Cross-polarization output laser

Abstract

The invention discloses a cross-polarization output laser which comprises a pumping source, a pumping coupling system, a resonant cavity reflector, a first laser gain medium, a second laser gain medium, a laser output mirror and a wave wafer which are arranged in sequence. The first laser gain medium and the second laser gain medium are birefringent laser crystals of the same kind and capable of generating the linearly polarized laser, and the light transmission directions of the first laser gain medium and the second laser gain medium are the same in a crystal axis coordinate system but not the crystal optical axis direction. The second laser gain medium is placed by rotating by 90 degrees relative to the first laser gain medium by taking the light transmission direction as an axis. Sincethe polarization directions of the linearly polarized lasers generated by the first laser gain medium and the second laser gain medium are perpendicular to each other, the laser outputs two beams oflasers which have the same wavelength and are orthogonally linearly polarized.

Description

technical field [0001] The invention relates to the field of solid-state lasers, in particular to a laser whose output laser is orthogonally polarized. Background technique [0002] Polarization is one of the most important properties of laser light. Orthogonal polarization laser means that there are two mutually perpendicular polarization states in the laser, although the characteristics of the orthogonal polarization laser and natural light after passing through the analyzer are the same, such as the transmitted light intensity when the transmission polarization direction of the analyzer is rotated Same, but orthogonally polarized lasers maintain the polarization properties of the laser. When the orthogonally polarized laser passes through the wave plate, the polarization state may change, such as linearly polarized light, circularly polarized light or elliptical polarized light with different polarization directions, while the output of natural light after passing throug...

AI Technical Summary

Problems solved by technology

The problem with this method is that since the two laser beams come from different resonators, there is no correlation between the two, so the control of the longitudinal mode frequency and the pulse time control require a complex additional synchronization system to achieve

[0007] Disadvantages and deficiencies in the existing technology: the existing orthogonally polarized laser implementation scheme has problems such as complex structure, high cost, poor stability and flexibility, etc., and the power ratio and pulse interval of the two polarized lasers generally cannot be adjusted

For orthogonally polarized lasers of the same frequency, it can only be realized by polarization combining of two independent lasers at present, and the synchronization control of time and frequency is very complicated.

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