Irradiation probe and irradiation probe system

An irradiation probe comprising:

• a plurality of optical fibers bundled together, each of the optical fibers including, as at least a partial section in a longitudinal direction, a leakage section configured to output leakage light radially outward;
• and
• a reflective member placed at least radially inward of the irradiation probe with respect to the optical fiber and configured to reflect the leakage light from the optical fiber, wherein
• each of the optical fibers has directivity in which intensity of leakage light in a specific radial direction is higher than intensity of leakage light in another radial direction in a cross section intersecting an axial direction of the leakage section,
• the optical fibers are disposed apart from a central axis of the irradiation probe in radial directions different from each other, and
• the optical fibers are bundled together in a posture in which leakage light to the specific radial direction from the leakage section is directed radially inward of the irradiation probe.

An irradiation probe comprising:

• a plurality of optical fibers bundled together, each of the optical fibers including, as at least a partial section in a longitudinal direction, a leakage section configured to output leakage light radially outward;
• and
• a shielding member configured to prevent the leakage light from the leakage section of each of the optical fibers from traveling radially inward or a circumferential direction of the irradiation probe, wherein
• the optical fibers are disposed apart from a central axis of the irradiation probe in radial directions different from each other.

An irradiation probe system comprising:

• an irradiation probe including
• a plurality of optical fibers bundled together, the plurality of optical fibers being arranged side by side in a circumferential direction of the irradiation probe and configured to leak light radially outward from an outer surface of each of the plurality of optical fibers in a leakage section in a longitudinal direction;
• a light source;
• and
• a switching mechanism configured to selectively input light from the light source to at least one of the plurality of optical fibers.