31results about "Optical devices for laser" patented technology

A new laser beam transport system comprises a structure and at least one detector. The structure comprises an inner tube, defining an input end and an output end, and an outer tube surrounding the inner tube so as to define a volume therebetween. The volume is closed such that ambient radiation cannot enter the volume. The at least one detector is configured to detect the presence of radiation in the volume and operable to generate a signal if an amount of radiation above a threshold level is detected. A new laser system comprises such a laser beam transport system and a radiation source operable to generate a radiation beam that propagates through an interior volume defined by the inner tube, from the input end to the output end. A new laser-produced plasma radiation source comprises such a laser system.

The invention relates to a laser system (1) comprising a solid amplifying medium (2) capable of emitting an amplified beam (4) in a propagation direction (D), the amplified beam having a first angle of divergence in a first plane (Px) including the propagation direction, and a second angle of divergence in a second plane including the propagation direction and separate from the first plane, the second angle of divergence being separate from the first angle of divergence; and an optical device (3).According to the invention, the optical device comprises a lens (31) arranged so as to refract the amplified beam into an outgoing beam (5), the lens having a first radius of curvature in the first plane and a second radius of curvature in the second plane, the second radius of curvature being separate from the first radius of curvature.

Provided is a two-photon spectroscopy including a light source configured to generate first laser light having a pulse, a pulse width correction device configured to receive the first laser light to output a second laser light, an optical system through which the second laser light passes, a first two-photon sensor configured to measure a first pulse width of the first laser light generated from the light source, and a second two-photon sensor configured to measure a second pulse width of the second laser light passing through the optical system, wherein the pulse width correction device corrects a difference between the first pulse width and the second pulse width.

Disclosed herein are optical amplifier devices, optical amplifier assembly, and optical amplifier systems. Example embodiments may include: a plurality of input optical ports, each being configured to receive one of a plurality of input optical signals; a plurality of output optical ports, each being configured to output one of a plurality of output optical signals; a plurality of tap photodiodes, each respectively being connected to one of the plurality of input optical ports and the plurality of output optical ports; a wavelength division multiplexer configured to receive the input optical signal from each of the plurality of input optical ports and an optical input from a laser pump device and output a plurality of pumped optical signals; a plurality of erbium-doped fiber coils, each having a first end configured to receive one of the plurality of pumped optical signals and a second end configured to output an amplified optical signal; and an optical isolator configured to receive, for each of the plurality of erbium-doped fiber coils, the amplified optical signal and output the plurality of output optical signals, wherein the plurality of output optical ports are configured to receive one of the plurality of output optical signals.

Embodiments of this application provide a frequency difference adjuster (10C), a frequency difference adjustment method, a laser generation apparatus (100), and an electronic device (1000). A tunable comb filter (1C) is reused to filter a first optical signal and a second optical signal, to obtain a first filtered optical signal and a second filtered optical signal. Optical-to-electrical conversion is performed on the first filtered optical signal and the second filtered optical signal, to obtain a first filtered electrical signal and a second filtered electrical signal. A frequency of the first optical signal and a frequency of the second optical signal are obtained respectively based on the first filtered electrical signal and the second filtered electrical signal. Then, a first laser (A) is controlled to adjust the frequency of the output first optical signal, so that a frequency difference between the first optical signal and the second optical signal remains at a first frequency difference. In embodiments of this application, the tunable comb filter (1C) is used, and an adjusted frequency difference range is larger. In addition, in a scenario in which the tunable comb filter (1C) is reused, the frequency difference between the first optical signal and the second optical signal relative to the tunable comb filter (1C) remains stable, and there is no need to perform temperature calibration on a start frequency of the tunable comb filter (1C).

To provide a cost-effective light source unit and method for generating laser light having a wide spectrum.SOLUTION: A light source unit (100) for an imaging device includes a beam extraction unit (106 and 302) configured to receive broadband laser light (104), to direct at least a part of the broadband laser light (104) having first wavelength into an amplifier beam path (108), and to direct residual laser light into a first illumination beam path (110). The light source unit (100) further includes an optical amplifier unit (112) arranged in the amplifier beam path (108) and configured to amplify the laser light having the first wavelength. The light source unit (100) further includes a frequency changing unit (114) arranged in the amplifier beam path (108) and configured to generate laser light having second wavelength from the amplified laser light having the first wavelength.SELECTED DRAWING: Figure 1

A scanning optical fiber includes: a fiber core having a proximal region and a distal region; and a cover member formed of a single seamless member and covering at least a portion of the core. The cover member includes a tubular main section that covers at least a portion of the distal region excluding an end portion of the core, a protrusion protruding from a distal end of the main section at only one side of the core in a radial direction and arranged alongside the end portion in the radial direction, and a large diameter section provided at a proximal side relative to the distal end of the main section and folded in a longitudinal direction of the main section into a shape that protrudes radially outward.

