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Laser patent

Laura HorcajadaLaura Horcajada

Method and device for operating a laser system with wavelength selection

The method and device for regulating the emission of a laser system provides the capability to determine the most suitable wavelength for the respective application using a wavelength-selecting element 4 arranged inside the laser transmitter 1; the returning part 6 of this emitted beam 5 in this case passes to the laser receiver 8 of the system and is used for setting the wavelength-selecting element.

Publication number: EP0065153A3 | Search similar patents

Seeding of a gas laser with incoherent light for frequency stabilisation

A laser arrangement exhibits a laser rod or a laser tube (3) as well as a high-voltage connection (19) for generating the laser beam. This laser arrangement has, in addition to the high-voltage connection, at least one electromagnetic radiation source (25) in the region of the laser rod or laser tube, which is provided for initiating the laser. The laser exhibits the special function that it can be initiated by means of additional radiation source. Essential features are: initiation by action of external electromagnetic radiation source, for example light, x-rays, microwaves or other electromagnetic waves. What is more, the laser exhibits the special feature that in the case of a so-called mixed-light, white-light or mixed-frequency laser or maser, what is emitted in the emission of the laser or also maser is not the full spectrum but only the radiation excited by the additional radiation source. Thus it is now possible, without external mechanisms or special optics, to emit and to change only a quite definite wavelength.

Publication number: EP1850427A1 | Search similar patents

Laser machining system and laser machining method


This laser machining system has a laser oscillator (2), a laser machining head (3), and a reflection unit (4). The laser oscillator (2) outputs a laser light (1). The laser machining head (3) concentrates the laser light (1) using a first optical member, and emits said light. The reflection unit (4) has a reflection member, which reflects the laser light (1) emitted from the laser machining head (3), and irradiates a work piece (8) with the laser light (1) reflected by the reflection member.

Publication number: WO2016013171A1 | Search similar patents

Laser source, particularly for industrial processes


A laser source comprising a laser beam generating unit (2), including one or more diode laser sources (20), for generating a first laser beam and an optical amplification unit (6), including at least one amplificator module (60) adapted to be pumped with laser light derived from said first laser beam emitted by said generating unit (2) and to emit a second laser beam at its output having a higher beam quality and a lower power value with respect to said first laser beam coming from said generating unit (2). Between said generating unit (2) and said optical amplification unit (6) there is interposed a laser beam shifting and addressing optical unit (4) which includes an optical path selector device (43), adapted to direct said first laser beam coming from said generating unit (2) selectively towards a first optical line (44), for emission of a laser beam having a relatively higher power value and a relatively lower quality at a first outlet (U1) of said laser source (1) or towards a second optical line (45), for generating the emission of the laser beam having a relatively lower power value and a relatively higher quality at a second outlet (U2) of said laser source (1).

Publication number: EP3001517A1 | Search similar patents

Diffraction free arrangement

Arrangements are disclosed for generating a well defined traveling wave beam substantially unaffected by diffractive spreading. In different embodiments, the beam can be an electromagnetic wave, particle beam, a transverse beam, a longitudinal beam such as an acoustic beam, or any type of beam to which the Helmholtz generalized wave equation is applicable. Pursuant to the teachings herein, a beam is generated having a transverse dependence of a Bessel function, and a longitudinal dependence which is entirely in phaser form, which results in a beam having a substantial depth of field which is substantially unaffected by diffractive spreading. In first and second disclosed embodiments respectively, optical and acoustical beams are generated by placing a circular annular source of the beam in the focal plane of a focussing means, which results in the generation of a well defined beam thereby because the far field intensity pattern of an object is the Fourier transform thereof, and the Fourier transform of a Bessel function is a circular function. In a third disclosed embodiment, a microwave beam is generated by transmitting a coherent microwave beam sequentially through a phase modulator, having a periodic stop function pattern, and a spatial filter, whose transmittance is the modulus of the Bessel function, to generate a microwave beam having a transverse Bessel function profile.More specifically, several embodiments are disclosed of an integrated optical laser cavity and an integrated microwave maser cavity for increasing the efficiency of production of the laser or maser beam. The integrated laser and maser cavities are designed to generate directly from their own gain medium a Bessel-mode diffraction-free beam.This patent application is a continuation-in-part application of Ser. No. 915,187, filed Oct. 3, 1986 for DIFFRACTION FREE ARRANGEMENT, which is hereby expressly incorporated by reference herein.

