21 results about "Sum-frequency generation" patented technology

The present invention relates to the technical field of lasers, and particularly relates to an all-solid-state continuous-wave vacuum ultraviolet laser using a double resonant cavity. A first cavity mirror M1, a first laser crystal C1, a fourth cavity mirror M4, a fifth cavity mirror M5, and a sixth cavity mirror M6 form a first laser resonant cavity; a second cavity mirror M2, a second laser crystal C2, a third cavity mirror M3, the fourth cavity mirror M4, the fifth cavity mirror M5, and the sixth cavity mirror M6 form a second laser resonant cavity; a first nonlinear optical crystal O1 is disposed between the fifth cavity mirror M5 and the sixth cavity mirror M6 to frequency-double the 526-nm laser generated by the first resonant cavity into a 263-nm frequency-doubled laser; a second nonlinear optical crystal O2 is disposed between the fourth cavity mirror M4 and the fifth cavity mirror M5 to sum-frequency the 725-nm fundamental-frequency laser generated by the second resonant cavity and the 263-nm frequency-doubled laser generated by the first nonlinear optical crystal O1 to generate a 193-nm vacuum ultraviolet laser, which is output through the fourth cavity mirror M4. The present invention has a simple internal structure and requires fewer frequency conversion times.

A laser assembly and a method for generating continuous-wave (CW) light at approximately 193 nm (between 180 nm and 200 nm) and at a power of 1W or higher using two CW laser sources: one laser source generating first fundamental light that is twice frequency doubled or otherwise converted into first CW light having a first deep-ultraviolet (DUV) wavelength between 250 nm and 275 nm, the other laser source generating second CW light having an infrared (IR) wavelength between 1300 nm and 1700 nm. A resonant cavity receives the second CW light and generates enhanced CW light at 100 W or higher. A first non-linear optical (NLO) crystal mixes a first enhanced CW light portion and the first CW light to generate sum-frequency generation (SFG) light having a second DUV wavelength. A second NLO crystal mixes a second enhanced CW light portion and the SFG light to generate output CW light at approximately 193 nm.

The invention belongs to the field of all-solid-state ultrafast laser, and discloses a GHz repetition frequency high-power femtosecond green light and ultraviolet laser generation device and method, and the method comprises the steps: a pumping source outputs fundamental frequency femtosecond laser with the repetition frequency greater than 1GHz; generating femtosecond green light from the fundamental frequency femtosecond laser through a frequency doubling effect; splitting the residual femtosecond laser and the frequency doubling femtosecond green light in the emergent light of the first frequency doubling crystal to obtain a residual femtosecond laser light path and a femtosecond green light path which are parallel to each other; adjusting the time delay of the transmission process of the residual fundamental frequency femtosecond laser to enable the time delay to coincide with the femtosecond green light time in the femtosecond green light path; combining the emergent light of the remaining femtosecond laser light path and the emergent light of the femtosecond green light path; and performing sum frequency on the residual fundamental frequency femtosecond laser and the femtosecond green light after beam combination to generate ultraviolet femtosecond laser. According to the invention, femtosecond green light output with GHz repetition frequency and high output power and ultraviolet femtosecond laser output with GHz repetition frequency and high output power are realized at the same time.

This invention relates to a laser generating device with a wavelength of 215-222 nm, comprising: an excitation light source unit that converts laser light with a wavelength of 1030-1064 nm into a second harmonic to generate laser light with a wavelength of 515-532 nm; an optical parametric oscillation unit that uses the laser light with a wavelength of 515-532 nm as excitation light to generate signal light with a wavelength of 858-887 nm and idle light with a wavelength of 1288-1330 nm; a separation unit that separates the signal light and the idle light; a first wavelength conversion unit that generates a fourth harmonic from the signal light; a second wavelength conversion unit that generates deep ultraviolet light with a wavelength of 215-222 nm from the idle light by light summing with the second harmonic of the excitation light; and a coupling unit that couples the fourth harmonic from the first wavelength conversion unit with the deep ultraviolet light from the second wavelength conversion unit. This invention provides a laser generating device capable of efficiently and simply generating pulsed laser light with a wavelength of 215-222 nm, including a wavelength of 222 nm that inactivates microorganisms.

