Fujikura Limited

Yohei Kasai

Akira Sakamoto

Nozomu Toyohara

Shinichi Sakamoto

Susumu Nakaya

Shohei Kumeta

Ken Katagiri

Gento Yoshino

Yoshihiro Tabata

A laser module includes an optical fiber, a laser device, an optical system, a housing, a lead terminal, a conductive wire, and an insulation member. The laser device emits a laser beam. The optical system couples the laser beam, emitted from the laser device, to the optical fiber. The housing includes a base plate on which the laser device is fixed and a side wall that includes an opening. The lead terminal extends from an outside of the housing through the opening of the side wall into the housing. The conductive wire electrically connects a connecting portion of the lead terminal, located within the housing, to the laser device. The insulation member includes a seal portion and an extension portion.

Laser module and method of manufacturing the same

A semiconductor laser module includes: an optical fiber that outputs a first laser beam to an exterior of the semiconductor laser module; semiconductor laser devices each including an emission portion that emits a second laser beam, an electrically conductive portion that supplies electric power to the emission portion, and a mount on which the emission portion and the electrically conductive portion are disposed; a mount base including mount surfaces that form steps; and an optical system that optically couples the second laser beams from the emission portions to an incident end face of the optical fiber. The mounts of the semiconductor laser devices are disposed on the mount surfaces. The semiconductor laser devices include an upper semiconductor laser device and a lower semiconductor laser device adjacent to each other in a step direction of the mount base.

Semiconductor laser module and method of manufacturing semiconductor laser module

A laser module includes: an optical fiber; a plurality of semiconductor laser devices that includes a first semiconductor laser device and a second semiconductor laser device; a condenser lens that condenses laser beams emitted from the plurality of semiconductor laser devices and optically couples the laser beams to the optical fiber; a first terminal that supplies a first drive current to the first semiconductor laser device; and a second terminal that supplies a second drive current that to the second semiconductor laser device. The second drive current is smaller than the first drive current.

Laser module and laser system

A laser module includes: a laser device that emits a laser beam including a major polarization component and a minor polarization component; a beam splitter that splits the laser beam into the major polarization component and the minor polarization component and that directs the major polarization component and the minor polarization component in different directions; an optical fiber that is optically coupled to the major polarization component split by the beam splitter and externally outputs the major polarization component; a package housing that houses the laser device and that has an inner surface including a minor polarization component irradiation portion that is irradiated by the minor polarization component split by the beam splitter; and a temperature measurement element that is attached to the package housing and that detects a temperature change of the minor polarization component irradiation portion.

Laser module and laser apparatus

An optical module including: a plurality of light emitting elements disposed on a same plane; a plurality of mirrors that reflect each light emitted from each of the plurality of light emitting elements; and a condenser lens into which each of the lights reflected by the plurality of mirrors enters. The plurality of mirrors reflects each of the lights emitted from each of the plurality of light emitting elements in a direction inclined with respect to a plane and aligns the light in a fast axis direction. Each of the lights emitted from the plurality of light emitting elements is reflected by the plurality of mirrors away from one another in the fast axis direction and is condensed at one point to reduce an aberration of light compared to a case where each of the lights enters into the condenser lens while propagating parallel to one another.

Optical module

A light-guiding device includes: a group of mirrors that converts a first beam bundle including a plurality of first laser beams into a second beam bundle including a plurality of second laser beams; a group of collimating lenses disposed at a stage previous to the group of mirrors and including collimating lenses that each collimate a divergence, in an F-axis direction, of a corresponding one of the plurality of first laser beams; and a converging lens disposed at a stage subsequent to the group of mirrors, the converging lens converges the second beam bundle by refracting each of the plurality of second laser beams.

Light guiding device, laser module, and method for manufacturing light guiding device

The present invention provides a bonding method (S) which is capable of achieving a high adhesive force without carrying out any special treatment on the second member (), even in a case where the first member () has a surface on which a gold thin film () is formed. The first member () is made of a material other than gold and has a surface on which the gold thin film () is formed. The bonding method (S) includes the steps of: (S) irradiating, with laser light, at least part of a specific region () of the surface of the first member (), so that a base of the thin film () is exposed in the at least part of the specific region (); and (S) bonding the second member () to the specific region () by use of an adhesive ().

