Device for alternately outputting dual-wavelength Q-switched pulse lasers

Abstract

The invention discloses a device for alternately outputting dual-wavelength Q-switched pulse lasers and belongs to the technical field of lasers. The device is characterized in that a lambda1 laser and a lambda2 laser are formed by respective pumps, total reflection mirrors and laser crystals as well as a common output coupling mirror; a Q-switched prism pair comprises an inhibition prism and a total reflection prism, inclined planes of the inhibition prism and the total reflection prism form an inclined plane group of the Q-switched prism pair, and a piezoelectric ceramic transducer is mounted on the inhibition prism and used for adjusting the interval d between two inclined planes of the inclined plane group; the Q-switched prism pair is located between the laser crystal of the lambda1 laser and the output coupling mirror, and a resonance optical path of the lambda1 laser is perpendicular to a group of right-angled surfaces of the Q-switched prism pair; an optical axis of the lambda2 laser is perpendicular to the other group of right-angled surfaces of the Q-switched prism pair and passes the inclined plane group, and the laser crystal of the lambda2 laser is adjacent to the total reflection prism; a timing power supply containing a timing control circuit is electrically connected with the pumps of the lambda1 laser and the lambda2 laser as well as the piezoelectric ceramic transducer respectively; a beam splitting prism is located on the optical path on the outer side of 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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