Patent application number | Description | Published |
20080210886 | Laser processing method and laser processing apparatus - The present invention relates to a laser processing method and the like having a structure for making it possible to process an object to be processed in various ways while accurately adjusting the installation state of the object. The method irradiates the object with plural adjustment laser light beams that are set in a specific positional relationship against a converging point of processing laser light beam, and adjusts the state of installation of the object while monitoring irradiation areas of the adjustment laser light beams on the surface of the object. Each irradiation directions of adjustment laser light beams is different from that of the processing laser light beam. By reflecting the irradiation condition of the adjustment laser light beam and monitored information of the irradiation areas in positional adjustment of the object, the installation state of the object can be adjusted in accordance with various kinds of processing. | 09-04-2008 |
20080239471 | Optical module and processing method - The present invention relates to an optical module which is capable of amplifying light to be amplified to high power and which has a structure for effectively reducing influences of damage to other optical parts, and heat generation. The optical module includes a fiber unit constituted by an optical coupler, an amplification optical fiber, and an absorption optical fiber. Each of the amplification optical fiber and the absorption optical fiber has a core, a first cladding, a second cladding, and a third cladding. Further, each of the fibers allows the light to be amplified to propagate in a single mode in each of the cores, and allows pumping light to propagate in a multimode in the core, the first cladding, and the second cladding. The core of the amplification optical fiber is doped with an amplification dopant for amplifying the light to be amplified. The second cladding of the absorption optical fiber is doped with an absorption dopant for absorbing the pumping light. | 10-02-2008 |
20080304137 | Light source apparatus - The invention relates to a light source apparatus having a structure for effectively suppressing a negative effect due to a nonlinear effect generated in propagation of an amplifying light, and realizing a stable operation. In the light source apparatus, light amplified in an optical amplifier fiber is emitted to the outside of the apparatus through an optical output fiber whose one end is connected to an output connecter. At this time, a part of Raman scattered light, generated in the optical output fiber, propagates toward an pumping light source through the optical amplifier fiber from the optical output fiber. An optical component having an insertion loss spectrum that attenuates the Raman scattered light but allows pumping light or light to be amplified to transmit therethrough, is provided on a propagation path of the Raman scattered light, due to the light component, the intensity of the Roman scattered light reaching the pumping light source is effectively reduced. As a result, a negative effect due to a nonlinear effect generated in propagation of light to be amplified can be effectively suppressed, and the light source apparatus can be stably operated. | 12-11-2008 |
20090091839 | LIGHT SOURCE APPARATUS AND OPTICAL MODULE INCLUDED THEREIN - The present invention relates to a light source apparatus or the like provided with a structure that can block reflected return light also when an emitting end side of an optical isolator is a space. The light source apparatus comprises a light source section, a guide section, and an optical module. The optical module includes a collimator, an optical isolator, and an oblique-beam blocking section. The collimator outputs collimated light with a predetermined beam diameter as a forward propagating beam. The optical isolator is a polarization-independent optical isolator that introduces the collimated light from a first end and outputs this collimated light from a second end. The oblique-beam blocking section includes first and second optical components each having a window of a diameter D, and blocks light incident at a predetermined angle relative to an optical axis of the forward propagating beam out of a backward propagating beam, by separating the first and second optical components from each other by a predetermined distance. | 04-09-2009 |
20090108173 | LASER PROCESSING APPARATUS AND LASER PROCESSING METHOD - The present invention relates to a laser processing apparatus and the like having a structure for implementing at the same time both an efficient laser processing in the place where a laser beam is difficult to reach and a laser processing without damages in the place where the laser beam is easy to reach. This laser processing apparatus comprises a laser light source, an irradiation optical system applying a laser beam to an object while scanning the laser beam, a photo-detector detecting the laser beam applied from the irradiation optical system, and a control section of making switching between a continuous oscillation and a pulse oscillation of the laser beam at the laser light source. In particular, the control section makes a continuous oscillation of the laser beam with respect to the laser light source in the case in which the laser beam applied from the irradiation optical system is detected at the photo-detector; while it makes a pulse oscillation of the laser beam with respect to the laser light source in the case in which no laser beam applied from the irradiation optical system is detected at the photo-detector. | 04-30-2009 |