Publication number: EP0334858A4 | Search similar patents

Atomic frequency standard based on coherent state preparation

An atomic frequency standard based on coherent microwave emission from an ensemble of hydrogen or alkali metal atoms at their ground state hyperfine frequency. Hydrogen or alkali metal atoms are prepared in a coherent state by means of a radiation field resonant with the atoms at their hyperfine frequency prior to their entering into the emission region. The coherent microwave radiation emission results from the phenomenon of stimulated emission of radiation in a storage bulb placed in a cavity tuned to the hyperfine frequency. Because the atoms enter the cavity already prepared in a coherent state, radiation is emitted without threshold regarding the atomic flux or the cavity quality factor. The atoms emit their energy at their natural frequency perturbed only slightly by secondary effects such as spin exchange collisions, wall collisions and second order cavity pulling.

Publication number: US6255647B1 | Search similar patents

Laser electric power generator

A laser electric power generator includes a powerful dye laser with pumping system coupled with an aluminium chamber (4) connected with fibre optic rods (6) to a vacuum glass assembly (7) wherein cone shaped fiber optic internal reflectors (9) emit photons on a photo diodes and the photo diodes produce electrical energy.

Publication number: WO2006059341A1 | Search similar patents

Optical maser

1. An optical maser comprisingA. an optical cavity formed from a wafer of gallium arsenide having first and second contiguous p and n type regions with resistivities in the range 10.sup.-3 to 10.sup.-1 ohm-centimeter, said p region being centrally located and having an area less than the area of said n region, the surfaces of said n region remote from and opposite said p region being parallel to said p region and optically flat,B. a first metallic layer secured directly to the n region of said wafer on the surface remote from said p region, said first metallic layer being in ohmic contact with said n region and surrounding the optically flat portion of said n region,C. a second metallic layer secured directly to the p region of said wafer and being in ohmic contact therewith,D. first and second electrodes attached to said first and second metallic layers respectively, andE. means for producing a current through said optical cavity having a direction of flow from the p to the n region and having a magnitude sufficient to produce stimulated emission, coherent radiation being emitted from the optically flat portion of the n region of said gallium arsenide wafer in a direction perpendicular to the boundary between said contiguous p and n regions.

Publication number: US4083017A | Search similar patents

Organic laser system and method for modifying the emission wavelength of the laser system

The invention relates to a laser system (8) in which each amplification element (20) is a solid medium comprising at least a first layer (24) having a thickness (e1) lower than 100 ?m, wherein the molecules suitable for emitting light radiation of each amplification element (20) form an organic gain medium (22) contained in the first layer (24) of the amplification element (20).

Publication number: WO2013189811A1 | Search similar patents

Niobate maser materials and devices made therefrom

Publication number: USB275677I5 | Search similar patents

Holographic technique for extreme microcircuitry size reduction

A method of producing collimated x-radiation by suitably subjecting metallic ions in the presence of lower Z ions to a pulse of laser energy from a conventional laser. An improvement on said conventional laser in order to increase the reliability of production of said collimated x-radiation. An alternative improvement on said conventional laser for similar improvement of said collimated x-radiation. An example of the application of the use of said collimated x-radiation to the art of producing micro-circuitry.RELATED APPLICATIONSThis is a continuation-in-part of Ser. No. 08/175,102, filed Dec. 29, 1993, by the same inventor. This application and the parent application are unassigned. The parent application is now U.S. Pat. No. 5,404,364, issued on Apr. 4, 1995.

Publication number: EP0766880A1 | Search similar patents

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