A device for alternately outputting dual-wavelength Q-switched pulsed laser

Abstract

A device for alternately outputting dual-wavelength Q-switched pulse lasers belongs to the technical field of lasers. It is characterized in that the λ1 laser and the λ2 laser are composed of respective pumps, total reflection mirrors, laser crystals and a common output coupling mirror; the Q-switched prism pair is composed of a suppression prism and a total reflection prism, and the slope of the suppression prism and the total reflection prism The slopes of the Q-switching prisms constitute the pair of slopes, and the piezoelectric ceramic transducer is installed on the suppression prism to adjust the distance d between the two slopes in the slope group; the Q-switching prism is located between the laser crystal of the λ1 laser and the output coupling mirror. The resonant optical path of the λ1 laser is perpendicular to a set of right-angled surfaces of the Q-switched prism pair; the optical axis of the λ2 laser is perpendicular to the other set of right-angled surfaces of the Q-switched prism pair, and after passing through the set of inclined surfaces, the laser crystal of the λ2 laser and the total reflection The prisms are adjacent; the timing power supply containing the timing control circuit is electrically connected to the respective pumps and piezoelectric ceramic transducers of the λ1 laser and the λ2 laser; the beam splitting prism is located on the optical path outside the output coupling mirror.

Description

technical field [0001] The invention relates to a device for alternately outputting dual-wavelength Q-switched pulsed lasers. Piezoelectric ceramics control the distance between slopes of a pair of prisms to realize alternate output of pulsed lasers with two wavelengths such as 1064nm and 946nm, belonging to the field of laser technology. Background technique [0002] Multi-wavelength lasers not only have important applications in laser medical treatment, precision spectrum analysis, laser radar and other fields, but also have more significance in nonlinear optical mixing, because the multi-wavelength laser includes frequency doubling, sum frequency and difference frequency The nonlinear frequency mixing inside can obtain light in some special bands, such as the 480-520nm band, which is the same as the emission band of the argon ion laser, and can be used as the pump source of the Pr-doped laser crystal to solve the problem of the Pr-doped laser Pumping problems; Another exa...

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Problems solved by technology

[0004] There are following deficiencies in described known technology: one, because the emission cross section of Nd:YAG laser crystal at 1064nm place is 4.6 * 10 -19 cm 2 , the emission cross section at 946nm is 4×10 -20 cm 2 , the difference between the two emission cross-sections is more than 10 times, which will lead to a very fierce gain competition between the two transition lines of 1064nm and 946nm, and it is difficult to output stable dual-wavelength laser oscillation; second, 1064nm and 946nm dual-wavelength pulsed laser It is output at the same time, but it cannot meet the requirements for the alternate optical output required for temperature field detection and laser processing. In addition, there is also a waste of optical power in this case

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