Novel orthogonal-polarization dual-wavelength laser

Abstract

The invention discloses a novel orthogonal-polarization dual-wavelength laser which belongs to a novel laser and is a dual-wavelength continuous pulse laser or a dual-wavelength repetition-rate pulse laser realizing mutual orthogonality of a horizontal polarized wavelength 1 and a vertical polarized wavelength 2 in polarization directions by adopting an anisotropic neodymium-doped laser crystal with a multichannel transition property. The laser device comprises the anisotropic neodymium-doped laser crystal, such as Nd:YAlO3, Nd:YVO4, Nd:YLF or Nd:GdVO4 and other crystals, a pumping system and an optical resonant cavity, wherein the pumping system is used for pumping the laser crystal to enable active ions (Nd<3+> ions) in the laser crystal to form distribution for population inversion; the optical resonant cavity is used for the resonation of dual-wavelength radiation of the horizontal polarized wavelength 1 and the vertical polarized wavelength 2 of the active ions in transmission emission; and finally, orthogonal-polarization dual-wavelength laser of the horizontal polarized wavelength 1 and the vertical polarized wavelength 2 are simultaneously outputted in the same light path both by the same output coupling mirror. The orthogonal-polarization dual-wavelength laser provides a novel laser source and a novel technical approach to acquisition of high-power, high-coherence or difference-frequency (THz radiation waves) laser, can broaden the application of dual-wavelength laser, and has a broad application prospect and use values in the fields of non-linearity frequency conversion, fiber-optic communication and the like.

Description

technical field [0001] The invention relates to a novel solid-state dual-wavelength laser capable of outputting dual-wavelength lasers with two polarization states orthogonal to each other, belonging to the field of optoelectronic devices. Background technique [0002] Solid-state dual-wavelength lasers can be widely used in nonlinear frequency conversion, laser radar, satellite ranging, environmental monitoring, photodynamic medical treatment, and spectroscopy research, especially in nonlinear frequency conversion. In recent years, solid-state dual-wavelength lasers have been used Performing sum frequency or difference frequency has become an important technical way to obtain new wavelength lasers with special purposes, such as using 1 micron and 1.3 micron dual-wavelength lasers to produce yellow light and orange light through the sum frequency; Frequency technology can also obtain coherent THz radiation waves. Therefore, the research of solid-state dual-wavelength laser ...

AI Technical Summary

Problems solved by technology

However, the dual-frequency laser is essentially two split frequency modes of the same laser radiation wavelength. Limited by the gain linewidth, the frequency difference of the orthogonally polarized dual-frequency laser obtained by this method can only reach at most the gain linewidth of the solid-state laser. limit

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