Bonding structure on gold thin film

To increase the reliability of an LD module without decreasing the efficiency of coupling between the laser diode and the optical fiber, an LD module () includes a light-guiding device mounted therein that includes (i) a dividing optical system (DM) configured to divide a laser beam so as to generate a partial beam group and (ii) a compositing optical system (RM, RM, PRE, PBC) configured to composite the partial beam group so as to generate a partial beam bundle including a plurality of partial beams each having an S axis parallel to a particular spatial axis.

Light guide device, light guide method, and LD module

In a laser devicein which a laser moduleis mounted on a heat sink, a base plateof the laser moduleis fixed onto a mounting surfaceof the heat sinkin such a manner that a peripheral partis fixed to the heat sinkwith screws. The elastic force of the base platecauses stress in the direction toward the mounting surfaceon the central partof the base platesurrounded by the peripheral part

Laser device and laser device manufacturing method

An optical fiber module has a package housing having an internal space defined by a base plate, a side wall, and a cover member, a laser device disposed on the base plate within the internal space, an optical fiber that transmits a laser beam emitted from the laser device to an outside of the package housing, a light scattering member that scatters light having a wavelength of the laser beam and covers an outer circumferential surface of the projecting end of the optical fiber, and a heat dissipation portion disposed on the base plate. The optical fiber has a projecting end projecting from an inner surface of the side wall toward the internal space. The heat dissipation portion covers a portion of an outer circumferential surface of the light scattering member and exposes another portion of the outer circumferential surface of the light scattering member to the internal space.

Optical fiber module

A multiplexer includes: an output section outputting a beam bundle made of a plurality of laser beams whose F-axis directions are aligned; and an F-axis converging lens causing the beam bundle outputted from the output section to be converged in the F-axis direction. Optical axes of the plurality of laser beams constituting the beam bundle outputted from the output section intersect with each other at a single point without relying on the F-axis converging lens.

Multiplexer, multiplexing method, and LD module using outside-reflecting double mirrors

The semiconductor laser module () includes: a laser mount () having thereon a semiconductor laser chip (); a fiber mount () having thereon an optical fiber (); a submount () on which the laser mount () and the fiber mount () are placed; and a substrate () on which the submountis placed, the substrate () having protrusions (to) on a top surface thereof, the submountbeing joined to the substrate () with a soft solder () spread between the submount () and the substrate ().

Laser module

A laser module includes: a bottom plate of a box; the frame member being fixed to the bottom plate; a pipe member including a hollow portion PH communicating with the through hole OP of a box, the pipe member being fixed to the outer wall of the frame member; an optical fiber held on the hollow portion PH of the pipe member; and a laser element accommodated in the internal space of the box, the optical axis of the laser element being aligned with the optical axis of the optical fiber. When the bottom plate is placed on a plane, the bottom face of the pipe member is on the same face as a bottom plate portion contacting the plane.

Laser module and method for manufacturing same

A fiber mount deviceincludes a fiber sub-mount main bodythat is made of ceramic transmitting a laser beam having a predetermined wavelength, a bonding padthat is provided on the upper surface of the fiber sub-mount main body, and a laser absorption layerthat is provided on at least a part of the lower surface of the fiber sub-mount main bodyand absorbs the laser beam having the predetermined wavelength.

Fiber mount device, optical module using same, and optical module manufacturing method

The laser device includes a semiconductor laser element having an emission surface from which laser light is emitted, an optical fiber having an end part facing the emission surface, and an optical fiber supporting member which (i) supports the optical fiber and (ii) has a bonding pad to which the optical fiber is fixed by solder. The optical fiber supporting member includes a beam part having (i) a first main surface on which the bonding pad is provided and (ii) a second main surface opposite to the first main surface, and a pillar part which is fixed to a base and is joined to the beam part on an end portion of the beam part such that the second main surface and the base face each other while being spatially away from each other.

Growing community of inventors

Sakura, Japan

Yohei Kasai