Patent ID: 11868023
Assignee: INSTITUTE FOR LASER TECHNOLOGY
Field: Optics (Instruments)
Classification: CPC G  H | IPC F  G

Claim 8:
9. An optical fiber comprising:
a light incident portion;
a light emerging portion; and
a wavelength converting portion provided between the light incident portion and the light emerging portion and containing a wavelength converting material, the wavelength converting material being configured to be excited by excitation light to produce a spontaneous emission of light having a longer wavelength than the excitation light, the wavelength converting material being configured to amplify the spontaneous emission of light to produce an amplified spontaneous emission of light, wherein:
the wavelength converting material is configured such that seed light incident on the light incident portion causes a stimulated emission of light from the wavelength converting material that has been excited by either the excitation light or the amplified spontaneous emission of light,
the seed light is formed by a plurality of seed light rays having mutually different wavelengths and the plurality of seed light rays are incident on the light incident portion, and
the wavelength converting material contains Pr3+ and Tb3+.