80 results about "Laser oscillator" patented technology

A ring resonator (10) and a NALM (20) configured as a saturable absorption mechanism constitute a laser oscillator. A multiport BPF (12) is provided to a path through which light propagates in the laser oscillator, the multiport BPF (12) passing light in a prescribed band of the propagating light, and branching light outside of the prescribed band as monitoring light (L). A photodetector (1) detects the monitoring light (L). A control unit (2) controls the oscillation state of the light propagating through the laser oscillator on the basis of the intensity of the monitoring light (L), thereby controlling the mode synchronization of the light propagating through the laser oscillator.

A biological information detection device is disclosed that includes a first laser oscillator that oscillates a first pulsed laser beam adapted for detection of a lactic acid or lactic acid salt; a second laser oscillator that oscillates a second pulsed laser beam adapted for detection of a pyruvic acid; an irradiation mechanism that emits the first pulsed laser beam and the second pulsed laser beam to blood; a light receiving sensor that receives a detected laser beam output from the blood; and a control unit. The control unit outputs oscillation instructions for oscillating the first pulsed laser beam and the second pulsed laser beam, cuts out detected signals provided from the light receiving sensor as time segment data for time periods, and calculates respective quantities of the lactic acid or lactic acid salt and the pyruvic acid in the blood based on the time segment data.

Laser processing device (40) comprising: a clamping table (54) which holds a wafer (10) having a front side (10a) and a back side (10b); a laser beam application means (44) that applies a laser beam to the wafer (10) which is held by the clamping table (54); and a processing feed means (43) that performs a relative processing feed of the clamping table (54) and the application means (44) for a laser beam, wherein the application means for a laser beam comprises a laser oscillator (44b) which oscillates a pulsed laser beam, and a focusing device (44a) which focuses the pulsed laser beam oscillated by the laser oscillator (44b) in order to apply the pulsed laser beam to the wafer (10) which is held by the clamping table (54), and The pulsed laser beam, oscillated by the laser oscillator (44b), includes burst pulses (BP), each of which has several subpulses that are gradually amplified stepwise from a lower energy to a high energy, and the burst pulses (BP) are applied to the wafer (10) to form shielding tunnels (100), each containing a small hole (102) and an amorphous phase (104) surrounding the small hole, wherein the application means (44) is configured for a laser beam to form a circular small hole (102) and a circular amorphous phase (104), each extending from the front side (10a) to the rear side (10b) of the wafer (10), wherein the focusing device (44a) is movable in the direction of the optical axis and configured such that the focal point is positioned at a predetermined position in the wafer (10). is.

This laser device is provided with: a laser oscillator which includes an optical resonator and a pair of electrodes for generating discharge by applying a voltage to a laser gas, and which outputs a first pulsed laser light; a first optical pulse stretcher that transmits a portion of the first pulse laser light, surrounds the other portion of the first pulse laser light by one circle, and outputs a first transmitted light and a first one-circle surrounding light, which have a first shift amount and spatially overlap a portion of the first transmitted light and the first one-circle surrounding light, thereby outputting a second pulse laser light in which the pulse time width of the first pulse laser light has been expanded; and a second optical pulse stretcher that transmits a part of the second pulse laser light, surrounds the other part of the second pulse laser light by one circle, and outputs second transmitted light and second one-circle surrounding light that have a second offset amount different from the first offset amount and spatially overlap a part of the second transmitted light and a part of the second one-circle surrounding light. As a result, a third pulse laser beam having an extended pulse time width of the second pulse laser beam is output.

A wobble laser processing apparatus according to an embodiment of the present invention comprises: a laser oscillator provided to oscillate a laser; and a wobble laser irradiator that is provided to, to process a partial area of a coating electrode which is traveling, irradiate the laser irradiated from the laser oscillator, to a coating electrode in a wobbling pattern, and that is capable of adjusting at least one of a wobbling width, a wobbling height, and a wobbling frequency on the basis of a traveling speed of the coating electrode.

A laser processing method and apparatus for printed circuit boards are provided, which effectively utilize a laser oscillator to optimize processing efficiency and quality. The laser processing method uses a laser oscillator to perform laser processing by applying RF pulses to oscillate the laser. During laser output after the application of the RF pulse ends, the RF pulse is applied again to continue laser oscillation, and a desired duration of laser light is extracted from the continuously oscillating laser for laser processing of the printed circuit board.

