Abstract: A light-emitting device includes a substrate, a base disposed on the substrate, a light-emitting element disposed over the base, a frame body, and at least one of a functional element and a wire. The frame body includes an inner wall surface surrounding the base and the light-emitting element, an upper surface, and a lower surface connected to the substrate. At least one of the functional element and the wire is disposed on the substrate. At least a part of the at least one of the functional element and the wire is disposed below the light-emitting element. The inner wall surface includes an inclined surface that is inclined so that a distance between the inclined surface and the light-emitting element increases from an upper surface side toward a lower surface side. The at least one of the functional element and the wire is disposed between the inclined surface and the base.

Abstract: A light source device includes a substrate, an edge-emitting laser element, a surface-emitting laser element, and an optical member. The substrate has a supporting surface. The edge-emitting laser element is directly or indirectly supported by the supporting surface and configured to emit a first light beam in a first direction. The surface-emitting laser element is directly or indirectly supported by the supporting surface and configured to emit a second light beam in a second direction different from the first direction. The optical member is configured to receive the first light beam and the second light beam and to cause the first light beam and the second light beam to exit the optical member as light beams traveling along a same axis.

Abstract: A cap has a cavity for accommodating a light-emitting element and includes a front wall defining a front surface of the cavity and made of a material that transmits light emitted from the light-emitting element; a rear wall defining a rear surface of the cavity and located opposite to the front wall; and a main body defining an upper surface and a lateral surface of the cavity and joined with the front wall and the rear wall. A lower end surface of each of the front wall, the rear wall, and the main body defines a bonding surface of the cap, and the main body includes a plurality of portions layered between the rear wall and the front wall.

Abstract: A semiconductor device includes: a semiconductor element; a submount on which the semiconductor element is mounted, wherein the submount has a first surface on which the semiconductor element is mounted, a second surface located on a side opposite the first surface, and a lateral surface located between the first surface and the second surface, and wherein the submount comprises: a groove located at the second surface, a heat dissipation portion located at the second surface, and an electrode pattern located at the first surface; a package substrate on which the submount is mounted; a first joint member that physically joins the heat dissipation portion to the package substrate; and a connection portion located on the side surface, wherein the connection portion electrically connects the electrode pattern and the package substrate, and the connection portion comprises a second joint member.

Abstract: A light source device includes: a substrate having a support face; a lateral wall part disposed on the substrate and having an upper face and inner wall faces, the inner wall faces defining a space; a laser diode located in the space; a first submount having a mounting face bonded to an upper face of the laser diode, and an upper face located opposite the mounting face; a sealing member bonded to the upper face of the lateral wall part and the upper face of the first submount, thereby sealing the space; a heat dissipating block located above the first submount; and a heat conducting member located between the first submount and the heat dissipating block.

Abstract: A light source device includes: a laser light source configured to emit laser light having a peak wavelength included in a wavelength range of light absorbed or reflected by a first region or a second region of an object under study, the laser light source being configured to form a speckle pattern having speckle contrasts that differ between the first region and the second region; and a speckle variable device configured to control a coherence of the laser light in response to an external control signal.

Abstract: A light source device includes: a laser diode configured to emit laser light; a substrate directly or indirectly supporting the laser diode; and a cap secured to the substrate and covering the laser diode, the cap including: a first portion configured to transmit the laser light that is emitted from the laser diode, and a second portion that is bonded to the first portion. The second portion includes: a pair of lateral wall portions that are located at lateral sides of the laser diode, the pair of lateral wall portions being bonded to the first portion, a cover portion that is located above the laser diode and connects the pair of lateral wall portions together, and a rear wall portion that faces the first portion with the laser diode disposed between the first portion and the rear wall portion of the second portion.

Abstract: A light source device includes: a laser diode including an emission end surface for emitting laser light and a rear end surface opposite to the emission end surface; a reflecting member that reflects a portion of the laser light emitted from the emission end surface of the laser diode; a photodetector configured to detect light that is reflected at the reflecting member; and a light-shielding member disposed between the rear end surface of the laser diode and the photodetector, the light-shielding member configured to shield at least a portion of light emitted from the rear end surface of the laser diode.

Abstract: A light source device 100 includes a first substrate 10 having a first mounting surface 10a, a second substrate 11 having a second mounting surface 11a that opposes the first mounting surface, a first laser diode 30a directly or indirectly supported by the first mounting surface, a second laser diode 30b directly or indirectly supported by the first mounting surface, and a third laser diode 30c directly or indirectly supported by the second mounting surface. The emission point of the third laser diode is positioned between the emission point of the first laser diode and the emission point of the second laser diode in the width direction, and in a plan view, when viewed in the direction perpendicular to the first mounting surface, at least one the first laser diode and the second laser diode at least partially overlaps the third laser diode.

Abstract: A light source device includes: a plurality of laser diodes that includes a first laser diode for emitting laser light of red color, a second laser diode for emitting laser light of green color, and a third laser diode for emitting laser light of blue color; a substrate directly or indirectly supporting the plurality of laser diodes; and a cap secured to the substrate and covering the plurality of laser diodes. The cap includes: a first glass portion configured to transmit the laser light that is emitted from the plurality of laser diodes, and a second glass portion. At least one of the first glass portion and the second glass portion comprises an alkaline glass region. The first glass portion and the second glass portion are bonded together via an electrically conductive layer that is in contact with the alkaline glass region. The first glass portion is bonded to the substrate.

