The present disclosure relates to a ring-type laser system supporting circumferential radial emission. A cylindrical ring waveguide provides optical confinement in the radial and axial dimensions supporting a plurality of traveling wave modes with various degrees of confinement. The waveguide contains a gain media which is gain tailored to offset modal confinement factors of the modal constituency to favor radial emission. The selected modes radiate energy as they circulate the laser resonator with a 360 degree output coupler. The design is applicable toward both micro-resonators and resonators much larger than the optical wavelength, enabling high output powers and scalability. The circumferential radial laser emission can be concentrated by positioning the cylindrical ring laser inside a three-dimensional conical mirror thereby forming a laser ring of light propagating in the axial dimension away from the surface of the laser, which can be subsequently collimated for focused using conventional optics.

A laser microparticle for generating laser light with high omnidirectionality, including: an optical cavity including an active gain material capable of supporting one or more lasing cavity modes: and an optical scattering element which is incorporated into the optical cavity and configured to change a radiation pattern of the one or more lasing cavity modes to increase omnidirectionality of the radiation pattern, the size of the microparticle being less than 10 pm in each dimension.

A coherent Ising machine based on on-chip whispering gallery mode optical microcavity mainly adopts an optical microcavity integrated with a second laser processing apparatus (a nonlinear crystal), so as to archive an on-chip structure, which, compared with the fiber loop structure in the prior art, has the integration level optimized significantly.

A semiconductor laser diode and a method for manufacturing a semiconductor laser diode are disclosed. In an embodiment, the semiconductor laser diode includes a semiconductor layer sequence having an active zone, wherein the semiconductor layer sequence has a cylindrical shape, wherein a cylinder axis of the semiconductor layer sequence is perpendicular to a layer plane of the semiconductor layer sequence, and wherein the semiconductor laser diode is configured to emit radiation perpendicularly to the cylinder axis of the semiconductor layer sequence.

A semiconductor laser resonator configured to generate a laser beam includes a gain medium layer including a semiconductor material and comprising at least one protrusion formed by at least one trench to protrude in an upper portion of the gain medium layer. In the semiconductor laser resonator, the at least one protrusion is configured to confine the laser beam as a standing wave in the at least one protrusion.

A coherent Ising machine based on on-chip whispering gallery mode optical microcavity mainly adopts an optical microcavity integrated with a second laser processing apparatus (a nonlinear crystal), so as to archive an on-chip structure, which, compared with the fiber loop structure in the prior art, has the integration level optimized significantly.

The present disclosure describes a microring OAM laser producing an optical vortex beam with an on-demand topological charge and vector polarization states. This is enabled through combined index and gain/loss modulations at an EP, which breaks the mirror symmetry in the lasing generation dynamics and facilitates unidirectional power oscillation.

A semiconductor device includes an n-type ohmic contact layer, cathode and anode electrodes, p-type and n-type modulation doped quantum well (QW) structures, and first and second ion implant regions. The anode electrode is formed on the first ion implant region that contacts the p-type modulation doped QW structure and the cathode electrode is formed by patterning the first and second ion implant regions and the n-type ohmic contact layer. The semiconductor device is configured to operate as at least one of a diode laser and a diode detector. As the diode laser, the semiconductor device emits photons. As the diode detector, the semiconductor device receives an input optical light and generates a photocurrent.

There is provided a semi-circular resonator using a whispering gallery mode (WGM) and an optical sensor using the same. Accordingly, an active region that is a waveguide of an active layer in which laser oscillation is caused by gains of advancing beams is deeply etched in a semi-circular or semi-ring shape.

The present invention relates to a microdisk laser having characteristics of unidirectional emission and an ultra-high quality factor and also a microdisk laser composed of four circular arcs and configured to emit light in one direction in a resonance mode having the form of a whispering gallery mode formed by total reflection.