A laser machine includes at least one laser oscillator configured to output a laser beam, at least one beam control element configured to control a shape of the laser beam output from the laser oscillator, at least one lens arranged between the beam control element and a workpiece and configured to control a size of the laser beam, the shape of which is controlled by the beam control element, and irradiate the size-controlled laser beam onto the workpiece, and a controller configured to set a machining line width to be formed on the workpiece, determine a rotation angle of the beam control element according to the set machining line width, and control the beam control element to be rotated around a rotation axis parallel to a normal line of a plane of the workpiece according to the determined rotation angle.

A laser handpiece according to an embodiment of the present disclosure may comprise: a main body unit; a laser radiation unit disposed inside the main body unit and configured to radiate a laser toward the front of the main body unit; a lens unit formed in front of the laser radiation unit and configured to refract the laser; a contact unit detachably coupled to the main body unit in front of the main body unit and configured to contact the skin of a person to be treated to irradiate the skin with the laser; a connector configured to be detachably coupled to a cable provided with a power supply line for supplying power and a discharge line for discharging heat generated from the laser radiation unit; and an intake unit formed in the main body unit and configured to draw air toward the connector.

A laser beam application unit of a laser processing machine includes a laser oscillator that emits a laser beam, an fθ main lens that focuses and applies the laser beam which has been emitted from the laser oscillator, to a workpiece held on a holding table, a scan unit that is arranged on an optical path between the laser oscillator and the fθ main lens, scans the laser beam, and guides the resulting scanned laser beam to the fθ main lens, and an fθ sub-lens that is arranged on the optical path between the laser oscillator and the scan unit and converts the laser beam from parallel light into diffused light.

Device (30) for changing the numerical aperture for realigning spatial distributions or spatial positions of several laser beams (LA, LB) incident from a laser oscillator (20) and propagating in the direction of an axis (Z), and for condensing the several realigned laser beams for entry of the beams into a transmission fiber (40), wherein the device for changing the numerical aperture is characterized by: a light-shielding component (326-1, 326-2) provided in an extension of the optical axis of the transmission fiber (40), wherein the light-shielding component (326-1, 326-2) blocks a reflected laser beam, the reflected laser beam being a laser beam traveling from the transmission fiber (40) to the laser oscillator (20); and Several beam spacing change units (32-1, 32-2) for changing beam spacings between the several incident laser beams (LA, LB) in two different directions (X, Y), wherein one of the several beam spacing change units (32-1) is configured to change a beam spacing in a first direction (X) perpendicular to the axis (Z), and another of the several beam spacing change units (32-2) is configured to change a beam spacing in a second direction (Y) different from the first direction (X), wherein for each of the multiple beam spacing change units (32-1, 32-2) a light shielding component (326-1, 326-2) is provided, and each of the light shielding components (326-1, 326-2) is arranged on one side closer to the transmission fiber (40) with respect to the corresponding beam spacing change unit (32-1, 32-2).

To provide a frequency adjustment device capable of uniformly processing a metal film of a vibration element.SOLUTION: A frequency adjustment device 10 that adjusts a frequency of a vibrating element 100 includes a placement portion 1 on which the vibrating element 100 is placed, a laser oscillator 2, a reflector 3 that reflects light L from the laser oscillator 2 and emits the light L toward the vibrating element 100 placed on the placement portion 1, a measurement unit 4 that measures a characteristic of the vibrating element 100, and a control unit 5 that controls the laser oscillator 2 in accordance with the characteristic measured by the measurement unit 4.SELECTED DRAWING: Figure 1

The embodiment of the invention relates to a head suspension assembly and a disk device provided with the same. According to one embodiment, a head suspension assembly includes: a support plate having a base end portion, a tip portion, a lift tab protruding from the tip portion, and a first opening provided in the tip portion; a wiring member provided on the support plate, the wiring member including an elastically deformable gimbal portion facing the front end portion of the support plate; and a head having a slider mounted on the gimbal portion, a head element provided on the slider, and a laser oscillator provided on the slider and facing the first opening. The support plate has a first protrusion provided on the base end side with respect to the first opening and abutting against the central portion of the slider via the gimbal portion, and a second protrusion provided between the first protrusion and the lifting tab and capable of abutting against the gimbal portion.

