Abstract: A scanning type laser induced spectrum surface range analysis and detection system includes a laser emitting head connected to an external laser inducing light source, which generates lasers emitted through the laser emitting head, so as to generate laser induced plasma. A focusing optical device converges induction excited laser beams emitted by the laser emitting head onto a surface of a tested sample. Then, a reflector collects wide spectral range induced plasma scattered light signals of the tested sample and converges the signals into a light collecting device. The light collecting device converges induced plasma scattered light into an optical fiber and transmits the induced plasma scattered light to an external spectrograph; and the external spectrograph divides a spectrum formed by the plasma to obtain spectral strength data of different wavelengths.

Abstract: The present invention relates to a method for detecting steel sample components by using a multi-pulse laser induced plasma spectral analysis device, and in particular, to a method for detecting steel sample components by using a multi-pulse laser induced plasma spectral analysis device that includes picosecond and nanosecond laser pulse widths. A laser induced light source is a laser light source that includes nanosecond and picosecond ultrashort pulses, and one pulse laser device can be used to generate two pulse lasers, namely, a nanosecond and a picosecond laser; the two pulse lasers pass through a same output and focusing light path, so as to ensure that the two pulse lasers are focused on a same position of a sample to be detected; a surface of the sample is irradiated by using a first beam of nanosecond laser pulse to generate plasmas; subsequently, the plasmas are irradiated by using a second beam of picosecond laser pulse to enhance spectral line emission.

Abstract: The present disclosure discloses a scanning type laser induced spectrum surface range analysis and detection system. A laser emitting head is connected to an external laser inducing light source. The external laser inducing light source generates lasers emitted through the laser emitting head, so as to generate laser induced plasma. A focusing optical device converges induction excited laser beams emitted by the laser emitting head onto a surface of a tested sample. Then, a reflector collects wide spectral range induced plasma scattered light signals of the tested sample and converges the signals into a light collecting device. The light collecting device converges induced plasma scattered light into an optical fiber and transmits the induced plasma scattered light to an external spectrograph; and the external spectrograph divides a spectrum formed by the plasma to obtain spectral strength data of different wavelengths.

Abstract: The present invention relates to a method for detecting steel sample components by using a multi-pulse laser induced plasma spectral analysis device, and in particular, to a method for detecting steel sample components by using a multi-pulse laser induced plasma spectral analysis device that includes picosecond and nanosecond laser pulse widths. A laser induced light source is a laser light source that includes nanosecond and picosecond ultrashort pulses, and one pulse laser device can be used to generate two pulse lasers, namely, a nanosecond and a picosecond laser; the two pulse lasers pass through a same output and focusing light path, so as to ensure that the two pulse lasers are focused on a same position of a sample to be detected; a surface of the sample is irradiated by using a first beam of nanosecond laser pulse to generate plasmas; subsequently, the plasmas are irradiated by using a second beam of picosecond laser pulse to enhance spectral line emission.

Abstract: The present invention provides a laser system for detecting biomechanical properties of the cornea, which comprises a laser for emitting a pulsed laser beam, a beam transmission module, a collecting-filtering module and a spectroscopic analysis unit, the beam transmission module is used for transmitting the laser beam and focusing the laser beam onto the cornea, on the surface of which a laser-induced plasma signal is generated; the laser-induced plasma signals are collected and filtered by the collecting-filtering module; the spectroscopic analysis unit performs spectroscopic analysis on the laser-induced plasma signal to determine the biomechanical properties of the cornea. The present invention further provides a method for detecting the biomechanical properties of the cornea with the above laser system. The same laser system for LASIK surgery is utilized in the present invention to measure the biomechanical properties of the cornea timely and accurately, which improves work efficiency.

