Laser diode (LD) end-pumped passive mode-locking laser
A pumping laser and laser technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of large divergence angle and insufficient laser beam quality, and achieve the effect of improving beam quality
Inactive Publication Date: 2013-01-16
INST OF PHYSICS - CHINESE ACAD OF SCI +1
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Problems solved by technology
However, considering the high-power pumping, the laser crystal has a thermal lens effect, so the beam quality of the laser with the crystal as the output end is not good enough, and it has a large divergence angle
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[0019] 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 specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0020] This embodiment provides a passive mode-locked laser, the optical path structure of which is as follows figure 1 shown, including:
[0021] Pumping source 01 is a fiber-coupled semiconductor laser, used to output a pump laser with a wavelength of 808nm, the output power is 30W, the fiber core diameter is 200 microns, the numerical aperture is 0.22, and the fiber output is optically coupled by 1:1 The system is focused, the spot diameter after focusing is about 200 microns, and the focal length is 25mm;
[0022] Dichroic mirror 02, one end facing the pump source 01 is coated with a dielectric film for anti-r...
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The invention provides a passive mode-locking laser, which comprises a pump source used for outputting pump laser, a dichroic mirror, a laser crystal, a first concave mirror, a second concave mirror, a third concave mirror, a first plane mirror, a second plane mirror, a third plane mirror, a fourth plane mirror, an output mirror and a semiconductor saturable absorber mirror (SESAM), wherein laser emitted by the pump source passes through the dichroic mirror and is transmitted to the laser crystal; oscillation starting gain laser is transmitted to the first concave mirror, is sequentially reflected by the first concave mirror, the first plane mirror, the second plane mirror, the third plane mirror and the third concave mirror and is finally transmitted to the SESAM; the SESAM reflects the laser and returns the laser in the original path, the laser reaches the dichroic mirror and is sequentially reflected to the output mirror through the dichroic mirror, the second concave mirror and the fourth concave mirror; and after oscillation starting, mode-locking laser with high power and high beam quality is output through the output mirror.
Description
technical field [0001] The invention relates to an LD (Laser Diode, laser diode) end-pumped passive mode-locked laser, in particular to a passive mode-locked laser realized by a saturable absorber (SESAM). Background technique [0002] The all-solid-state picosecond laser is obtained by mode-locking technology, and the pulse duration is on the order of picoseconds (10 -12 ) ultrashort pulse laser, which has extremely wide application value in the fields of national defense, industry, medical treatment, and scientific research. Among them, a stable and reliable picosecond oscillator with high beam quality can become the seed source of a high-power all-solid-state picosecond laser amplifier, which is the basis for a wide range of applications. Therefore, obtaining a stable, high-power, high-beam-quality picosecond oscillator becomes a top priority. [0003] Passive mode locking with a saturable absorber (SESAM) is the most important means to obtain gain medium picosecond osc...
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IPC IPC(8): H01S3/098H01S3/13H01S3/0941
Inventor 魏志义王兆华王庆沈忠伟樊仲维麻云凤
Owner INST OF PHYSICS - CHINESE ACAD OF SCI