A combination of microvalves and waveguides may enable the creation of reconfigurable on-chip light sources compatible with planar sample preparation and particle sensing architecture using either single-mode or multi-mode interference (MMI) waveguides. A first type of light source is a DFB laser source with lateral gratings created by the light valves. Moreover, feedback for creating a narrowband light source does not have to be a DFB grating in the active region. A DBR configuration (Bragg mirrors on one or both ends of the active region) or simple mirrors at the end of the cavity can also be used. Alternately, ring resonators may be created using a valve coupled to a bus waveguide where the active gain medium is either incorporated in the ring or inside an enclosed fluid. The active light source may be activated by moving a fluid trap and/or a solid-core optical component defining its active region.

A laser device for laser resonance ionization includes a wavelength variable grating-type titanium-doped sapphire laser and includes a titanium (Ti) doped titanium sapphire crystal disposed within a resonator. The titanium sapphire crystal is fixedly disposed on a stage. The titanium-doped sapphire crystal can be moved in the optical axis direction by the stage, thereby changing the position of the titanium-doped sapphire crystal. The switching between the wideband mode and the high-output mode can be performed by changing the position of the titanium-doped sapphire crystal.

A laser device for laser resonance ionization includes a wavelength variable grating-type titanium-doped sapphire laser and includes a titanium (Ti) doped titanium sapphire crystal disposed within a resonator. The titanium sapphire crystal is fixedly disposed on a stage. The titanium-doped sapphire crystal can be moved in the optical axis direction by the stage, thereby changing the position of the titanium-doped sapphire crystal. The switching between the wideband mode and the high-output mode can be performed by changing the position of the titanium-doped sapphire crystal.

An apparatus for automatically deterring pest with a light projection on the ground that is perceived as a predator by pests such as birds, which triggers a fear reaction from the birds to leave the area. The apparatus is designed to project a large beam of more than 60 mm diameter in visible light with sufficient power to be seen during daylight. The apparatus is adapted to pan and tilt continuously and randomly within specified limits that are programmed to project the beam in various areas and protect the areas from birds. The apparatus relies on a robotic arm or orientable support mounted on a frame that can be displaced or repositioned easily thanks to a forklift. Methods for activating and controlling the apparatus are also provided.

An illumination device for generating multiple wavelength, narrow linewidth, single longitudinal and single transversal mode emission, includes a laser-medium inside a laser-resonator configured to receive a pump beam from a single pump diode and produce a laser wave. Laser-resonator ingress and egress mirrors are configured to resonate the laser wave. An an OPO-resonator and OPO crystal are configured to receive the laser wave and produce short and long OPO waves. An OPO-resonator ingress mirror is configured to resonate the short OPO wave with the laser-resonator egress mirror. A nonlinear output crystal is configured to receive the short OPO wave and produce at least one output wave, wherein the the laser-resonator egress mirror is configured to emit at least two of the leaking out laser wave and the output waves.

The present invention provides a rotating chalcogenide gain media ring to provide un-precedented power generation with minimal thermal lensing for CW lasing in the mid-IR spectrum.

An apparatus for automatically deterring pest with a light projection on the ground that is perceived as a predator by pests such as birds, which triggers a fear reaction from the birds to leave the area. The apparatus is designed to project a large beam of more than 60 mm diameter in visible light with sufficient power to be seen during daylight. The apparatus is adapted to pan and tilt continuously and randomly within specified limits that are programmed to project the beam in various areas and protect the areas from birds. The apparatus relies on a robotic arm or orientable support mounted on a frame that can be displaced or repositioned easily thanks to a forklift. Methods for activating and controlling the apparatus are also provided.

Disclosed is a laser oscillation device. The laser oscillation device comprises: a first substrate; a second substrate which is provided above the first substrate and forms a wedge cell between the second substrate and the first substrate; a liquid crystal layer, formed by a liquid crystal having the same pitch, which is injected into the wedge cell; and a temperature controller system which is connected to both sides of the wedge cell and controls the temperatures of both sides of the wedge cell to be different from each other.

The present invention provides a rotating chalcogenide gain media ring to provide un-precedented power generation with minimal thermal lensing for CW lasing in the mid-IR spectrum.

A laser oscillation device can prevent a laser medium-circulating pipe from expanding. The laser oscillation device includes a resonator part, which has an introduction port, through which a laser medium is introduced, and a discharge port, from which the laser medium is discharged, and which generates a laser beam, a laser medium-circulating pipe having one end connected to the introduction port, and the other end connected to the discharge port, a blower arranged in the laser medium-circulating pipe, to circulate the laser medium so that the laser medium is introduced from the introduction port to the resonator part, and the laser medium introduced to the resonator part is discharged from the discharge port, and a heat-insulating mechanism which is provided in the laser medium-circulating pipe, to block heat conduction between the laser medium flowing through the laser medium-circulating pipe and the laser medium-circulating pipe.