Abstract: A gas laser system including: a laser oscillator; a power supply unit for supplying power to the laser oscillator; a power storage unit for storing the power supplied from the power supply unit; a power reduction detection unit for detecting a power reduction state where a value of the power supplied from the power supply unit falls below a power value enabling the laser oscillator to normally operate; and a control unit for controlling the gas supply and discharge unit by using the power stored in the power storage unit so as to seal the gas flow path, when the power reduction detection unit detects the power reduction state.

Abstract: A laser processing apparatus including a laser oscillator, a laser processing machine, and a control part controlling the laser oscillator and the laser processing machine. The control part includes a preparatory operation part controlling the laser processing machine so as to start a preparatory operation for the laser processing if a preparatory operation command is output and, a mode switching part switching an operating mode of the laser oscillator between a standard standby mode before carrying out the laser processing and an energy saving mode with less consumed power than the standard standby mode, and the mode switching part controls the discharge tube voltage so as to switch the operating mode to the energy saving mode before the preparatory operation command is output and to start a switching operation of the operating mode from the energy saving mode to the standard standby mode when the preparatory operation command is output.

Abstract: A laser oscillator enabling estimation of the lifetime of the pump light source by a simple configuration, provided with a pump light source, a power source supplying current to the pump light source, a laser crystal outputting laser light by the pump light emitted from the pump light source, a power sensor receiving laser light generated from the laser crystal and outputting a signal corresponding to the intensity of the laser light, a memory storing the operating time of the laser oscillator, and a processor judging if the signal output by the power sensor satisfies a predetermined condition and, if satisfying the predetermined condition, uses the value of the current supplied by the power source to the pump light source and the operating time stored in the memory to estimate the lifetime of the pump light source.

Abstract: A semiconductor laser apparatus (10) is provided and comprises a mounting substrate (6), a semiconductor laser chip (1) joined to a mounting surface (6a) of said mounting substrate (6) with solder (5), emitters (3) and non-active mesa portions (4) formed on a joining surface (1a) of said semiconductor laser chip (1) to be joined to said mounting surface (6a) of said mounting substrate (6); each of said emitters (3) and non-active mesa portions (4) being separated from the other by component separating channels (2) formed on said joining surface (1a) of said mounting substrate (1); wherein at least one mesa separating channel for separating said non-active mesa portion (4) is formed in said non-active mesa portion (4) at the joining surface (1a) of the semiconductor chip (1). Thereby, the joining strength of the solder is sufficient for preventing the separation of the semiconductor laser chip from the mounting substrate.

Abstract: A laser unit using circulating cooling water, which may economically maintain the cleanliness of the cooling water and a channel for the cooling water. By a command of an operator, the activation of a water conveying device of the laser unit, the start of the laser oscillation, the stop of the laser oscillation and the stop of the conveying device are sequentially executed. When the laser unit is stopped for a relatively long period, an intermittent conveyance mode is automatically started in the laser unit. In this mode, the conveyance of the water starts after the passing of a first predetermined period of time and the conveyance stops after the passing of a second predetermined period of time. Similarly, the start and the stop of the conveyance of the water by the conveying device are alternately changed. When the laser oscillation should be started, the intermittent conveyance mode is terminated by the operator.

Abstract: A cooling device for a semiconductor component which increases mechanical strength thereof and reduces a pressure loss of coolant. Plate members constituting the cooling device are formed with flow passages such as coolant supply and discharge openings, grooves divided by ridges, and through portions separated by projections or partitions. The ridges, projections, and partitions are joined to a adjacent plate member to increase the joining strength, which is further increased by forming the ridges, projections, and partitions of different plate members at the same positions. In the case of laminating the plate members having surfaces formed with solder layers, a number of minute vacant spaces are formed in those joining faces of the plate members which are not formed with passages, etc., and solder filets are formed over the entire joining faces to increase the joining strength. The grooves and through portions can be formed by chemical etching together with outer shapes of the plate members.

Abstract: A semiconductor laser device, including an LD array member having a monolithic linear-array configuration and provided with a plurality of emitters, respectively emitting a laser beam, in a parallel arrangement in a single semiconductor crystal. The LD array member includes a main area in which the emitters are disposed in the parallel arrangement, a first inactive area formed outside of the main area, and a second inactive area formed between the emitters disposed side-by-side in the main area. The first inactive area has a dimension larger than the second inactive area, as seen in a direction transverse to the plurality of emitters. The LD array member includes a first facet, in which emitting ends of the emitters are disposed, and a second facet opposite to the first facet; at least one of the first facet and the second facet being covered by a coating material.

Abstract: A cooling device suitable for cooling a laser diode bar constituting a surface illuminating device as a light source for exciting a laser medium of a solid-state laser oscillator of high power. The cooling device is capable of flowing coolant at sufficient flow rate by reducing the pressure loss in the flow passage of the coolant in the device, to realize a light source device of small thickness with high cooling capability and high reliability. The cooling device comprises a first plate member, one or more second plate member and a third plate member to be joined together to form a laminated body. The second plate member has grooved paths formed on both surfaces thereof and having depths greater than a half of thickness of the plate member, and also opened paths for communicating grooved paths formed on the first plate member and the third plate member.

Abstract: A light source device for pumping a solid-state laser medium of a laser generator, which is compact and capable of economically using LD bars constituting the LD stack with easy maintenance. The light source device is constituted by a plurality of LD modules. Each LD module comprises a plurality of cooling devices on which LD bars are respectively mounted and connection plates on both sides thereof. The LD bars are stacked such that longitudinal directions thereof extend perpendicular to a stacking direction thereof. A desired number of LD modules are mechanically connected with each other using the connection plates to form the LD stack. A sealing member is intervened between confronting connection plates of adjacent LD modules, so that flow passages of coolant formed in the respective LD modules are continuously connected. The connection plates have functions of fixedly supporting the cooling devices of each LD module and electrically connecting the adjacent LD modules.

Abstract: A semiconductor laser has emitters that are separated by LD stripes. Grooves are formed in a mounting substrate corresponding to both ends of the semiconductor laser. On mounting, fillets are formed in the grooves by the molten solder, thereby reinforcing the soldering at both ends of the semiconductor laser and enabling uniform bonding strength to be achieved.

Abstract: A light source device for pumping a solid-state laser medium of a laser generator, which is compact and capable of economically using LD bars constituting the LD stack with easy maintenance. The light source device is constituted by a plurality of LD modules. Each LD module comprises a plurality of cooling devices on which LD bars are respectively mounted and connection plates on both sides thereof. The LD bars are stacked such that longitudinal directions thereof extend perpendicular to a stacking direction thereof. A desired number of LD modules are mechanically connected with each other using the connection plates to form the LD stack. A sealing member is intervened between confronting connection plates of adjacent LD modules, so that flow passages of coolant formed in the respective LD modules are continuously connected. The connection plates have functions of fixedly supporting the cooling devices of each LD module and electrically connecting the adjacent LD modules.

Abstract: A cooling device suitable for cooling a laser diode bar constituting a surface illuminating device as a light source for exciting a laser medium of a solid-state laser oscillator of high power. The cooling device is capable of flowing coolant at sufficient flow rate by reducing the pressure loss in the flow passage of the coolant in the device, to realize a light source device of small thickness with high cooling capability and high reliability. The cooling device comprises a first plate member, one or more second plate member and a third plate member to be joined together to form a laminated body. The second plate member has grooved paths formed on both surfaces thereof and having depths greater than a half of thickness of the plate member, and also opened paths for communicating grooved paths formed on the first plate member and the third plate member.