A laser apparatus for generating a sub- 190 nanometer laser beam includes a deep-ultraviolet solid-state laser source to generate an initial deep-ultraviolet laser beam, at least one mid-infrared solid-state laser source to generate at least one respective mid-infrared laser beam, and at least one lithium triborate crystal to generate an output deep-ultraviolet laser beam from the initial deep-ultraviolet and mid-infrared laser beams via sum-frequency generation. Each mid-infrared solid- state laser source includes (a) a holmium-, thulium-, or chromium-doped gain crystal or gain fiber or (b) an optically-pumped semiconductor gain material to generate the respective mid-infrared laser beam. The laser apparatus may be configured for continuous-wave and pulsed operation, thus offering versatile solutions for applications requiring DUV laser radiation below 190 nanometers. Advantageously, the present approach relies on lithium triborate. Lithium triborate crystals can be grown with the quality and dimensions needed for industrial applications.

The embodiment of the invention provides a frequency conversion device based on a lithium niobate ridge waveguide on an insulator and a preparation method, and belongs to the field of integrated optical, nonlinear optical and optoelectronic devices. The device comprises a silicon substrate layer, a silicon dioxide buffer layer, an x-cut lithium niobate film layer and a silicon dioxide cladding from bottom to top, a ridge waveguide with width periodically changing is arranged on the x-cut lithium niobate layer, and light in the waveguide is propagated in the y-axis direction. The waveguide with the width periodically changing is prepared on the lithium niobate film, quasi-phase matching is achieved, and therefore the second harmonic conversion efficiency is greatly improved. By changing the period of the waveguide, second-order nonlinear phase matching conditions under different wavelengths, such as phase matching conditions of second harmonic generation, sum frequency generation and difference frequency generation, can be met. Correspondingly, according to the preparation method, the waveguide structure with the periodically changed width can be formed through a single etching process, and a complex ferroelectric domain inversion step is not needed. The preparation method has the advantages of simple process, controllable morphology and flexible design.

A wavelength-variable light source (1) comprises: an oscillation unit (2) that oscillates light; first light output units (4, 5, 6) that variably change the wavelength of the light oscillated by the oscillation unit and output first light having a wavelength in a first wavelength band; a second light optical path (21) that propagates second light having a wavelength different from the first light; and a sum frequency light generation unit (8) that includes a nonlinear optical crystal and combines the first light (L1) output by the first light output units and the second light (L2) propagated in the second light optical path on the same optical axis, causes the combined light to enter the nonlinear optical crystal, and emits sum frequency light (L3) having a wavelength in a second wavelength band shorter than the first wavelength band from the nonlinear optical crystal by sum frequency generation.

The invention discloses an all-solid-state deep ultraviolet light source, and relates to the technical field of solid laser, and the deep ultraviolet light source comprises a fundamental frequency optical module, a frequency tripling module, a frequency doubling module, a titanium sapphire laser module and a sum frequency module. The fundamental frequency optical module generates two pieces of 1064.4 nm near-infrared laser with the same repetition frequency; the third harmonic generation module is used for performing third harmonic generation on the first 1064.4 nm near-infrared laser to generate 354.8 nm ultraviolet light; the frequency doubling module carries out frequency doubling on the second 1064.4 nm near-infrared laser to generate 532.2 nm green light; the titanium sapphire laser module adopts a frequency doubling module to output green light pumping, and generates 823.9 nm near-infrared laser; the sum frequency module carries out sum frequency on 354.8 nm ultraviolet light and 823.9 nm near infrared light which are generated by the frequency tripling module and the titanium sapphire laser module to generate 248.3 nm deep ultraviolet light, and the production cost of the 248.3 nm deep ultraviolet light source can be effectively reduced.

The present invention relates to a 399.08-nm wavelength ultraviolet laser light generating device, comprising: an excitation light source part for converting a 1064.2-nm laser light to a second harmonic, and generating a 532.1-nm laser light; an optical parametric oscillating part for generating a 798.15-nm signal light and a 1596.3-nm idler light using the 532.1-nm laser light; a first wavelength converting part for generating a 399.08-nm light by sum frequency generation of the 1596.3 nm idler light and a 532.1-nm light; and a second wavelength converting part for generating a 399.08-nm light of a second harmonic from the 798.15-nm signal light. The order of the first wavelength converting part and the second wavelength converting part is random. The present invention relates to a 228.04-nm wavelength ultraviolet laser light generating device comprising the 399.08-nm wavelength laser light generating device and a third wavelength converting part for subjecting a 399.08-nm light and a 532.1-nm light to sum frequency generation, and generating a 228.04-nm light. The present invention provides a simple device of generating a 228.04-nm laser light which is a deep ultraviolet ray in high efficiency and a simple 399.08-nm ultraviolet laser light generating device usable as a light source thereof.