To provide a semiconductor laser device capable of suppressing a deposition rate of a deposit adhering to a light emission end face of a semiconductor laser element and suppressing deterioration of operation reliability.SOLUTION: The laser oscillator 10 includes at least a laser module 12 having a laser diode bar 12A and a first housing 11 that houses the laser module 12. Each of the plurality of emitters 12A provided in the laser diode bar 12A3 emits the first laser beam LBE, and the wave range of the first laser beam LBE is equal to or less than 550nm. At least during operation of the laser diode bar 12A, the volumetric water content inside the first housing 11 is kept below 200ppmv.SELECTED DRAWING: Figure 1

A high-power fiber laser array includes a pump module array, a pump fiber array, a resonant cavity module array or a power amplifier module array, and a power transfer fiber array. The pump module array, resonant cavity module array, or power amplifier module array are arranged separately, and connected to each other via the pump fiber array. The fiber laser resonators forming the resonant cavity module array are arranged as closely as possible in a linear array, or the fiber laser amplifiers forming the power amplifier module array are arranged as closely as possible in a linear array, thereby shortening the length of the power transfer fiber between each fiber laser resonator or fiber laser amplifier and the beam combining device. This specification can effectively shorten the length of the power transfer fiber in fiber laser array combining, improving the output power and stability of a single fiber laser oscillator or power amplifier.

The present application provides a laser processing apparatus which monitors a state of a laser beam irradiated to a workpiece. The laser processing apparatus performs laser processing on a workpiece, wherein the laser processing apparatus includes: a chuck table which holds the workpiece; a laser beam irradiation unit which irradiates a laser beam to the workpiece held by the chuck table; a photographing unit which photographs light generated when the laser beam is irradiated to the workpiece to form a photographed image; and a control unit, the laser beam irradiation unit having: a laser oscillator; and a condenser lens which condenses the laser beam emitted from the laser oscillator to be irradiated to the workpiece, the control unit having a determination section which determines a state of the laser beam irradiated to the workpiece in accordance with a shape of the light appearing in the photographed image.

The invention discloses a coherent optical communication and forward sensing combined signal generation and demodulation method and system. The system comprises a transmitting end and a receiving end, the transmitting end comprises a polarization time delay module which is used for dividing light generated by the laser module into two pieces of orthogonal polarized light which are respectively used as optical carriers, and introducing a relative time delay between the two optical carriers; the signal modulation module is used for reserving a frequency protection interval at a direct current position of the radio frequency signal, respectively modulating the radio frequency signal to two optical carriers, and generating a direct current frequency domain pilot frequency at the frequency protection interval to obtain signal light; the receiving end comprises a coherent detection module which is used for carrying out coherent detection on signal light to obtain electric signals corresponding to two pieces of orthogonal polarized light; the phase recovery module is used for extracting direct-current frequency domain pilot signals in the two electric signals and then tracking phase noise of a transmitting end and a local oscillator laser by using the direct-current frequency domain pilot signals; and eliminating the phase noise in the communication signal and the sensing signal by using the phase noise, and demodulating the transmitted information.

The present application provides a laser device and a manufacturing method of an electronic device, the laser device according to one aspect includes: a discharge excitation type laser oscillator which outputs pulsed laser in an ultraviolet wavelength region; a first optical pulse stretcher which includes a beam splitter and a plurality of concave mirrors, and which expands a pulse width of the pulsed laser; and a relay lens which includes a first lens and a second lens arranged on an optical path of the pulsed laser after the pulse width is expanded, the first lens being a spherical plano-convex lens, and the second lens having a focal length in a long side direction of a beam cross section of the pulsed laser which is shorter than a focal length in a short side direction.

The present invention provides a laser processing apparatus and a laser processing method that can suppress the transfer of heat to the optical path of a laser beam. [Solution] The laser processing apparatus 2 comprises a holding table 6 for holding a workpiece 1 and a laser beam irradiation unit 8 for irradiating the workpiece 1 with a laser beam. The laser beam irradiation unit 8 includes a laser oscillator 38, a focusing lens 50, and a mask portion 44 disposed between the laser oscillator 38 and the focusing lens 50 to shield a portion of the laser beam. The mask portion 44 has a reflecting portion 56 that reflects the shielded laser beam. The laser beam irradiation unit 8 further includes a heat dissipation portion 45 that receives the reflected light reflected by the reflecting portion 56 and dissipates the heat generated by the reflected light.