Abstract: A large aperture uniform-amplification laser module including a longer, larger diameter crystal bar is disclosed. The laser module includes a ring-shaped pump bar structure, a crystal bar, a glass sleeve, and a structural component. The pump bar structure includes pump blocks composed of a bar, a cooling heat sink, and a cooling pipe. The bar is connected with the heat sink, and a cooling water channel is provided inside of the cooling heat sink. Heat sinks are provided with outlet pipes and an inlet pipes to communicate with water channels, which are connected in series through the cooling pipes to form a ring shape. The bar is close to a center axis of the ring-shaped pump bar structure. The crystal bar is provided in the glass sleeve. A plurality of the ring-shaped pump bar structures are sleeved on the glass sleeve along the length of the glass sleeve.

Abstract: The present invention provides a laser system for detecting biomechanical properties of the cornea, which comprises a laser for emitting a pulsed laser beam, a beam transmission module, a collecting-filtering module and a spectroscopic analysis unit, the beam transmission module is used for transmitting the laser beam and focusing the laser beam onto the cornea, on the surface of which a laser-induced plasma signal is generated; the laser-induced plasma signals are collected and filtered by the collecting-filtering module; the spectroscopic analysis unit performs spectroscopic analysis on the laser-induced plasma signal to determine the biomechanical properties of the cornea. The present invention further provides a method for detecting the biomechanical properties of the cornea with the above laser system. The same laser system for LASIK surgery is utilized in the present invention to measure the biomechanical properties of the cornea timely and accurately, which improves work efficiency.

Abstract: A large-aperture laser amplifier side-pumped by a multi-dimensional laser diode stack, which comprises: multiple pumping light source assemblies; a laser medium, of which the shape is a prismoid, wherein both the upside surface and the underside surface of the prismoid are polygonal, and the number of the edges of the polygon is the same as the number of the pumping light source assemblies; and a cooling device. Each side of the laser medium is provided with a pumping light source assembly; the pumping light emitted from the semiconductor laser diode stack is shaped by the beam shaping element, coupled by the coupling duct, and then enters from the side of the laser medium for side-pumping, and thereby amplifying the laser beam incident from the upside surface of the prismoid of the laser medium.

Abstract: A large aperture uniform-amplification laser module including a longer, larger diameter crystal bar is disclosed. The laser module includes a ring-shaped pump bar structure, a crystal bar, a glass sleeve, and a structural component. The pump bar structure includes pump blocks composed of a bar, a cooling heat sink, and a cooling pipe. The bar is connected with the heat sink, and a cooling water channel is provided inside of the cooling heat sink. Heat sinks are provided with outlet pipes and an inlet pipes to communicate with water channels, which are connected in series through the cooling pipes to form a ring shape. The bar is close to a center axis of the ring-shaped pump bar structure. The crystal bar is provided in the glass sleeve. A plurality of the ring-shaped pump bar structures are sleeved on the glass sleeve along the length of the glass sleeve.

Abstract: A passively mode-locked picosecond laser device comprising a pump source, a laser crystal, a laser cavity, a mode-locked output structure is provided. In the device, the pump source is placed at the side of the incident end surface of the laser crystal; the laser cavity includes a plane reflective mirror and a first plano-concave mirror, the reflective mirror is placed opposite to the concave surface of the plano-concave mirror and located on the position of the focal radius of the plano-concave mirror. The normal direction of the reflective mirror and the axis of the plano-concave mirror form a small angle therebetween; the laser generated from the laser crystal oscillates in the laser cavity, and output through the mode-locked output structure. The device uses a stable cavity design of the equivalent confocal cavity, which can increase the optical path, reduce the repetition frequency, and significantly reduce the cavity length and volume.

Abstract: A passively mode-locked picosecond laser device comprising a pump source, a laser crystal, a laser cavity, a mode-locked output structure is provided. In the device, the pump source is placed at the side of the incident end surface of the laser crystal; the laser cavity includes a plane reflective mirror and a first plano-concave mirror, the reflective mirror is placed opposite to the concave surface of the plano-concave mirror and located on the position of the focal radius of the plano-concave mirror. The normal direction of the reflective mirror and the axis of the plano-concave mirror form a small angle therebetween; the laser generated from the laser crystal oscillates in the laser cavity, and output through the mode-locked output structure. The device uses a stable cavity design of the equivalent confocal cavity, which can increase the optical path, reduce the repetition frequency, and significantly reduce the cavity length and volume.