Abstract: The present invention discloses a large-scale semi-rigid structure airship, relating to the technical field of aerostats, which comprises a ship body, vector side thrusters, a vector tail thruster, an X-shaped inflatable tail fin, air cushions, and a pod, wherein the ship body comprises a pretensioned capsule and a tensegrity keel; the pretensioned capsule is sleeved onto an outer surface of the tensegrity keel in a pretensioning mode; the vector side thrusters are provided at lower-side portions of the ship body; the vector tail thruster is provided at the tail of the ship body; the X-shaped inflatable tail fin is arranged at the tail of the ship body in an X shape; the air cushions are provided at lower portions of the ship body; and the pod is provided at a lower portion of the ship body.

Abstract: The present invention relates to the field of radiation detection, and provides a CdZnTe aerial inspection system and an inspection method. The inspection system comprises a CdZnTe spectrometer (10) and an aircraft (20). The aircraft (20) flies and carries the CdZnTe spectrometer (10) to realize a function of aerial inspection, thereby improving operating efficiency of nuclear radiation monitoring. The CdZnTe spectrometer (10) has high energy resolution, a small volume, a light weight, and desirable portability. By combining the CdZnTe spectrometer (10) and the aircraft (20), the present invention enables high measurement precision, a long operation duration, and an aerial access to a site of a nuclear accident to perform operations and inspect the site, thus reducing radiation exposure received by a person entering the site, and providing support for rescue operation.

Abstract: The present application is directed to a tuning arm system for use in a tunable external cavity diode laser system and includes a tuning arm body, at least one prism support coupled to the tuning arm body, at least one component support coupled to the prism support and configured to support at least one optical component therein, the component support manufactured from a magnetic material, and at least one magnetic device positioned proximate to the component support.

Abstract: A laser-emitting device may be coupled to an electro-optically controlled wavelength actuator. An electro-optically controlled wavelength actuator may be a holographic wavelength actuator or a liquid crystal wavelength actuator. The electro-optically controlled wavelength actuator may function as a tunable diffraction grating for external cavity lasers.

Abstract: Tunable external cavity lasers are used in applications such as interferometry, FM spectroscopy, and optical communications equipment testing. Mode hop free high bandwidth frequency modulation operation is desired in a tunable external cavity laser. This application describes new and novel techniques for controlling the output wavelength of a tunable external cavity laser while suppressing mode hop.

Abstract: An external cavity diode laser system includes a thin film filter. The output facet of the laser diode is coated with a partial reflection coating and the cavity side facet is coated with an anti-reflection coating. A roof-top prism or corner cube retroreflector serves as the laser cavity end reflector and provides stability of the wavelength of the output over time. The laser cavity lies between the partial reflective coated facet of the laser diode and retroreflector. A collimating lens and a thin film filter are located between the end reflector and the laser diode cavity side facet. The lasing wavelength can be adjusted during either manufacture or operation by tilting the filter. Also included is thermal compensation in the mounting for the retroreflector to compensate for thermal movement of the laser system cavity.

Abstract: The present invention is useful in growing complex films with high quality (low lattice strain, large grain size, high degree of perfection) at high rates and large area, and high efficiency use of material. A solid-state film is grown from a liquid, where atoms are supplied continuously by vapor deposition onto the liquid surface. The desired film material grows from or is precipitated from the liquid flux, which is in thermodynamic equilibrium with the desired film. The desired film growth starts at a substrate interface. If this is a biaxial textured surface suitable in chemical reactivity and lattice constant, the growth will be epitaxial with the substrate. The atomic mixture that forms the deposited film is supplied by the arrival of the atoms from a vapor onto the surface of the liquid flux. An important additional factor in the case of an oxide such as the HTSC YBCO is that activated oxygen needs to be present, along with molecular oxygen.

Abstract: A second harmonic generation laser system comprising: a non-linear frequency converting medium; and an external cavity pump laser that produces optical energy at a single mode and at a single frequency and that is disposed to provide the optical energy to the non-linear frequency converting medium.