The invention belongs to the technical field of lasers, and provides a 486nm laser based on Raman laser frequency tripling and application, the 486nm laser is used for outputting 486.1 nm target blue light, and the 486nm laser comprises a fundamental frequency light source, a frequency tripling module and a dichroscope; the base frequency light source outputs base frequency light of 1458.3 nm, frequency doubling is carried out on the base frequency light of 1458.3 nm with a part of power in the frequency doubling crystal to generate frequency doubling light of 729.15 nm, and sum frequency is carried out on the base frequency light of 1458.3 nm with the other part of power and the frequency doubling light of 729.15 nm in the sum frequency crystal to generate target blue light of 486.1 nm; and 486.1 nm target blue light is separated and output by using a dichroscope. The blue light source with high power, high light beam quality, high stability and narrow linewidth can be realized, and a high-performance light source is provided for underwater application scenes such as underwater detection, communication, photoelectric countermeasure and diving exploration.

A system for frequency conversion is disclosed. The system includes a nonlinear crystal waveguide formed from strontium tetraborate (SBO) or lithium triborate (LBO). This system is used for second harmonic generation or sum-frequency generation to produce laser output light having wavelengths in the range of about 120-200 nm. Inspection systems, lithography systems and cutting systems incorporating the frequency conversion system are also described.

An apparatus that displays synthetic scene images for augmented reality, virtual reality and other display types. One or more pairs of input beams (70, 76) are injected into a display panel incorporating a layer (100) of phase matched nonlinear optical (NLO) material. The input beams of each pair are brought to cross each other in the NLO material in a noncollinear geometry to generate a product beam (84) by sum frequency generation that is directed to the eye (160) of a viewer. The synthetic scene image information is impressed on each input beam pair by amplitude and phase modulation to set the amplitude (i.e. brightness), wavevector (i.e. direction) and wavefront radius of curvature (i.e. depth) of the synthetic scene image. For colour display, three pairs of input beams with respective sum frequencies in three primary colours are used.

To provide a quantum entangled photon pair generation device that facilitates use of various quantum memories and an excitation laser.SOLUTION: A quantum entangled photon pair generation device (1) comprises: a first laser beam source (21) that emits a laser beam with a first wavelength (λ1); a second laser beam source (22) that emits a laser beam with a second wavelength (λ2); a wavelength conversion element (23) that generates wavelength conversion light from the laser beams emitted from the first and second laser beam sources through sum frequency generation; a nonlinear optical element (31) that generates a quantum entangled photon pair from the wavelength conversion light; and a resonator (32) that causes the quantum entangled photon pair to make a circuit, and emits the quantum entangled photon pair making a circuit.SELECTED DRAWING: Figure 2

The utility model relates to the technical field of lasers, in particular to an intracavity cascade frequency conversion all-solid-state continuous wave vacuum ultraviolet laser, which is characterized in that a first cavity mirror M1, a first laser crystal C1, a fourth cavity mirror M4, a fifth cavity mirror M5 and a sixth cavity mirror M6 form a first laser resonant cavity; the second cavity mirror M2, the second laser crystal C2, the third cavity mirror M3, the fourth cavity mirror M4 and the seventh cavity mirror M7 form a second laser resonant cavity; the first nonlinear optical crystal O1 is arranged between the fifth cavity mirror M5 and the sixth cavity mirror M6, and is used for performing frequency doubling on the 526-nm laser generated by the first resonant cavity into 263-nm frequency-doubled laser; the second nonlinear optical crystal O2 is arranged between the fourth cavity mirror M4 and the fifth cavity mirror M5, frequency sum is carried out on 725nm fundamental frequency laser generated by the second resonant cavity and 263nm frequency doubling laser generated by the first nonlinear optical crystal O1, and 193nm vacuum ultraviolet laser is generated and output through the fourth cavity mirror M4. The utility model has the advantages of simple internal structure, few frequency conversion times, stable output and long service life.

