Large-energy-cavity-dumped Yb femtosecond laser

A femtosecond laser and high-energy technology, applied in the field of femtosecond laser, can solve the problems of inability to achieve short pulse width femtosecond laser output, low output energy of cavity-empty femtosecond laser, and the need for regular maintenance or replacement, etc., to achieve Good application prospect and commercial value, low price, short pulse effect

Pending Publication Date: 2021-09-03
XIDIAN UNIV
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Problems solved by technology

[0006] The difficulty in solving the above problems and defects is as follows: As far as the current various cavity-dumped femtosecond lasers are concerned, the cavity-dumped femtosecond lasers that use SESAM mode-locking cannot achieve short-pulse-width femtosecond laser output, and there are extremely It may cause damage to key mode-l

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  • Large-energy-cavity-dumped Yb femtosecond laser
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  • Large-energy-cavity-dumped Yb femtosecond laser

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[0029]In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0030] Aiming at the problems existing in the prior art, the present invention provides a large-energy cavity-emptied Yb femtosecond laser, a control method and its application. The present invention will be described in detail below with reference to the accompanying drawings.

[0031] like figure 1 As shown, the large-energy cavity-emptied femtosecond laser provided by the embodiment of the present invention includes:

[0032] Pumping source 1 is a fiber-coupled semiconductor laser, used to output pumping laser light with a wavelength of 976nm or 980nm, the output power is not less than 50W, the fiber core diameter is 105...

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Abstract

The invention belongs to the technical field of femtosecond lasers, and discloses a large-energy-cavity-dumped Yb femtosecond laser which comprises a pumping source, an optical coupling system, a planar dichroic mirror, a Yb laser crystal, a first concave mirror, a second concave mirror, an output mirror, a first GTI mirror, a second GTI mirror, a third GTI mirror, a third concave mirror, a nonlinear medium, a fourth concave mirror, a TFP, an electro-optical modulator and a planar mirror. The cavity-dumped laser is based on a high-power Kerr lens mode-locked oscillator, starts mode locking without the help of an SESAM device prone to damage, and guarantees that mode-locked pulses in a cavity have the short pulse width and the high single pulse energy; and after the large-energy short-pulse-width pulse in the cavity is stably oscillated, the electro-optical modulator is used for changing a polarization state of laser, and the pulse laser larger than 0.5 mu J and smaller than 100 fs in pulse width can be effectively guided out and achieved in combination with the TFP.

Description

technical field [0001] The invention belongs to the technical field of femtosecond lasers, in particular to a large-energy cavity-empty Yb femtosecond laser. Background technique [0002] At present: high-energy femtosecond lasers are widely used in cutting-edge scientific research and industrial processing. However, the laser single pulse energy directly output by the femtosecond oscillator is generally on the order of several nanojoules (nJ) or tens of nJ, which cannot meet the requirements of Femtosecond filament formation, high-order harmonic generation, and material micromachining are required. Cavity-dumped femtosecond laser is a laser based on cavity-dumping technology to directly expand the single pulse energy output by the oscillator. Compared with laser amplifiers, its structure is more compact and its cost is lower. [0003] Kerr lens mode-locked (KLM) Ti:sapphire oscillators are one of the schemes for cavity-dumped lasers. In 1993, M. Ramaswamy first reported ...

Claims

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Application Information

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IPC IPC(8): H01S3/06H01S3/081H01S3/094H01S3/0941H01S3/10H01S3/098
CPCH01S3/0623H01S3/081H01S3/094049H01S3/0941H01S3/10053H01S3/1112
Inventor 田文龙徐瑞朱江峰张大成魏志义
Owner XIDIAN UNIV
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