A laser system generates laser pulses having a determined carrier-envelope-offset, CEO. The laser system includes a Cr-doped II-VI based laser oscillator system having a resonator cavity, which emits laser pulses having a peak power of at least 0.75 MW. The laser system further includes a nonlinear optical element for spectrally broadening at least a part of the emitted laser pulses irradiated onto the nonlinear optical element to provide the laser pulses with octave-spanning spectral components, and a frequency-doubling element for generating second harmonic spectral components of at least a part of the octave-spanning spectral components. In addition, the laser system includes an f-2f-interferometry device for generating a beating signal of at least a part of the overlapping spectral components exiting the frequency-doubling element and interfering with each other at the f-2f-interferomtry device and for determining and / or controlling the CEO of the emitted laser pulses based on the beating signal.

The present invention comprises: a laser oscillator (12) that emits laser light (L); a processing head (14) that irradiates a workpiece (50) with the laser light (L); a drive device (20) that is capable of driving the processing head (14) in the directions of three mutually orthogonal axes; and an axis movement control unit (32) that controls the operation of the drive device (20) and moves the position of the processing head (14) in accordance with a processing program for irradiating the workpiece (50) with the laser light (L) to process the workpiece (50). During laser processing, the axis movement control unit (32) controls the drive device (20) and moves the processing head (14) so that a processing path, which is a movement path of the processing head (14) with respect to the workpiece (50), becomes a spiral processing path.

The invention relates to the technical field of high-power fiber laser, in particular to a high-beam-quality fiber laser oscillator and an implementation method thereof. The invention relates to a high-beam-quality fiber laser oscillator which comprises a pumping source, a pumping beam combiner, a high-reflection grating, a gain fiber, a reverse beam combiner and a low-reflection grating, and the high-reflection grating and the low-reflection grating form a resonant cavity. Wherein pump light output by the pump source is injected into the gain optical fiber through the pump beam combiner; one end of the gain fiber is welded with the high-reflectivity grating to form a total reflection end of the resonant cavity; the other end of the gain optical fiber is welded with an input signal optical fiber of the reverse beam combiner; the output end of the reverse beam combiner is welded with the low-reflection grating to form the output end of the resonant cavity; and the reverse beam combiner is embedded in the resonant cavity. According to the invention, high-order mode oscillation is directly suppressed in the cavity, energy waste caused by filtering after generation is avoided, the system efficiency is higher, the structure is simple and compact, the environmental interference resistance is high, and the reliability is higher.

A laser apparatus according to an aspect of the present disclosure includes a laser oscillator configured to emit a pulse laser beam, and a first optical pulse stretcher, a second optical pulse stretcher, and a third optical pulse stretcher that are disposed on an optical path of the pulse laser beam. When L1 represents an optical path length of a delay optical path of the first optical pulse stretcher, L2 represents an optical path length of a delay optical path of the second optical pulse stretcher, L3 represents an optical path length of a delay optical path of the third optical pulse stretcher, and n represents an integer equal to or larger than two, L2 is an integral multiple of L1 by an integer equal to or larger than two and L3 satisfies the following condition: (n−0.75)×L1≤L3≤(n−0.25)×L1.

The objective is to provide an optical system for a laser processing apparatus equipped with at least one protective glass that can compensate for and correct the shift in focal length caused by changes in the refractive index and radius of curvature of the lens or protective glass due to the heat of the laser beam, thereby preventing the optical system from shifting focus and enabling proper laser processing. [Solution] To achieve this objective, an optical system for a laser processing apparatus is employed for laser processing by irradiating a workpiece with a laser beam emitted from a laser oscillator to form a spot, comprising a collimating lens for making the laser beam into parallel light, a focusing lens for focusing the parallel light, and at least one protective glass, wherein the dn1 / dT of the collimating lens is a negative value, the dn2 / dT of the focusing lens is a negative value, and the dn3 / dT of the protective glass is a positive value.

A gas laser device has a laser oscillator including a pair of discharge electrodes disposed opposite each other and generating light with a laser gas by applying a voltage, and a laser side resonator that resonates the light, an amplifier including an amplifying section and an amplifying side resonator, a beam splitter that reflects a part of the light from the laser side resonator, a light sensor that detects the light reflected by the beam splitter, and a processor that controls the voltage based on an output of the light sensor. The amplifying side resonator includes a back mirror and an amplifying side output coupling mirror, and the laser side resonator includes a grating and a laser side output coupling mirror. In a case where the voltage is lower than a threshold value of the voltage, the processor maintains the voltage at a fixed value above the threshold value.