20090201574 | OPTICAL AMPLIFICATION MODULE AND LASER LIGHT SOURCE DESIGNED TO SUPPRESS PHOTODARKENING - The present invention relates to an optical amplification module having a construction which effectively suppresses photodarkening, and to a laser light source including the same. The laser light source comprises a light source for outputting light to be amplified, and an optical amplification module. The optical amplification module comprises two types of optical amplification media having different rare earth element concentrations, and a pumping light source. The low concentration medium and the high concentration medium are disposed in the propagation direction of pumping light such that the population inversion of the low concentration medium is higher than that of the high concentration medium. Hence, by arranging two types of optical amplification media with different rare earth concentrations such that the population inversion of the low concentration medium is higher than that of the high concentration medium, sufficient overall gain of the laser light source can be obtained while effectively suppressing photodarkening in the two types of optical amplification media. | 08-13-2009 |
20090242523 | LASER PROCESSING METHOD - The present invention relates to a laser processing method that makes it possible to effectively suppress the generation of surface irregularities on the surface of a plastic member where a metal member and a plastic member are joined together. In the laser processing method, a plurality of laser beams are irradiated from different directions so as to focus on the vicinity of an interface between the metal member and the plastic member, which are in contact with one another. The power densities of the respective laser beams at this time are set to a level not more than a level, at which the exposed surface of the plastic member on the side opposite to the interface between the metal member and the plastic member, does not melt. As a result of this, air bubbles or the like are not generated in the vicinity of the exposed surface of the plastic member, and the generation of surface roughness on the exposed surface of the plastic member is effectively suppressed. | 10-01-2009 |
20090272877 | METHOD AND APPARATUS OF MEASURING BACKWARD LIGHT, AND LASER PROCESSING METHOD - The present invention relates to a method of measuring backward light, which is constructed for checking, prior to laser processing, backward light that propagates backward through an isolator included in a laser processing apparatus. The present invention also relates to a laser processing method and the like. A laser processing apparatus has an optical head provided with a laser light source part, light guide, and isolator. The optical head has an emitting optical system, irradiation optical system, and light collecting optical system. The method of measuring backward light uses a photodetector to detect, from reference light introduced from a measurement light source into the optical head, the power of an optical component that has passed through the isolator, while changing the position of the measurement light source. The laser processing method performs laser processing by using the laser processing apparatus that has the optical head in which the arrangement of optical components is adjusted beforehand on the basis of the result of detection or result of measurement. | 11-05-2009 |
20090277885 | LASER PROCESSING APPARATUS AND LASER PROCESSING METHOD - The present invention relates to a laser processing apparatus having a structure for effectively processing of objects by condensing a laser beam, and a laser processing method. A laser processing apparatus comprises a common mount surface on which plural objects are disposed in an array, a light source, a lens the reflection direction of which is changeable, and a condensing direction modifier. A laser beam from the light source arrives at the lens through a galvano-mirror. Herein, the galvano-mirror is arranged such that the reflection position thereof agrees with the front focal position of the lens. As the galvano-mirror reflects a laser beam toward the lens while the reflection direction is changed, the arriving position of the laser beam is scanned on the entrance surface of the lens. The condensing direction modifier modifies, according to the irradiation position of the laser beam arrived from the lens, an exit direction of the laser beam. | 11-12-2009 |
20100033548 | LASER MARKING METHOD - The present invention relates to a laser marking method which is capable of changing the grey level of a marking even in the case of a high processing speed. The laser marking method forms a marking pattern on a marking object by irradiating the marking object with pulsed light oscillated from a pulsed light source of a MOPA structure in which a semiconductor laser outputting directly-modulated pulsed light is used as a seed light source. At this time, the pulse duration of the pulsed light is changed in order to change a gray level of the marking pattern to be formed. In this way, a peak power of the pulsed light is changed by changing the pulse duration, so that it is possible to positively change the gray level of the marking pattern without changing the processing speed. | 02-11-2010 |
20100142565 | LASER LIGHT SOURCE - The present invention relates to a laser light source having a structure that has high durability to support high power output. The laser light source is an optical device that pulse-oscillates laser light and has a resonator, a rare earth element doped fiber, pumping means, Q switch means, and a condensing lens. The resonator forms a resonance optical path. A fiber is inserted on the resonance optical path and outputs radiation light by supply of pumping energy. The pumping means continuously supplies pumping energy to the fiber. The Q switch means modulates resonator loss of the resonator. The condensing lens condenses the radiation light whose spot size has been expanded and which propagates from the fiber to the Q switch means. The Q switch means is disposed such that a portion contributing to at least a resonator loss modulation is located at the condensing point of radiation light which is condensed by the condensing lens, and mechanically changes formation and interruption of the resonance optical path by transmitting or interrupting the radiation light in the contributing portion. | 06-10-2010 |