Abstract: A manufacturing method of a light-emitting device includes: preparing a mounting substrate having a mounting surface, the mounting substrate including a first metal pattern arranged on a mounting surface side, a second metal pattern arranged on the mounting surface side inward of the first metal pattern in a plan view, and a third metal pattern arranged on the mounting surface side outward of the first metal pattern in the plan view; arranging a light-emitting element over the mounting surface of the mounting substrate; applying a bonding material to the first metal pattern; and joining a sealing member to at least the first metal pattern of the mounting substrate via the bonding material, the sealing member including a fourth metal pattern with a width greater than or equal to a width of the first metal pattern.

Abstract: A method includes providing a first plate for a front wall that defines a front surface of a recess to accommodate a laser diode, a second plate for a rear wall that defines a rear side of the recess, and a third plate for a main body that defines an upper side and lateral sides of the recess and is connected to the front wall and the rear wall. The third plate has through-holes arranged in a first direction and in a second directions orthogonal to the first direction. The plates are bonded together to produce a stacked body. The stacked body is cut along the first direction and the second direction to produce a plurality of caps from the stacked body. When cutting the stacked body along the first direction, a first incision is made along inner wall surfaces of through-holes adjacent along the first direction.

Abstract: A light source device includes: first and second laser diodes; a reflector having: first and second reflecting faces configured to reflect a portion of light from the respective first and second laser diodes and to transmit a portion of the light from the respective first and second laser diodes, and first and second exit faces configured to allow the portions of the light transmitted through the respective first and second reflecting faces to exit; and a photodetector including: first and second light receiving element configured to receive light exiting the first and second exit faces, respectively. The reflector is configured such that the light transmitted through the first reflecting face is hindered from exiting the second exit face and the light transmitted through the second reflecting face is hindered from exiting the first exit face.

Abstract: A light source device includes: a plurality of laser diodes that includes a first laser diode for emitting laser light of red color, a second laser diode for emitting laser light of green color, and a third laser diode for emitting laser light of blue color; a substrate directly or indirectly supporting the plurality of laser diodes; and a cap secured to the substrate and covering the plurality of laser diodes. The cap includes: a first glass portion configured to transmit the laser light that is emitted from the plurality of laser diodes, and a second glass portion. At least one of the first glass portion and the second glass portion comprises an alkaline glass region. The first glass portion and the second glass portion are bonded together via an electrically conductive layer that is in contact with the alkaline glass region. The first glass portion is bonded to the substrate.

Abstract: An image-capturing device includes: an illumination light source configured to emit illumination light to illuminate an object; a laser light source configured to emit laser light with a peak wavelength in a range of wavelengths absorbed or reflected by at least one region of the object; an imaging device configured to take an image of the object; a speckle variable device configured to change a speckle pattern in an image acquired by the imaging device over time; and an image processing device configured to process the image acquired by the imaging device, which includes: measuring a change over time in a intensity signal from each pixel constituting the image, and dividing an imaged region of the object into a plurality of portions based on a waveform of the change in the intensity signal over time.

Abstract: A light source device includes: a substrate having a support face; a plurality of light emitting elements disposed on the support face, the plurality of light emitting elements including a first light emitting element and a second light emitting element, each of which is a vertical-cavity surface-emitting laser element; and a planar lightwave circuit having a light incident face that faces the support face and including a plurality of optical waveguides configured to guide light that has exited from the respective plurality of light emitting elements and entered the light incident face. The planar lightwave circuit is directly or indirectly supported by the plurality of light emitting elements. The substrate includes a first wiring layer electrically connected to the first light emitting element and the second light emitting element.

Abstract: A light source device includes: a laser diode; a substrate directly or indirectly supporting the laser diode; and a cap secured to the substrate and covering the laser diode. The cap includes a first glass portion configured to transmit laser light that is emitted from the laser diode, and a second glass portion. At least one of the first glass portion and the second glass portion includes an alkaline glass region. The first glass portion and the second glass portion are bonded together via an electrically conductive layer that is in contact with the alkaline glass region.

Abstract: A light emitting device includes: at least one semiconductor laser element; a submount; and a base portion having a mounting surface. The submount includes: a first lateral face being located at a side of an exiting lateral surface of the semiconductor laser element, the first lateral face intersecting the upper face of the submount, and the first lateral face being above and separated from the mounting surface; a lower face being set back inside of the submount relative to an edge at which the upper face and the first lateral face intersect in a top view; and a second lateral face being located at the same side as the first lateral face and intersecting the lower face. A portion of a bonding material protrudes from the lower face and extends outward of an edge at which the lower face and the second lateral face intersect.

Abstract: A light emitting device includes: laser diodes (LDs); a planar lightwave circuit (PLC) including optical waveguides; and a lens. The optical waveguides include: a first optical waveguide to receive first light emitted from a first LD and to emit the first light from a first light-exiting end; and a second optical waveguide to receive second light emitted from a second LD and to emit the second light from a second light-exiting end. The first light-exiting end causes refraction such that the first light exits in a first direction. The second light-exiting end causes refraction such that the second light exits in a second direction. A distance from the first light-exiting end to the lens along the first direction is shorter than a distance from the second light-exiting end to the lens along the second direction.

Abstract: A light source device includes: a laser diode including an emission end surface for emitting laser light and a rear end surface opposite to the emission end surface; a reflecting member that reflects a portion of the laser light emitted from the emission end surface of the laser diode; a photodetector configured to detect light that is reflected at the reflecting member; and a light-shielding member disposed between the rear end surface of the laser diode and the photodetector, the light-shielding member configured to shield at least a portion of light emitted from the rear end surface of the laser diode.