To provide a polar axis alignment support device for an equatorial telescope capable of supporting polar axis alignment of the equatorial telescope by simply and highly accurately directing an azimuth of a polar axis side support leg of a tripod to a polar axis direction by using a cross line laser beam without being affected by a magnetic field of the equatorial telescope with a motor.SOLUTION: After leveling by a digital angle meter 36 of a device main body 31, a radiation port 37a of a cross line laser beam 30 is directed to the true north by an electronic compass 35. Thereafter, the installation surface of the equatorial telescope 15 is irradiated with the cross-line laser beam 30 from the cross-line laser oscillator 37. Therefore, the horizontal line L1 and the vertical line L2 are projected onto the installation surface. Next, the polar-axis-side support leg 11 of the tripod 14 is arranged on the north side of the optical-axis L3 on the vertical line L2, the west-side support leg 12 is arranged on the west side of the optical-axis L3 on the horizontal line L1, and the east-side support leg 13 is arranged on the east side of the optical-axis L3 on the horizontal line L1.SELECTED DRAWING: Figure 1

The invention relates to the field of ultrafast laser technology and high-energy laser physics, in particular to a femtosecond laser amplifier time synchronization device utilizing fast and slow loop feedback, which comprises a laser oscillator used for generating femtosecond pulse laser with repetition frequency locked; the amplifier is used for receiving and amplifying the femtosecond pulse laser; the optical beam splitting component is used for splitting the output of the laser oscillator into a transmission light beam and a reflection light beam; the first delay line is used for providing slow loop feedback compensation so as to compensate for long-term time drift; the second delay line is used for providing fast loop feedback compensation so as to compensate for fast time drift; the balance optical cross-correlation assembly is used for receiving the reference light and the light beam output from the second delay line and generating an error signal representing time drift; and the active control assembly is used for controlling the electric control displacement table and the piezoelectric ceramics to realize time sequence synchronization between the laser oscillator and the amplifier. The method can improve the precision of controlling laser pulse time sequence synchronization of the oscillator and the amplifier.

The invention belongs to the technical field of laser oscillators, and particularly relates to a pump light parametric oscillator based on a composite crystal. The optical parametric oscillator comprises a pumping source and a resonant cavity, the pumping source comprises a laser and a gain medium for receiving initial laser emitted by the laser, the laser and the gain medium are sequentially arranged in the optical path direction of the optical parametric oscillator, and the gain medium is a composite crystal. The composite crystal comprises neodymium-doped yttrium aluminum garnet and yttrium aluminum garnet fixedly connected with the neodymium-doped yttrium aluminum garnet; the resonant cavity comprises a nonlinear crystal, and the nonlinear crystal comprises selenium gallium barium. The optical parametric oscillator provided by the invention can simultaneously realize high-energy output of the pumping source, high-power and high-stability output of the pumping source and high-energy output of the resonant cavity covering the whole middle and far infrared band, and has wide application prospects in the fields of middle infrared confrontation, environment and atmosphere monitoring and remote sensing.

The present invention provides a laser processing apparatus that allows for easy attachment and detachment of the laser light source from the optical path member while ensuring airtightness between the laser output section and the adjacent optical path member. [Solution] The laser marker 1 comprises a laser light source 10 connected to a processing laser oscillator 9 and a telescope 7 having a cylindrical portion 7A extending forward from the processing laser oscillator 9; a shutter unit 6 positioned adjacent to the laser light source 10 in the forward direction, opening in the rearward and upward directions, and having a recess 6A that receives the front end 7A1 of the cylindrical portion 7A of the telescope 7; a sealing member 30 having a through hole 30A through which the end 7A1 of the cylindrical portion 7A is inserted, and a sealing portion 30B that elastically deformably seals the joint between the telescope 7 and the shutter unit 6, and which can be housed in the recess 6A of the shutter unit 6, wherein the thickness D of the sealing member in the forward direction is greater than the distance d from the bottom surface 6A2 of the recess 6A to the retaining plate 12 in the forward direction.

The invention provides a laser processing apparatus and a laser focal position adjusting method using the same. A laser processing device (100) is provided with at least a laser oscillator that generates a laser beam (LB), a laser head (60) that irradiates the laser beam (LB) toward a workpiece, and a manipulator (40) to which the laser head (60) is attached. The manipulator (40) has a robot arm (41), a tip shaft (J6) that is rotatable about an axis (RA) and is provided at the tip of the robot arm (41), and a connection member (50) that connects the tip shaft (J6) and the laser head (60). The connection member (50) is provided with a measuring instrument attachment part (51a) for detachably attaching the measuring instrument (80). The measuring instrument (80) has a reference point corresponding to the focal position of the laser beam (LB).