20100188735 | OPTICAL MODULE - The present invention relates to an optical module having a structure for reducing adverse contingencies such as increased number of fusion splicing points, drops in output, and higher costs associated with a greater number of optical components. The optical module comprises an amplification optical fiber, a transmission optical fiber, and a fusion splicing structure that fusion-splices the amplification optical fiber to the transmission optical fiber, in a state where a cover layer is removed at the tip portions, including the end faces, of these optical fibers. The fusion splicing structure includes a pumping light removing resin that covers directly the tip portions of the amplification optical fiber and the transmission optical fiber from which the cover layer is removed. The pumping light removing resin has a higher refractive index than a first cladding of the amplification optical fiber. The above configuration allows transmitted pumping light, for which the confinement effect by the first cladding of the amplification optical fiber is cancelled, to escape more efficiently out of the fusion splicing portion. | 07-29-2010 |
20100189139 | PULSE MODULATION METHOD AND OPTICAL FIBER LASER - The present invention relates to a pulse modulation method and the like having a structure for effectively suppressing nonlinear optical phenomena which increase as an optical pulse becomes wider when amplifying the optical pulse with a predetermined period as seed light. A modulator performs pulse modulation for a laser light source which is a seed light source or light outputted from the laser light source. A modulation pattern of a modulated voltage outputted from the modulator is adjusted such as to include a plurality of pulse components each having a signal width shorter than the pulse width of the optical pulse as an optical pulse generation pattern within a modulation period corresponding to a period of the optical pulse. | 07-29-2010 |
20100202478 | Laser Light Source - The present invention relates to a laser light source having a structure for narrowing a wavelength bandwidth of output light. The laser light source comprises, at least, a laser resonator, a pumping light source, an optical path switch device, a diffraction grating, and a total reflection mirror. The laser resonator has a light amplifying fiber for output of emission light arranged on a resonance optical path thereof. The optical path switch device has a first port and a second port on the resonance optical path of the laser resonator. The diffraction grating spectrally separates the emission light outputted from the second port. The total reflection mirror reflects a specific wavelength component out of wavelength components spectrally separated by the diffraction grating, so as to feed the specific wavelength component back to the second port. Particularly, the optical path switch device controls a light transmittable state of the emission light outputted from the light amplifying fiber, at the second port. | 08-12-2010 |
20100260216 | PULSE GENERATION METHOD AND LASER LIGHT SOURCE APPARATUS - The present invention enables simultaneous setting or automatic setting of a pulse peak and a pulse width of a light pulse. In a configuration comprising a light emitting element outputting laser light, a driving current supply section supplying a driving current to the light emitting element, a modulator applying a modulation voltage for pulse modulation of the laser light to the light emitting element, and a modulation control section controlling a modulation pattern as a pattern of pulse modulation of the modulation voltage for the modulator, the modulation control section sets a modulation voltage value in the modulation pattern based on information on a driving current value, and sends information on the modulation pattern to the modulator so that the modulation voltage reaches the set value. | 10-14-2010 |
20110148002 | LASER PROCESSING METHOD AND LASER PROCESSING DEVICE - The present invention relates to a laser processing method and the like which use no wavelength conversion technique by nonlinear optical crystals when selectively removing an insulating layer of a printed board, while employing only one wavelength throughout the entire removal processing. A laser processing apparatus ( | 06-23-2011 |
20110176203 | LASER APPARATUS - The present invention relates to a laser apparatus capable of supplying laser beams from each of plural beam emitting ends constituting laser beam output ports, and realizes the overall low power consumption and low non-linearization. The laser apparatus comprises a seed light source, beam emitting ends, an intermediate optical amplifier, an optical branching device, and final-stage optical amplifiers. The number of beam emitting ends is greater than the number of seed light sources, and the final-stage optical amplifiers and the beam emitting ends correspond to each other one-on-one. The optical branching device includes an input port associated to the seed light source and plural output ports associated to the respective beam emitting ends so as to constitute a part of the light paths between the seed light source and the beam emitting ends. The intermediate optical amplifier is disposed on the light path between the seed light source and the optical branching device, while the final-stage optical amplifiers are respectively disposed on the branch lines between the beam emitting ends and the optical branching device. | 07-21-2011 |
