Novel single-frequency pulse ultraviolet light source on basis of 978nm single-frequency pulse optical fiber laser

Abstract

The invention discloses a novel single-frequency pulse ultraviolet light source on the basis of 978nm single-frequency pulse optical fiber laser, which is characterized by comprising a linear polarization single-frequency Q-switched pulse 978nm all-optical-fiber laser 1, a collimator 2, a first frequency doubling system 3 and a second frequency doubling system 4, wherein 978nm single-frequency pulse optical fiber laser is collimated and output at the signal end of the linear polarization single-frequency Q-switched pulse 978nm all-optical-fiber laser 1 by the collimator 2 and then single-frequency pulse ultraviolet light is output by the first frequency doubling system 3 and the second frequency doubling system 4. According to the invention, on the basis of the single-frequency pulse all-optical-fiber laser, the 978nm single-frequency pulse light output by the single-frequency pulse all-optical-fiber laser is subjected to frequency doubling for twice and generation of the single-frequency pulse ultraviolet light is implemented; and the novel single-frequency pulse ultraviolet light source has important application value in the fields of molecules, atom detection, laser spectroscopy, laser chemistry and biomedicine.

Description

technical field [0001] The invention relates to a blue light source, in particular to a novel single-frequency pulse blue light source based on 978 nm single-frequency pulse fiber laser, which belongs to the field of optical fiber and laser technology. Background technique [0002] The Q-switched laser increases the laser oscillation threshold by inserting a loss device in the laser cavity, and cannot form laser oscillation in a low-Q state. Due to the existence of pump light, the laser medium is in the state of particle population inversion. When the loss device reduces the loss instantaneously, the threshold in the cavity decreases, and it is in a state of high Q value instantaneously. It reaches the oscillation threshold in a short time and forms a laser pulse output. Fiber Q-switched lasers have the distinctive features of low energy consumption, long life, high stability, good beam quality, compact structure, high energy conversion efficiency, and no need for optical pa...

AI Technical Summary

Problems solved by technology

For semiconductor laser diodes (LDs) in the visible band, the development of blue LDs requires expensive equipment and substrate materials. At the same time, the beam quality of LDs is not satisfactory, which is limited in many application fields.

The frequency-doubled solid-state laser pumped by LD requires nonlinear crystal materials for frequency conversion. Although the beam quality is good and the output power is high, the system is more complicated

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