The invention relates to an optical device (20) for filtering laser radiation. The device (20) has a wavelength-selective element (28), a first Fabry-Perot interferometer (10), a polarizer (36) and a lambda / 4 phase shifter (38). The optical axis of the Fabry-Perot interferometer (10) is oriented at an angle of more than 0° and less than 6° with respect to a laser beam arriving at the Fabry-Perot interferometer (10). The Fabry-Perot interferometer (10) is configured not only to couple out an undesired radiation component (30) of a primary laser beam (24) arriving at the Fabry-Perot interferometer (10), but also to couple out an undesired radiation component (52) of a secondary laser beam (46) reflected by the laser beam target (40). Preferably, the device (20) comprises at least one further Fabry-Perot interferometer. Further preferably, the device (20) comprises a telescope device (70) for widening the primary laser beam (24) arriving at the Fabry-Perot interferometer (10). The invention also relates to a laser apparatus having at least one such device (20). Preferably, the laser apparatus comprises an amplifier system arranged between two devices (20). Particularly preferably, the laser apparatus is configured to generate EUV radiation. To this end, the laser beam target (40) can be present in the form of a droplet.

The specification discloses a polarization control laser power quantum stabilization device, method and laser emitting equipment to improve the stability of laser power. The device comprises a laser power adjusting unit configured to adjust the laser polarization state of linearly polarized light output by a laser by using a polarization controller, and output the to-be-stabilized power laser after polarization maintaining transmission; and a feedback control unit configured to take the to-be-stabilized power laser as a monitoring object, introduce it into an atomic clock, change the output frequency of the atomic clock, and adjust the laser polarization state in the laser power adjusting unit based on the deviation between the output frequency and a given output frequency by using a feedback control method to stabilize the power of the output laser. The device has strong environmental interference resistance, reduces the influence of laser polarization change in the traditional method on power stability, improves the sensitivity and response capability of the system to small changes in stable power, and more accurately controls the stable laser power.

A laser system and method. In one example, the laser system includes an optical pulse stretcher configured to stretch pulse durations of an input train of input pulses to produce a train of stretched laser pulses, a pulse replicator module configured to increase a pulse repetition rate of the train of stretched laser pulses to produce a modified pulse train of laser light, a fiber power amplifier configured to amplify the modified pulse train to produce amplified laser pulses, and a pulse compressor that temporally compresses the amplified laser pulses to produce amplified and compressed laser pulses. The system may further include a nonlinear frequency conversion stage comprising at least one nonlinear crystal.

The invention relates to a device (10) for spectral broadening of a pulsed laser beam (12) by means of self-phase modulation, having the features of claim 1, and to a laser arrangement (32) for spectral broadening of a pulsed laser beam (12) by means of self-phase modulation, having the features of the additional independent claim.

There is described a laser pulse generator, comprising: one or more seed laser sources for generating a plurality of sequentially-timed seed pulses; input optics arranged to direct the plurality of sequentially-timed seed pulses through gain medium; the gain medium configured to be pumped by pump diodes to increase the energy of the pulses; and synchronisation optics arranged to guide the plurality of pulses from the gain medium along respective delay paths to temporally synchronise the pulses at one or more targets. Spatial recombination may also be included. Corresponding methods are described.

Embodiments herein describe a path length adjuster for, e.g., adjusting the length of an optical cavity of a laser. In one embodiment, the path length adjuster includes a circulator element for ensuring unidirectional lasing. The path length adjuster may also include one or more focusing elements such as a focusing lens and / or a collimator which directs received laser light at a mirror. The mirror is mounted on an actuator that moves the mirror in a direction parallel with the propagation of the laser light, thereby increasing or reducing the length of the ring cavity.

A laser apparatus includes a laser oscillator including an optical resonator and a pair of electrodes that apply a voltage to a laser gas to cause discharge, and configured to output a first pulse laser beam, a first optical pulse stretcher configured to output a second pulse laser beam for which a pulse time width of the first pulse laser beam is extended by transmitting a part of the first pulse laser beam, making the other part circulate once, and outputting first transmitted light and first once-circulating light that spatially partially overlap with a first shift amount, and a second optical pulse stretcher configured to output a third pulse laser beam for which a pulse time width of the second pulse laser beam is extended by transmitting a part of the second pulse laser beam, making the other part circulate once, and outputting second transmitted light and second once-circulating light that spatially partially overlap with a second shift amount, which is different from the first shift amount.

