating glass instead; the second filter ...
Embodiment 2
[0022] Embodiment 2: When this dual-channel second-order nonlinear optical test system is used as the second-order nonlinear optical test of the 2-micron waveband, then in the accompanying drawings, the laser light source (1) is a pulsed laser of the 2-micron waveband, such as 1997nm Q-switched pulsed laser light; the light-transmitting sheet (2) is a narrow-band optical filter that transmits a 2-micron band; the sample holder (3) is placed at the front focal point of the focusing lens (4), and the first photomultiplier tube (7) and the second photoelectric The photon receiving surface of the multiplier tube (9) is respectively placed at the focus of the focus lens (4) after reflection and transmission by the beam splitter (5); Dielectric film (reflectivity R>99.9%), then pass through to other wavelengths; The second optical filter (8) is the narrow-band optical filter (reflectivity R<50%) of doubled frequency light 1000nm; Beam splitter (5) Coated with 1000nm band 45 ° semi-t...
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