Semiconductor laser-pumped kerr lens mode-locked titanium sapphire laser

Abstract

The invention discloses a semiconductor laser-pumped kerr lens mode-locked titanium sapphire laser, which comprises first semiconductor lasers, a resonant cavity, an interferometer and a feedback regulation unit, wherein the first semiconductor lasers are used for emitting continuous laser light of blue and green bands to pump titanium sapphire crystal in the resonant cavity; the resonant cavity is used for carrying out oscillating and mode locking on the laser light of near-infrared bands to output femtosecond pulse laser light; the interferometer is used for driving the femtosecond pulse laser light to generate a beat note signal to obtain a carrier-envelope offset frequency; and the feedback regulation unit is used for regulating front and back positions and gradients of end mirrors ofthe resonant cavity and the power of the laser light output by the semiconductor lasers, thereby keeping the stability of a repetition frequency and the carrier-envelope offset frequency. An ultrashort laser light pulse with stable repetition frequency and carrier-envelope offset frequency can be output, and the semiconductor lasers are directly adopted as pumping sources, so that the cost of thelasers is greatly reduced, and the volume of the whole lasers is further reduced.

Description

technical field [0001] The invention belongs to the field of laser technology, and more specifically relates to a Kerr lens mode-locked titanium sapphire laser pumped by a semiconductor laser. Background technique [0002] In 1991, Spence et al first realized the Kerr lens mode-locking of Ti-sapphire femtosecond oscillator, and the mode-locking pulse width was 60fs. Today, Kerr lens mode-locked titanium-sapphire lasers have become one of the most important and widely used ultrashort pulse light sources after long-term development and improvement. [0003] For oscillators and amplifiers based on Ti-doped sapphire, the most suitable wavelength of pump light is in the blue-green band. The original pump source was an argon ion laser. Argon ion laser is an inert gas ion laser, its typical spectral lines are 514.5nm and 488nm, and it has the advantage of high pump power. However, the low conversion efficiency limits its application range. Since 2000, there have been few reports...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the above defects or improvement needs of the prior art, the present invention provides a semiconductor laser pumped Kerr lens mode-locked titanium-sapphire laser, thereby solving the problem that the prior art cannot realize the carrier wave with a lower cost and a more simplified system Technical Issues of Femtosecond Laser Output with Envelope Offset Frequency Stabilization

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