Abstract: A system is provided for producing wavelength tunable laser light and a signal indicative of the wavelength of the produced laser light; a laser cavity includes an optical gain medium and a wavelength selective element disposed in a path of light emitted by the optical gain medium such that changing a position of the element changes a wavelength emitted by the medium; a position sensor that senses position of the element; position signal circuitry that produces a position signal indicative of position of the element sensed by the position sensor; a storage medium storing at least one position signal corresponding to a respective predetermined position of the element; comparison circuitry for comparing the produced position signal with the at least one stored position signal and for producing a comparison result indicative of whether the element has reached to the predetermined position; marker signal circuitry providing an external wavelength marker signal when the comparison result indicates that the element

Abstract: A laser-emitting device may be coupled to an electro-optically controlled wavelength actuator. An electro-optically controlled wavelength actuator may be a holographic wavelength actuator or a liquid crystal wavelength actuator. The electro-optically controlled wavelength actuator may function as a tunable diffraction grating for external cavity lasers.

Abstract: A second harmonic generation laser system comprising: a non-linear frequency converting medium; and an external cavity pump laser that produces optical energy at a single mode and at a single frequency and that is disposed to provide the optical energy to the non-linear frequency converting medium.

Abstract: Tunable external cavity lasers are used in applications such as interferometry, FM spectroscopy, and optical communications equipment testing. Mode hop free high bandwidth frequency modulation operation is desired in a tunable external cavity laser. This application describes new and novel techniques for controlling the output wavelength of a tunable external cavity laser while suppressing mode hop.

Abstract: A laser apparatus and method with compact cavity design that provides suppression of source spontaneous emission (SSE) and amplified spontaneous emission (ASE) light with minimal loss. The laser comprises a gain medium emitting a light beam along an optical path, a tuning element positioned in the optical path and configured feed back light of a selected wavelength to the gain medium and configured to define a first output beam directed along a first output path, a partial reflector located in the optical path and positioned to create a second output beam directed along a second output path substantially parallel to the first output path; and having a spontaneous emission component that is spatially separated from the selected wavelength. The second output beam can be coupled into optical fiber and produce a coherent light source with high spectral purity and tunable wavelengths.

Abstract: A laser apparatus and method with compact cavity design that provides suppression of source spontaneous emission (SSE) and amplified spontaneous emission (ASE) light with minimal loss. The laser comprises a gain medium emitting a light beam along an optical path, a tuning element positioned in the optical path and configured feed back light of a selected wavelength to the gain medium and configured to define a first output beam directed along a first output path, a partial reflector located in the optical path and positioned to create a second output beam directed along a second output path substantially parallel to the first output path; and having a spontaneous emission component that is spatially separated from the selected wavelength. The second output beam can be coupled into optical fiber and produce a coherent light source with high spectral purity and tunable wavelengths.

Abstract: The present invention is useful in growing complex films with high quality (low lattice strain, large grain size, high degree of perfection) at high rates and large area, and high efficiency use of material. A solid-state film is grown from a liquid, where atoms are supplied continuously by vapor deposition onto the liquid surface. The desired film material grows from or is precipitated from the liquid flux, which is in thermodynamic equilibrium with the desired film. The desired film growth starts at a substrate interface. If this is a biaxial textured surface suitable in chemical reactivity and lattice constant, the growth will be epitaxial with the substrate. The atomic mixture that forms the deposited film is supplied by the arrival of the atoms from a vapor onto the surface of the liquid flux. An important additional factor in the case of an oxide such as the HTSC YBCO is that activated oxygen needs to be present, along with molecular oxygen.

Abstract: An atomic absorption apparatus using a laser for producing a light beam having a characteristic frequency f, typically ranging from several MHz to several GHz, and a characteristic polarization for measuring the absorption of that light beam by atoms of interest. The apparatus has a modulator to generate a modulating signal to modulate the characteristic frequency f and produce a phase-modulated light beam. The apparatus includes a domain where the specific atoms are located. This domain is positioned in the path of the phase-modulated light beam such that the phase-modulated light beam encounters the specific atoms when passing through the domain and some of the specific atoms absorb a portion of the phase-modulated light beam. Typically, the domains containing the atoms of interest include process chambers for vacuum coating, ion milling, sputtering, mass spectroscopy vapor coating or deposition, and the like.