A sub-nanosecond laser system is disclosed. The sub-nanosecond laser system may include: a pump laser source operable to generate a pump laser beam having a pump wavelength; a first pump beam splitter operable to receive the pump laser beam and split the pump laser beam into at least a first split pump laser beam and a second split pump laser beam; a passively Q-switched seed laser operable to receive the first split pump laser beam and generate a seed laser beam; and an amplifier assembly operable to receive the second split pump laser beam and the seed laser beam. The amplifier assembly may include one or more amplifiers arranged in series in a multi-stage configuration, arranged in a multi-pass configuration, or a combination thereof.

The present disclosure provides methods and systems for flight velocimetry employing at least one bleaching laser, at least one detection laser, at least one dichroic mirror, an objective, a detection system, and a nano stage to bleach a dye to form a bleached blot in a flow pathway.

A dual-path acoustic-optic interference-based ultra-high speed frequency division method for a laser pulse repetition frequency, relating to the technical field of pulse laser regulation. The method comprises: performing precise imaging, by means of a 4-F imaging system, on AOM acoustic wave fields propagating in opposite directions, implementing fast switching of an output diffraction order by means of an interference effect of an acoustic-optic diffraction amplitude, so that a pulse sequence of a mode-locked laser is alternately sent to transmission and diffraction directions, and the optical phase of a diffraction pulse is adjusted by using an average phase of two AOMs, thereby implementing high-efficiency high-contrast phase-controllable frequency division of a high-power laser pulse having an output repetition frequency up to several GHz. Also provided is a dual-path acousto-optic interference-based ultra-high speed frequency division system for a laser pulse repetition frequency, comprising: a synchronically radio frequency signal encoding module, a dual-modulator acousto-optic modulation module, and a pulsed light waveform monitoring module. The present invention is an important expansion of a mode-locked laser high-frequency coherent modulation technique and has important application prospects.

The invention relates to an apparatus (5) for combining a plurality of coherent laser beams (3.1,..., 3.N), comprising: a splitting device (4) for splitting an input laser beam (9) into the plurality of coherent laser beams (3.1,..., 3.N), a plurality of phase setting devices (6.1,..., 6.N) for setting a respective phase (δφa + Δφa) of one of the coherent laser beams (3.1,..., 3.N), and a beam combining device (10) for combining the coherent laser beams (3.1,..., 3.N) emanating from a plurality of grid positions (8.1,..., 8.N) of a grid arrangement, wherein the beam combining device (10) has a microlens arrangement (11) having at least two microlens arrays (17a,b). The apparatus (5) has a control device (15), which is configured to set the respective phase (δφa + Δφa) of one of the coherent laser beams (3.1,..., 3.N) according to an arrangement of the respective grid position (8.1,..., 8.N) within the grid arrangement in order to combine the coherent laser beams (3.1,..., 3.N) to form at least one laser beam (12) diffracted in a different order of diffraction than the zeroth order of diffraction, and / or which is configured to vary the respective phase (δφa + Δφa) of one of the coherent laser beams (3.1,..., 3.N) according to an arrangement of the respective grid position (8.1,..., 8.N) within the grid arrangement in order to change an order of diffraction in which the at least one combined laser beam (12) is diffracted. The invention also relates to an associated laser system (1) and to a method for combining a plurality of coherent laser beams (3.1, 3.2, 3.3), in particular by means of such an apparatus (5).

Disclosed herein are optical amplifier devices, optical amplifier assembly, and optical amplifier systems. Example embodiments may include: a plurality of input optical ports, each being configured to receive one of a plurality of input optical signals; a plurality of output optical ports, each being configured to output one of a plurality of output optical signals; a plurality of tap photodiodes, each respectively being connected to one of the plurality of input optical ports and the plurality of output optical ports; a wavelength division multiplexer configured to receive the input optical signal from each of the plurality of input optical ports and an optical input from a laser pump device and output a plurality of pumped optical signals; a plurality of erbium-doped fiber coils, each having a first end configured to receive one of the plurality of pumped optical signals and a second end configured to output an amplified optical signal; and an optical isolator configured to receive, for each of the plurality of erbium-doped fiber coils, the amplified optical signal and output the plurality of output optical signals, wherein the plurality of output optical ports are configured to receive one of the plurality of output optical signals.

