An ld-pumped high-power Kerr lens self-mode-locked laser

Abstract

The invention belongs to the technical field of diode-laser-pumped ultrafast laser and discloses an LD-pumped high-power Kerr lens self-locking mode laser. The LD-pumped high-power Kerr lens self-locking mode laser comprises an LD pump source. Laser emitted from the pump source passes through a collimation focusing lens, and then, is incident to a Yb laser crystal; after starting of oscillation ofgain laser, the laser is incident to a second concave mirror, and is reflected by the second concave mirror, a first GTI mirror, a second GTI mirror and a third concave mirror in sequence; the laseris incident to a fourth concave mirror after passing through a Kerr medium in Brewster angle arrangement; the fourth concave mirror reflects the laser to a plane reflector mirror; the plane reflectormirror reflects the laser and enables the laser to return by the same way to reach a dichroic mirror, and the laser is reflected by the dichroic mirror and the first concave mirror; and the laser reaches an output mirror through a smaller hole. The LD-pumped high-power Kerr lens self-locking mode all-solid-state laser is realized for the first time, and output of ultra-short laser pulses, of whichthe pulse width is smaller than 100fs and average power is larger than 1 W, is obtained; and compared with the prior art, the output power of the laser is improved greatly.

Description

technical field [0001] The invention belongs to the field of ultrafast laser technology pumped by LD (Laser Diode, laser diode), in particular to a high-power Kerr lens self-mode-locked laser pumped by LD. Background technique [0002] The pursuit of shorter pulse widths has been a goal that people have been striving for since the inception of lasers. The ultra-short pulse width makes fast time resolution possible. Similar to a flashlight capturing high-speed action, an ultra-short pulse laser can also "freeze" ultra-fast moving objects such as molecules or electrons, so it can probe chemical reaction kinetics and high-speed Electro-optic sampling of moving electrons. Using ultrashort pulse lasers, molecular decomposition dynamics and more complex chemical reaction kinetics can be observed. At the same time, the ultra-short pulse width in the time domain corresponds to the broadband spectrum in the frequency domain, making finer spatial resolution possible. In 1991, D.E.S...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problem existing in the existing technology is: sub-100fs ultrashort pulse generation often needs to use the Kerr lens mode-locking technology to achieve, and the Kerr lens mode-locking requires a high-brightness single transverse mode pump source to introduce Soft Edge Stop

However, the maximum output power of single transverse mode LD lasers currently on the market is only 1W, which greatly limits the output power of Kerr lens mode-locking.

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