Radial polarization thin-disk laser

A radial polarization disk laser, comprising:

• a pumping source, a collimator lens, a focusing lens, a laser gain medium, a Brewster axial cone, and a output lens, which are sequentially arranged along a laser light path, wherein an angle formed between a conical surface and a bottom surface of said Brewster axial cone is a Brewster's angle;
• said laser gain medium is bonded with said bottom surface;
• said laser gain medium and said output lens form a laser harmonic oscillator cavity therebetween;
• wherein pumped laser light emitted by said pumping source passes through said collimator lens and said focusing lens, is then focused on the laser gain medium, and generated photons oscillate in said laser harmonic oscillator cavity, and then a radially polarized laser beam is finally output by said output lens, and
• wherein the laser further comprises a concave reflector group disposed at a side of the laser gain medium away from said Brewster axial cone;
• wherein the pumped laser light not absorbed by the laser gain medium is reflected by said concave reflector group, and then reenters said laser gain medium.

A radial polarization disk laser, comprising:

• a pumping source, a collimator lens, a focusing lens, a laser gain medium, a Brewster axial cone, and a output lens, which are sequentially arranged along a laser light path, wherein an angle formed between a conical surface and a bottom surface of said Brewster axial cone is a Brewster's angle;
• said laser gain medium is bonded with said bottom surface;
• said laser gain medium and said output lens form a laser harmonic oscillator cavity therebetween;
• wherein pumped laser light emitted by said pumping source passes through said collimator lens and said focusing lens, is then focused on the laser gain medium, and generated photons oscillate in said laser harmonic oscillator cavity, and then a radially polarized laser beam is finally output by said output lens;
• wherein the laser gain medium is Yb:YAG disk with a doping concentration of 5.0 at % to 15 at %, and the Yb:YAG disk has a thickness of 0.2 to 0.5 mm;
• and
• wherein one surface of said laser gain medium away from the Brewster axial cone is provided with a first two-wavelength coating, which is highly transmissive in respect to incident light and highly reflective in respect to emergent light;
• and the other surface of said gain medium close to the Brewster axial cone is provided with a second two-wavelength coating, which is highly reflective in respect to incident light and highly transmissive in respect to emergent light.