Yb: LYSO laser for Kerr lens mode self-locking

Abstract

The invention provides a Yb: LYSO laser for Kerr lens mode self-locking. The Yb: LYSO laser is used for outputting lasers with a mode being locked. The Yb: LYSO laser comprises a pumping source, a laser crystal and an optical system, wherein the pumping source is used for providing pumped lasers, the laser crystal is made of a Yb: LYSO material and is used as a gain medium and a Kerr medium, the optical system is composed of a plurality of optical elements, and the optical system can work with the pumping source and the laser crystal according to a Kerr lens mode locking mechanism. The optical system comprises a resonance cavity used for forming a roundtrip optical path for the lasers, and the laser crystal is arranged on the roundtrip optical path. The resonance cavity is provided with a first end mirror which is arranged at the first end of the roundtrip optical path and used for reflecting the lasers. The first end mirror is a semiconductor saturable absorption mirror and is used for starting and stabilizing Kerr lens mode locking. According to the Yb: LYSO laser for Kerr lens mode self-locking, the semiconductor saturable absorption mirror is used for assisting in mode locking, Kerr lens self-starting mode locking is achieved on the Yb: LYSO laser crystal, the Yb: LYSO laser can stably operate for a long time, and 61fs femtosecond pulse output is achieved.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a Yb:LYSO laser for Kerr lens self-mode-locking. Background technique [0002] LD (Laser Diode, laser diode) pumped all-solid-state lasers combine the advantages of diode lasers and solid-state lasers, and make up for the shortcomings of both, making LD-pumped all-solid-state lasers better than lamp-pumped solid-state lasers and diode lasers themselves , has the following advantages, such as high overall efficiency; good stability; high beam quality, small divergence angle, high spatial coherence; compact structure, miniaturization; high reliability, long life; easy to achieve single-frequency operation; peak power High; wide wavelength coverage, etc., so its various performance indicators and industrialization have made great progress. [0003] In 1981, Bell Laboratories in the United States successfully developed a collisional mode-locked dye laser, realizing femtosecond (fs, 1...

AI Technical Summary

Problems solved by technology

Although Kerr lens mode-locking can achieve wide-spectrum sub-100fs mode-locking pulse output, its fatal shortcoming is that it cannot be self-started, and because it is easily affected by the environment, Kerr lens mode-locking generally only lasts for a few hours. After that, a certain external disturbance is required to re-establish the mode-locked

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