Frequency-selective 355nm UV laser in a fiber end-pumped Brewster's angle cavity

A technology for ultraviolet lasers and fiber end faces, applied in lasers, laser components, phonon exciters, etc., can solve the problems of nonlinear crystal conversion efficiency easily affected by temperature changes, poor laser processing effect, and unstable laser power. , to achieve the effect of ensuring single-frequency laser output, improving electro-optic conversion efficiency, improving stability and service life

CN104716554BActive Publication Date: 2018-10-02WUXI QINGYUAN LASER TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-10-02

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Abstract

The invention relates to a frequency-selective 355nm ultraviolet laser in a Brewster angle cavity pumped by an optical fiber end face. The 808nm semiconductor laser generates the pump laser and focuses it into the coupling head through the 808nm export fiber; the focused 808nm pump laser enters the plano-convex resonator through the plano-convex front mirror; excites the YVO4 crystal to generate 1064nm laser; the 1064nm laser is in the plano-convex resonator Continuously excited and oscillated inside to generate a mixed laser, the mixed laser is emitted from the Brewster angle of the triple frequency LBO crystal, and is divided into beams with different deflection angles, among which the 355nm laser enters the power attenuator after being filtered by the substrate, and enters the expansion Beam mirror, after adjusting the spot diameter and divergence angle, output through the output window mirror. The non-355nm garbage light enters the garbage light recycling bin through the turning prism. The invention has ingenious structure and reasonable design, can keep the temperature of each module inside the laser constant, and stabilize the output power and optical quality of the laser.
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Description

technical field technical field

[0001] The invention relates to an ultraviolet laser, in particular to a frequency-selective 355nm ultraviolet laser in a Brewster angle cavity pumped by an optical fiber end face, and belongs to the technical field of ultraviolet light generating devices. Background technique

[0002] Laser is one of the major inventions in modern science and technology. Among them, the application value of 355nm ultraviolet laser in non-metal and precision processing is particularly prominent. The global demand for high-quality cold light source lasers is increasing, and the application fields are expanding. Obtaining an ultraviolet laser with excellent beam quality, single frequency, and long-term stable operation is of great significance to the precision processing industry and non-metal processing industry. Starting from the development of the laser industry and economic benefits, it is also the general trend.

[0003] Ultraviolet laser is a short-wav...

Examples

Embodiment Construction

[0025] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0026] As shown in the figure: the frequency-selective 355nm ultraviolet laser in the fiber end-pumped Brewster angle cavity in the embodiment is mainly composed of the laser power interface (1) installed in the laser housing (41), the control signal aviation plug ( 2), water inlet (3), water outlet (4), 808nm semiconductor laser (5), Q switch driver (6), electrical transition terminal (7), laser indicator red light generator (8), 808nm output fiber ( 9), rear mirror (10), coupling head (11), triple frequency LBO crystal (12), plano-convex front mirror (13), YVO4 crystal (14), acousto-optic Q switch (15), anti-torque force Anchor (16), turning mirror (17), garbage light recycling station (18), substrate (19), power attenuator (20), beam expander (21), output window mirror (22), turning prism ( 24), desiccant isolation plate (25), triple frequency LBO crystal T...