Optical resonator, constituent part of optical resonator, and laser device

A laser device, comprising:

• a laser medium between a pair of reflection members,
• wherein the laser medium is configured to emit emitted light that is excited by excitation light;
• a wavelength band limiting element that is on a side of emission of the emitted light between the pair of reflection members,
• wherein the wavelength band limiting element includes two reflection flat faces that are orthogonal to an optical axis of the laser medium,
• the wavelength band limiting element is configured to limit a wavelength band of the emitted light,
• the wavelength band limiting element is in a position that prevents a generation of a resonance component outside an intended wavelength range of the wavelength band limiting element,
• the resonance component is prevented between the wavelength band limiting element and a reflection member on a laser beam emission side of the pair of reflection members, and
• a distance between the wavelength band limiting element and the reflection member on the laser beam emission side is within 50 microns;
• and
• an excitation light source unit that is configured to cause the excitation light to exit to the laser medium.

A constituent part of an optical resonator, the constituent part comprising:

• a laser medium between a pair of reflection members;
• a saturable absorber that has a transmittance that increases based on absorption of emitted light emitted from the laser medium;
• and
• a wavelength band limiting element that is on a side of emission of the emitted light between the pair of reflection members,
• wherein the wavelength band limiting element includes two reflection flat faces that are orthogonal to an optical axis of the laser medium,
• the two reflection flat faces comprises a first flat face and a second flat face parallel to the first flat face,
• the two reflection flat faces are included on both side faces of the saturable absorber, and
• a distance between the wavelength band limiting element and a reflection member on a laser beam emission side of the pair of reflection members is within 50 microns.

A constituent part of an optical resonator, the constituent part comprising:

• a pair of reflection members that configure the optical resonator;
• and
• a wavelength band limiting element that is on a side of emission of emitted light between the pair of reflection members,
• wherein the wavelength band limiting element includes two reflection flat faces that are orthogonal to an optical axis of the optical resonator, and
• the wavelength band limiting element is configured to limit a wavelength band of the emitted light,
• the two reflection flat faces include a flat face on the side of emission of the emitted light,
• the flat face configures a reflection member on the side of emission of the emitted light from among the pair of reflection members, and
• a distance between the wavelength band limiting element and the reflection member on a laser beam emission side of the pair of reflection members is within 50 microns.