20110317726 | LASER APPARATUS - The present invention relates to a laser apparatus with a structure for realizing a fast response in carrying out a start and an end of output of pulsed laser light while effectively suppressing damage to an optical amplifying medium. The laser apparatus is provided with a seed light source, an optical amplification section, a pulse modulator, a pump power controller, and a main controller. The pulse modulator receives an output start instruction and an output end instruction fed from the main controller and controls a start and an end of output of seed light from the seed light source. The pump power controller receives a pump trigger signal fed from the main controller and increases or decreases a power of pump light supplied to the amplification section. The main controller decreases the power of the pump light supplied to the amplification section, on the occasion of ending the output of the pulsed laser light, and thereafter makes the pulse modulator end the output of the seed light from the seed light source. | 12-29-2011 |
20120006979 | LASER PROCESSING APPARATUS AND LASER PROCESSING METHOD - The present invention relates to a laser processing apparatus and the like having a structure for implementing at the same time both an efficient laser processing in the place where a laser beam is difficult to reach and a laser processing without damages in the place where the laser beam is easy to reach. This laser processing apparatus comprises a laser light source, an irradiation optical system applying a laser beam to an object while scanning the laser beam, a photo-detector detecting the laser beam applied from the irradiation optical system, and a control section of making switching between a continuous oscillation and a pulse oscillation of the laser beam at the laser light source. In particular, the control section makes a continuous oscillation of the laser beam with respect to the laser light source in the case in which the laser beam applied from the irradiation optical system is detected at the photo-detector; while it makes a pulse oscillation of the laser beam with respect to the laser light source in the case in which no laser beam applied from the irradiation optical system is detected at the photo-detector. | 01-12-2012 |
20120255935 | LASER PROCESSING METHOD - There is obtained a laser processing method by which an excellent shape of a cut surface can be achieved and an increase in cost can be suppressed. A laser processing method includes the steps of: preparing a material to be processed; and forming a modified area in the material to be processed, by irradiating the material to be processed with laser beam. In the aforementioned step, pulsed laser beam having a continuous spectrum is focused with a lens, thereby forming a focusing line constituted by a plurality of focuses that are obtained by predetermined bands forming the continuous spectrum of the laser beam, and the material to be processed is irradiated with the laser beam such that at least a part of the focusing line is located on a surface of the material to be processed, thereby forming the modified area on an axis of the focusing line. | 10-11-2012 |
20120300802 | LIGHT SOURCE CONTROL METHOD - The present invention relates to a light source control method capable of decreasing the dependence of a pulse width (FWHM) of an output pulsed light on a repetition frequency. A pulsed light source has an MOPA structure, and has a seed light source and an optical fiber amplifier. The seed light source includes a semiconductor laser which is directly modulated and outputs a pulsed light. By adjusting a temperature of the seed light source and a pumping light power of the optical fiber amplifier, a predetermined full width half maximum of a pulse at a predetermined repetition frequency is implemented for the pulsed light outputted from the optical fiber amplifier. | 11-29-2012 |
20120305805 | LASER APPARATUS - The present invention relates to a laser apparatus having a structure for facilitating the change of a transparent wavelength band of a bandpass filter in accordance with a central wavelength of pulsed light. In the laser apparatus, the transparent wavelength band of light to be transmitted through a BPF is changed according to the central wavelength of the pulsed light when the pulse width of the pulsed light outputted from a seed light source is changed. | 12-06-2012 |
20120305806 | LIGHT SOURCE APPARATUS AND PROCESSING METHOD - The present invention relates to a light source apparatus. The light source apparatus has an MOPA configuration and comprises a seed light source, a pulse generator, an intermediate optical amplifier, a final stage optical amplifier, a delivery optical fiber, and a light output terminal. The delivery optical fiber is a PBG fiber having a photonic bandgap (PBG) structure in a core-surrounding portion located around the core. Light with a wavelength in a high loss band of the PBG fiber is inputted into the PBG fiber. | 12-06-2012 |
20120307847 | LASER APPARATUS - The present invention relates to a laser apparatus having a structure for easily shortening a pulse. In the laser apparatus, as a result of a phase control unit adjusting a modulation period of an external modulator and an output period of pulsed light of a seed light source, it is possible to generate pulsed light which is outputted only during a period when the modulation period and the output period overlap each other. | 12-06-2012 |
20120307850 | PULSED LIGHT GENERATION METHOD - The present invention relates to a method of enabling generation of pulsed lights each having a narrow pulse width and high effective pulse energys. A pulse light source has a MOPA structure, and comprises a single semiconductor laser, a bandpass filter and an optical fiber amplifier. The single semiconductor laser outputs two or more pulsed lights separated by a predetermined interval, for each period given according to a predetermined repetition frequency. The bandpass filter attenuates one of the shorter wavelength side and the longer wavelength side, in the wavelength band of input pulsed lights. | 12-06-2012 |