A system and method for combining multiple emitters into a multi-wavelength output beam having a certain band and combining a plurality of these bands into a single output using non-free space combining modules.

A light emitting device includes: a base; a first semiconductor laser element disposed on an upper surface of the base and configured to emit first light; a first light reflecting member disposed on the upper surface of the base, the first light reflecting member having a first light reflecting face including a plane configured to reflect the first light; a second semiconductor laser element disposed on an upper surface of the base and configured to emit second light; a second light reflecting member disposed on the upper surface of the base, the second light reflecting member having a second light reflecting face including a plane configured to reflect the second light; and a phosphor member onto which the first light reflected from the first light reflecting member and the second light reflected from the second light reflecting member are irradiated.

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.

Materials containing picocrystalline quantum dots that form artificial atoms are disclosed. The picocrystalline quantum dots (in the form of born icosahedra with a nearly-symmetrical nuclear configuration) can replace corner silicon atoms in a structure that demonstrates both short range and long-range order as determined by x-ray diffraction of actual samples. A novel class of boron-rich compositions that self-assemble from boron, silicon, hydrogen and, optionally, oxygen is also disclosed. The preferred stoichiometric range for the compositions is (B.sub.12H.sub.w).sub.xSi.sub.yO.sub.z with 3≤w≤5, 2≤x≤4, 2≤y≤5 and 0≤z≤3. By varying oxygen content and the presence or absence of a significant impurity such as gold, unique electrical devices can be constructed that improve upon and are compatible with current semiconductor technology.

A transmitting device, preferably containing at least two laser diodes and a scanning mirror, which is deflectable about its center (MP) and is arranged in a housing with a transparent cover element. The cover element is formed, at least in a coupling-out region, by a section of a monocentric hemispherical shell (HK) with a center of curvature (K) and is arranged to cover the scanning mirror in such a way that the center of curvature (K) of the hemispherical shell (HK) and the center (MP) of the scanning mirror coincide, and is formed in a coupling-in region by an optical block, comprising a toroidal entrance surface, in the special form of a cylindrical surface, at least one toroidal exit surface and at least two first mirror surfaces arranged between them, for deflecting and pre-collimating the laser beams.

An apparatus includes an optical splitter configured to receive an optical signal and to split the input optical signal to provide a first and a second optical signal. The apparatus further includes an interferometer comprising a first arm and a second arm, with the first arm being configured to receive the first optical signal, and the second arm being configured to receive the second optical signal. Notably a portion of the first arm is exposed to a reference gas that attenuates light of a characteristic wavelength. The apparatus further includes an optical coupler configured to receive an output optical signal from the first arm, and an output optical signal from the second arm and to provide a third optical signal; and a photodetector configured to receive the third optical signal, and to provide a photocurrent. The photocurrent increases when the difference between the characteristic wavelength and the wavelength of the optical signals increases. The apparatus also comprises a feedback control circuit configured to change the properties of the laser to be locked until an error signal indicative of the difference between the characteristic wavelength and the wavelength of the laser is substantially zero.

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.

Disclosed herein are single element dot pattern projectors with a meta-optics. The projectors include a laser light source and a metasurface chip integrated onto the laser light source. The metasurface chip includes metasurface elements spaced apart from the laser light source by a distance equal to the collimating function focal length of the metasurface chip. the laser light source produces light which is diffracted through the metasurface elements to produce a dot pattern. Projectors enabled by meta-optics lead to unique methods of integrating the meta-optic and unique functionality that can be added to the dot pattern.

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 system and method of providing a deformed FAC Lens to a multi-emitter diode bar laser system comprised of a lens holder and FAC lens wherein the FAC Lens is deformed so as to offset or compensate for the inherent smile properties present in a multi-emitter diode bar.