An electro-optic Q-switched dual-wavelength laser alternate coaxial output method and laser

Abstract

The invention discloses an electro-optical Q-switched dual-wavelength laser alternate coaxial output method and a laser. The laser includes: a first pumping source, a first laser gain medium, a first polarizer, a second pumping source, a second Laser gain medium, second polarizer, laser cavity rear cavity mirror, quarter wave plate, prism, electro-optic Q-switched crystal and laser cavity output mirror, when the electro-optic Q-switched crystal is in a pressurized state, output the second wavelength Laser, when the electro-optic Q-switched crystal is in the decompressed state, output the first wavelength laser, periodically pressurize and depress the electro-optic Q-switched crystal, and alternately coaxially output the electro-optic Q-switched dual-wavelength laser. The invention can realize two pulsed laser outputs when a Q-switched pulse signal is applied to the electro-optic Q-switched crystal, and provides an effective way for obtaining high repetition frequency laser.

Description

technical field [0001] The invention relates to the field of solid-state lasers, in particular to an electro-optical Q-switched dual-wavelength laser alternate coaxial output method and a laser. Background technique [0002] Dual-wavelength lasers are widely used in the fields of interference rainbow holography, fine laser spectroscopy, differential absorption lidar, multi-photon step ionization of atoms and molecules, nonlinear frequency conversion, laser medicine, etc., in high-brightness laser color display, laser color printing It has broad application prospects in fields such as equipment and entertainment industry. If the lasers with two wavelengths can be separated in the time domain, then dynamic analysis within a short time interval can be realized in technical fields such as multi-photon ionization of atoms and molecules, laser medicine, and laser spectroscopy. Existing common Q-switched dual-wavelength lasers mainly use a single laser gain medium to obtain simult...

AI Technical Summary

Problems solved by technology

However, this technology has the following deficiencies: first, the laser has two sets of optical tuning components, and the cost is relatively high; second, when the large-injection high-repetition-frequency dual-wavelength laser operates alternately, due to the use of a single gain medium, the self-heating The burden is heavy, which will bring serious thermal lens effect. In addition, each Q-switching needs to pressurize the Q-switching crystal, and the maximum repetition frequency is limited by the Q-switching drive circuit (the current maximum repetition frequency is around 200kHz); 3. , the laser gain medium is limited to be tunable, which will also cause the output wavelength to be limited; Fourth, the maximum difference between the dual-wavelength laser wavelengths is limited by the tuning range of the tunable crystal

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