Photo crystal frequency doubler with impulse laser linear material
A technology of photonic crystals and linear materials, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of difficult to achieve high-intensity laser output, no complete coverage of laser frequencies, and few nonlinear materials. Conducive to microfabrication, system integration, and reduced machining accuracy requirements
Inactive Publication Date: 2008-07-16
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology
Existing laser frequency doublers are usually made of nonlinear materials. The obvious disadvantage is that there are very few types of nonlinear materials, and a nonlinear material can only work for a specific wavelength of laser light, so it is Complete coverage of laser frequencies has not yet been achieved in the visible light band
At present, there has been a technology that uses the electric quadrupole polarization effect of linear materials to achieve frequency doubling, but this technology is only suitable for continuous beams, and there are certain defects in phase matching and material selection, and it is difficult to achieve high intensity. laser output
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[0014] Such as figure 1 As shown, the present invention is composed of a light wave entrance 1, an exit opening 4, a metal shell 2, an internal crystal 3, and a substrate 5. The laser that needs frequency doubling is injected from the entrance 1, and the frequency is doubled by the internal crystal 3. After frequency doubling The laser is emitted from the exit port 4, and both the pumping wave (incident wave) and the frequency-doubled wave (exiting wave) are pulsed lasers.
[0015] Such as figure 2 Shown is a schematic diagram of the H-H cross-sectional structure of the internal crystal 3 of the embodiment of the present invention, which is composed of a square air hole photonic crystal 6, an air waveguide 10, a grating 7, a square dielectric column 9 and a square dielectric column photonic crystal 8. The unit cell structure of the photonic crystal Both are diagonal compound square unit cell structures, and the square dielectric columns 9 are arranged in rectangles or square...
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The invention comprises port of incident light, metal case, internal crystal, port of emergent light and baseboard. The internal crystal comprises air hole photon crystal, grating, dielectric cylinder crystal, dielectric cylinder and air waveguide. The air hole photon crystal and dielectric photon crystal has band gap structure. The grating, dielectric cylinder, dielectric cylinder photon crystal and base material are made up same non magnet linear material. The dielectric cylinder and air holes are quadratic column structure, and the air hole photon crystal and dielectric cylinder photon crystal is diagonal square complex unit cell structure. The pumping wave and double frequency wave are of pulsed laser.
Description
technical field [0001] The invention relates to a pulse laser linear material photonic crystal frequency multiplier, which belongs to the technical field of laser frequency conversion. Background technique [0002] Laser is widely used in military affairs, scientific research, and daily life, and plays an increasingly important role. However, most of the wavelengths of commonly used lasers are in the near-infrared range, which obviously cannot meet the needs. To generate lasers in other wavelength ranges, currently commonly used technical means include laser frequency doubling, frequency mixing, sum frequency, difference frequency, etc., among which laser frequency doubling is the most. Existing laser frequency doublers are usually made of nonlinear materials. The obvious disadvantage is that there are very few types of nonlinear materials, and a nonlinear material can only work for a specific wavelength of laser light, so it is In the visible light band, complete coverage...
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IPC IPC(8): H01S3/109
Inventor 石建平陈旭南罗先刚
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI