An optical resonator, a constituent part of the optical resonator, and a laser device that enable a reduction in size even if a wavelength band limiting element is disposed in the optical resonator, are provided.

An optical resonator including: a laser medium that is disposed between a pair of reflection members, and emits emitted light that has been excited by excitation light that has been predetermined; and a wavelength band limiting element that is disposed on a side of emission of the emitted light between the pair of reflection members, includes two reflection flat faces that are orthogonal to an optical axis of the laser medium, and limits a wavelength band of the emitted light, in which the wavelength band limiting element is disposed in a position that prevents a resonance component outside an intended wavelength range of the wavelength band limiting element from being generated between a reflection member on a laser beam emission side from among the pair of reflection members and the wavelength band limiting element.

The invention provides a light generating system (1000) comprising (a) first light generating device (110), (b) a first laser (2100), and (c) a second laser (2200), wherein:the first light generating device (110) is configured to generate first device light (111) having a first device centroid wavelength (.sub.cd,1), wherein the first light generating device (110) comprises one or more of a solid state material laser and a super luminescent diode; the first laser (2100) comprises a first lanthanide based luminescent material (2110) configured to convert at least part of the first device light (111) having the first device centroid wavelength (.sub.cd,1) into first luminescent material light (2111), wherein the first laser (2100) is configured downstream of the first light generating device (110) and is configured to provide first laser light (2101) comprising at least part of the first luminescent material light (2111), wherein the first laser light (2101) has a first centroid laser wavelength (.sub.cl,1) in the visible; the second laser (2200) comprises a second lanthanide based luminescent material (2210) configured to convert at least part of the first device light (111) having the first device centroid wavelength (.sub.cd,1) into second luminescent material light (2211), wherein the second laser (2200) is configured downstream of the first light generating device (110) and is configured to provide second laser light (2201) comprising at least part of the second luminescent material light (2211), wherein the second laser light (2201) has a second centroid laser wavelength (.sub.cl,2) in the visible, wherein |.sub.cl,2.sub.cl,1|25 nm; the first centroid laser wavelength (.sub.cl,1) and the second centroid laser wavelength (.sub.cl,2) are selected from different wavelength ranges from C the group of (i) 495-570 nm, (ii) 570-590 nm, (iii) 590-620 nm, and (iv) 620-780 nm, andin a first operational mode of the light generating system (1000) the light generating system (1000) is configured to provide system light (1001) comprising the first laser light (2101) and the second laser light (2201), and wherein in the first operational mode the system light (1001) is white light.