A laser assembly and a method for generating continuous-wave (CW) light at approximately 193 nm (between 180 nm and 200 nm) and at a power of 1 W or higher using two CW laser sources: one laser source generating first fundamental light that is twice frequency doubled or otherwise converted into first CW light having a first deep-ultraviolet (DUV) wavelength between 250 nm and 275 nm, the other laser source generating second CW light having an infrared (IR) wavelength between 1300 nm and 1700 nm. A resonant cavity receives the second CW light and generates enhanced CW light at 100 W or higher. A first non-linear optical (NLO) crystal mixes a first enhanced CW light portion and the first CW light to generate sum-frequency generation (SFG) light having a second DUV wavelength. A second NLO crystal mixes a second enhanced CW light portion and the SFG light to generate output CW light at approximately 193 nm.

An apparatus that displays synthetic scene images for augmented reality, virtual reality and other display types. One or more pairs of input beams (70, 76) are injected into a display panel incorporating a layer (100) of phase matched nonlinear optical (NLO) material. The input beams of each pair are brought to cross each other in the NLO material in a noncollinear geometry to generate a product beam (84) by sum frequency generation that is directed to the eye (160) of a viewer. The synthetic scene image information is impressed on each input beam pair by amplitude and phase modulation to set the amplitude (i.e. brightness), wavevector (i.e. direction) and wavefront radius of curvature (i.e. depth) of the synthetic scene image. For colour display, three pairs of input beams with respective sum frequencies in three primary colours are used.

Aspects of the present disclosure generally relate to two-dimensional electronic apparatuses and methods of use. A two-dimensional electronic sum frequency generation (2D-ESFG) apparatus includes an amplifier including a laser source. A broadband optical parametric amplifier (BOPA) is optically coupled to the amplifier. The BOPA includes a two-stage amplifier. An etalon is optically coupled to the amplifier. The etalon includes two or more partially reflective substrate optical flats. A noncollinear optical parametric amplifier (NOPA) is optically coupled to the amplifier. A dispersive filter pulse shaper is optically coupled to the NOPA. A synchronizer including a galvanometer mirror is optically coupled to the BOPA, the etalon, and the dispersive filter pulse shaper. A detector is optically coupled to the synchronizer.

Aspects of the present disclosure generally relate to two-dimensional electronic apparatuses and methods of use. A two-dimensional electronic sum frequency generation (2D-ESFG) apparatus includes an amplifier including a laser source. A broadband optical parametric amplifier (BOPA) is optically coupled to the amplifier. The BOPA includes a two-stage amplifier. An etalon is optically coupled to the amplifier. The etalon includes two or more partially reflective substrate optical flats. A noncollinear optical parametric amplifier (NOPA) is optically coupled to the amplifier. A dispersive filter pulse shaper is optically coupled to the NOPA. A synchronizer including a galvanometer mirror is optically coupled to the BOPA, the etalon, and the dispersive filter pulse shaper. A detector is optically coupled to the synchronizer.

A system for frequency conversion is disclosed. The system includes a nonlinear crystal waveguide formed from strontium tetraborate (SBO) or lithium triborate (LBO). This system is used for second harmonic generation or sum-frequency generation to produce laser output light having wavelengths in the range of about 120-200 nm. Inspection systems, lithography systems and cutting systems incorporating the frequency conversion system are also described.

A multiple frequency laser system and method for treating skin conditions via a handpiece features a pump laser module having a single laser beam at a first frequency. A dual laser module receives the laser beam at the first frequency and includes dual free running laser resonators to produce a laser beam at a second frequency and a laser beam at a third frequency. A frequency conversion module receives as inputs the laser beam at the second frequency and the laser beam at the third frequency and is configured to selectively provide laser beams to the handpiece including a second harmonic generation of the second frequency, a second harmonic generation of the third frequency, a summed frequency generation of the second frequency and the third frequency, the laser beam at the first frequency, the laser beam at the second frequency, and / or the laser beam at the first frequency combined with the laser beam at the second frequency. The handpiece receives the laser beams from the frequency module and delivers them to skin for treatment.

An optical tensor core includes a device platform, a broadband, phase-locked, optical frequency comb generator, an array of electro-optic (EO) modulators, wherein a vector, {Xj} and a matrix, {Aij} are encoded onto optical comb mode fields, and a non-linear waveguide, wherein a sum frequency generation (SFG) operation occurs directly on the optical comb mode fields so as to realize a multiply-accumulate (MAC) operation between the vector {Xj} and the matrix {Aij}. An integrated system and related methodologies and applications are disclosed.