Abstract: An optical apparatus includes: a base; a light emitting element arranged on the base and configured to output laser light; a plurality of optical components arranged on the base and configured to guide the laser light output from the light emitting element to an optical fiber, and couple the laser light with the optical fiber; and a shielding unit arranged on the base and configured to block stray light deviated from a predetermined optical path in a first optical component as the optical component and traveling to a second optical component as the optical component, and reflect the stray light in a direction deviating from the first optical component.

Abstract: An optical fiber support structure includes: a first portion configured to support an optical fiber including a core wire and a covering surrounding the core wire, the core wire including a core and a cladding; a second portion attached to the first portion; and a relaxing portion that is connected to an end portion of the core wire and that is positioned between the first portion and the second portion, the relaxing portion having a light receiving surface configured to receive light input from a space, an area of the light receiving surface being larger than an area of the end portion of the core wire.

Abstract: A light emitting apparatus includes: a light emitting element configured to emit laser light; a case configured to house the light emitting element, and including a window configured to allow transmittance of the laser light emitted from the light emitting element; a first optical element provided outside the case and configured to converge, in a fast axis direction, the laser light passing through the window; and a second optical element configured to collimate the laser light input via the first optical element, in the fast axis direction, in a state where a beam width in the fast axis direction is narrower than a beam width in the fast axis direction on an incident surface of the first optical element, the second optical element being located closer to the first optical element than a convergence point of the laser light in the fast axis direction by the first optical element.