Cross-polarization dual laser

Abstract

The invention provides a cross-polarization dual laser, which is characterized in that isotropous neodymium-doped laser crystals with a multi-channel transition property is adopted, and a continuous, pulse or pulse repetition rate laser which is used for realizing mutually orthorhombic dual-wavelength lasers with horizontally-polarized wavelength I and vertically-polarized wavelength II in two polarization directions is adopted, belonging to a novel laser. The laser comprises the isotropous neodymium-doped laser crystals such as Nd: YAG or Nd: GGG and other crystals, a pumping system which is used for pumping the laser crystals so as to enable active ions (Nd3<+>irons) in the laser crystals to form distribution for population inversion, an optical resonant cavity for radiating the horizontally-polarized wavelength I and the vertically-polarized wavelength II of active ions through transition emission therein for resonance, and a cooling system of a laser device. Finally, the cross-polarization dual wavelength lasers with the horizontally-polarized wavelength I and the vertically-polarized wavelength II are output by the same output coupling mirror in the same optical path simultaneously. The cross-polarization dual laser provides a novel laser light source which is a new technical way to acquire high-power high-coherence sum frequency or difference frequency (THz radiation waves) lasers, can be used to widen applications of dual wavelength lasers and has widely application prospects and use value in the fields of nonlinear frequency conversion, fiber-optical 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 the fields of nonlinear frequency conversion, laser radar, satellite ranging, environmental monitoring, photodynamic medical treatment, optical fiber communication, and spectroscopy research, especially in nonlinear frequency conversion. The sum frequency or difference frequency of dual-wavelength lasers has become an important technical way to obtain new wavelength lasers with special purposes. For example, using 1-micron and 1.3-micron dual-wavelength lasers to produce yellow light and orange light through the sum frequency, if dual wavelengths with similar wavelengths are used The laser can also obtain coherent THz radiation waves through difference f...

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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