A light-emitting module includes a substrate, a first surface-emitting laser mounted on the substrate, the first surface-emitting laser having a first engaging portion protruded outward at an end, and a second surface-emitting laser mounted on the substrate, the second surface-emitting laser having a second engaging portion recessed inward at an end. The first surface-emitting laser and the second surface-emitting laser are adjacent to each other. The first engaging portion and the second engaging portion are engaged with each other.

An optical assembly comprising a busbar system comprising an electrically conductive first busbar conductively coupled to one or more electrically conductive mechanical fasteners and one or more vertical-cavity surface-emitting laser (VCSEL) array modules each comprising one or more electrically conductive contacts. Each VCSEL array module is releasably fastened to the busbar system by the one or more of the mechanical fasteners. When in a fastened position, the one or more mechanical fasteners are conductively coupled to the one or more electrically conductive contacts to provide an electrical connection between the first busbar and the one or more VCSEL array modules.

In a laser light emitting device including a plurality of laser light emitter each including a laser diode, a drive circuit configured to drive the laser diode by controlling the supply of a drive current to the laser diode, and a drive line through which the drive current flows from the drive circuit to the laser diode, a light emission detector includes a detection pattern placed so as to cause an electromagnetically induced current to flow in response to a drive current flowing through each drive line when the corresponding laser light emitter emits light. The light emission detector detects light emission from a driven laser diode by detecting the current flowing in the detection pattern.

A light source module that emits a combined laser beam, and includes: a plurality of semiconductor laser elements; and a control circuit that controls power of a laser beam emitted by each of the semiconductor laser elements. The semiconductor laser elements include: a first element group that emits a first laser beam; and a second element group that emits a second laser beam. The combined laser beam includes at least one of the first laser beam or the second laser beam. The control circuit maintains an average combined-beam wavelength that is an average wavelength of the combined laser beam constant for a change in power of the combined laser beam. When the power of the first laser beam and the power of the second laser beam are equal to each other, an average wavelength of the first laser beam is longer than an average wavelength of the second laser beam.

An applicator comprising multiple laser assemblies connected to a power supply and a controller that switches each pulse to a different one of the laser assemblies. Each laser assembly deposits a laser spot on the skin and the result is to produce a large ‘aggregate’ spot without requiring extra power or extra lasers. In one embodiment, each pulse serves as a trigger to switch the next pulse to the next laser assembly.

Apparatus include a plurality of laser diodes configured to emit respective laser diode beams having perpendicular fast and slow beam divergence axes mutually perpendicular to respective beam axes, and beam shaping optics configured to receive the laser diode beams and to circularize an ensemble image space and NA space of the laser diode beams at an ensemble coupling plane. In selected examples, beam shaping optics include variable fast axis telescopes configured to provide variable fast axis magnification and beam displacement.

A photonic-device-mounting package has a base having plural mounting portions. Each of the plural mounting portions has a first mounting portion on which a light-emitting device is mounted and a second mounting portion on which an optical component is mounted, the second mounting portion being at a position in a light emission direction of the light-emitting device. The base has a first wall disposed between two mounting portions arranged next to one another in the light emission direction, the first wall having a height larger than the height of the first mounting portion.

A device for measuring optical spectra at high speed and with high resolution using tunable optical laser comb sources. In one embodiment there is provided a first tunable comb laser source and a second tunable comb laser source whereby the wavelength of each comb laser source is chosen such that the combination of the two sources provides a continuous spectral coverage over a band in an optical spectrum under a selected wavelength tuning condition. By overlapping the two comb sources in the manner described the deadzone issue is overcome in the most spectrally efficient way possible.

A radiation source for emitting terahertz radiation (6) is specified, comprising at least two laser light sources emitting laser radiation (11, 12) of different frequencies, and a photomixer (5) comprising a photoconductive semiconductor material (51) and an antenna structure (52), the photomixer (5) being configured to emit the laser radiation (11, 12) of the laser light sources (1, 2) and emitting terahertz radiation (6) with at least one beat frequency of the laser light sources, and wherein the at least two laser light sources are surface-emitting semiconductor lasers (1, 2) which are arranged in a one-dimensional or two-dimensional array on a common carrier (10).

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.