Optical oscillator

3:

• The optical oscillator according to claim 2, wherein the support is a plano-convex lens.

4:

• The optical oscillator according to claim 1, wherein a size of the saturable absorption portion is smaller than a size of the laser medium when viewed in the one direction.

5:

• The optical oscillator according to claim 4, wherein a laser medium configured to emit light having the second wavelength due to incidence of light having the first wavelength is provided around the saturable absorption portion when viewed in the one direction.

6:

• The optical oscillator according to claim 1, wherein the first reflecting portion is a planar mirror.

7:

• The optical oscillator according to claim 1, wherein the first reflecting portion is curved.

8:

• The optical oscillator according to claim 7, wherein the first reflecting portion is curved on the side opposite to the laser medium.

9:

• The optical oscillator according to claim 1, wherein an opening for passing laser light having the second wavelength is formed in at least a part of a region of the first reflecting portion overlapping the second reflecting portion when viewed in the one direction.

11:

• The optical oscillator according to claim 10, wherein a length in a bonding direction of the laser medium and the saturable absorption portion in a bonded body of the laser medium and the saturable absorption portion is smaller than 10 mm.

12:

• The optical oscillator according to claim 1,
• wherein the laser medium and the saturable absorption portion are bonded to each other, and
• a length in a bonding direction of the laser medium and the saturable absorption portion in a bonded body of the laser medium and the saturable absorption portion is smaller than 10 mm or is smaller than a distance between the first reflecting portion and the second reflecting portion.

13:

• The optical oscillator according to claim 1, wherein a radius of curvature of the second reflecting portion is 10 mm to 100 mm.

14:

• The optical oscillator according to claim 1, wherein a diameter of the second reflecting portion is 1 mm to 3 mm.

15:

• The optical oscillator according to claim 1, comprising:
• a lens disposed on the side opposite to the first reflecting portion when viewed from the second reflecting portion, the lens collimating light output from the unstable resonator,
• wherein a focal length of the lens is 30 mm to 200 mm.

16:

• The optical oscillator according to claim 1, wherein a distance between the first reflecting portion and the second reflecting portion is smaller than 15 mm.

17:

• The optical oscillator according to claim 2, wherein a size of the saturable absorption portion is smaller than a size of the laser medium when viewed in the one direction.

18:

• The optical oscillator according to claim 17, wherein a laser medium configured to emit light having the second wavelength due to incidence of light having the first wavelength is provided around the saturable absorption portion when viewed in the one direction.

19:

• The optical oscillator according to claim 2, wherein the first reflecting portion is a planar mirror.

20:

• The optical oscillator according to claim 2, wherein the first reflecting portion is curved.

21:

• The optical oscillator according to claim 20, wherein the first reflecting portion is curved on the side opposite to the laser medium.

22:

• The optical oscillator according to claim 2, wherein an opening for passing laser light having the second wavelength is formed in at least a part of a region of the first reflecting portion overlapping the second reflecting portion when viewed in the one direction.

24:

• The optical oscillator according to claim 23, wherein a length in a bonding direction of the laser medium and the saturable absorption portion in a bonded body of the laser medium and the saturable absorption portion is smaller than 10 mm.

25:

• The optical oscillator according to claim 2,
• wherein the laser medium and the saturable absorption portion are bonded to each other, and
• a length in a bonding direction of the laser medium and the saturable absorption portion in a bonded body of the laser medium and the saturable absorption portion is smaller than 10 mm or is smaller than a distance between the first reflecting portion and the second reflecting portion.

26:

• The optical oscillator according to claim 2, wherein a radius of curvature of the second reflecting portion is 10 mm to 100 mm.

27:

• The optical oscillator according to claim 2, wherein a diameter of the second reflecting portion is 1 mm to 3 mm.

28:

• The optical oscillator according to claim 2, comprising:
• a lens disposed on the side opposite to the first reflecting portion when viewed from the second reflecting portion, the lens collimating light output from the unstable resonator,
• wherein a focal length of the lens is 30 mm to 200 mm.

29:

• The optical oscillator according to claim 2, wherein a distance between the first reflecting portion and the second reflecting portion is smaller than 15 mm.