A fiberized acousto-optic device for shifting a frequency of light, comprising: a first optical fiber section that is configured to receive light; a fiber beam splitter (3) connected to the first optical fiber section (2a); a second optical fiber section (2b) connected to the fiber beam splitter (3); an acousto-optic modulator (5) which is optically coupled the second optical fiber section (2b) and is configured to shift a frequency of at least a portion of the light, thereby producing shifted light (SL); a retroreflector (7) optically coupled to the acousto-optic modulator (5) and configured to receive the shifted light (SL) and reflect at least part of it back to the acousto-optic modulator (5) which is further configured to transmit at least part of the reflected light towards the second fiber section; a third optical fiber section (2c) connected to the fiber beam splitter (3).

The coherent beam recombination system provides an output recombined beam and comprises: a laser source providing a source beam with linewidth; a beam broadener providing a broadened beam from the source beam; a splitter splitting the broadened beam into a plurality of secondary beams; a plurality of channels coupled to the splitter. Each channel receives a respective secondary beam and provides a respective intermediate beam. Each channel has an optical amplifier, a phase modulator, an optical delay line, and an opto-mechanical element. The CBC system further comprises an optical sensor that provides a detection signal indicative of an intensity of a received optical beam; a focusing optics that receives the intermediate beams, provides the output recombined beam from a first portion of each intermediate beam, and provides a sampled recombined beam to the optical sensor from a second portion of each intermediate beam. The CBC system further comprises a control unit coupled to the optical sensor and the plurality of channels. The control unit comprises a phase-locking module configured to: provide a plurality of phase control signals to the phase modulators; receive the detection signal from the optical sensor, indicative of an intensity of the sampled recombined beam; calculate a cost function from the detection signal, wherein the cost function is a function of the intensity of the sampled recombined beam; perform an optimization algorithm of the cost function, configured to maximise the intensity of the sample recombined beam; and provide a plurality of updated phase control signals, based on a result of the optimization algorithm.

A power receiver includes a beam homogenizer that takes portions of a power beam and spreads them to each cover a substantial fraction (or all) of a power converter surface. The beam homogenizer may lack reflective side walls, and may have an aspect ratio as low as 2-5. The normalized deviation of beam irradiance at the surface may be reduced by a factor of 2-5 or more.

A sub-nanosecond laser system is disclosed. The sub-nanosecond laser system may include: a pump laser source operable to generate a pump laser beam having a pump wavelength; a first pump beam splitter operable to receive the pump laser beam and split the pump laser beam into at least a first split pump laser beam and a second split pump laser beam; a passively Q-switched seed laser operable to receive the first split pump laser beam and generate a seed laser beam; and an amplifier assembly operable to receive the second split pump laser beam and the seed laser beam. The amplifier assembly may include one or more amplifiers arranged in series in a multi-stage configuration, arranged in a multi-pass configuration, or a combination thereof.

A quantum computing system, comprising: an optical source for generating a continuous-wave, cw, optical carrier signal at a carrier wavelength; a confinement chamber; and optical intensity modulation apparatus comprising; an optical modulator operative to modulate the continuous-wave, cw, optical carrier signal to generate at least one sideband on the optical carrier signal, a radio frequency, RF, signal generator, operative to provide an RF drive signal to the optical modulator; a first optical waveguide grating having a central reflection wavelength corresponding to one of said sideband(s); and optical routing apparatus configured to direct the optical carrier signal and the at least one sideband to the first optical waveguide grating; and to direct a reflected optical signal from the first optical waveguide grating towards an output to form an output optical signal to be delivered to the confinement chamber.

An air ionization display device (100), comprising a pulsed light source module (1) and an optical field regulation module (2). The pulsed light source module (1) is configured to generate a plurality of synchronized pulsed light beams; the plurality of pulsed light beams are projected onto the optical field regulation module (2); the optical field regulation module (2) adjusts and converges the plurality of pulsed light beams and ionizes air to form a holographic real image in a display area (200).

A fiber laser device (1) includes: a first pumping light source (12) that emits first pumping light; a first amplification optical fiber (11) to which an active element is added, and which absorbs the first pumping light and amplifies and emits light having a first wavelength; a second amplification optical fiber (21) to which an active element that is the same as the active element added to the first amplification optical fiber (11) is added, and which absorbs the light having the first wavelength and amplifies and emits light having a second wavelength; combiners (31) and (32); and a light reduction unit (60) that is provided on each of the optical paths between the combiners (31) and (32) and the first amplification optical fiber (11), transmits light from the first amplification optical fiber (11), and suppresses transmission of light from the combiners (31) and (32).