A light emitting sealed body includes: a housing which stores a discharge gas and is provided with a first opening to which first light is incident along a first optical axis and a second opening from which second light is emitted along a second optical axis; a first window portion which hermetically seals the first opening; a second window portion which hermetically seals the second opening; and a first electrode and a second electrode. The housing is formed of a light shielding material which does not transmit the first light and the second light. An internal space is defined by the housing, the first window portion, and the second window portion and the internal space is filled with the discharge gas. The first opening and the second opening are disposed so that the first optical axis and the second optical axis intersect each other.

Provided is a laser processing machine having a Peltier refrigeration element for cooling a cooling medium of a laser oscillator in a body of a small household laser processing machine. A laser processing machine 1 includes a device body 10, a laser oscillator 71 received in the device body 10, a cooling medium flow path provided in the device body 10 for allowing a cooling medium of the laser oscillator 71 to flow, and a cooling device 45 provided with a Peltier refrigeration element for refrigerating the cooling medium flowing in the cooling flow path. A cooling fin 621 for discharging heat generated by the Peltier refrigeration element is connected to the cooling device 45. The cooling fin 621 is installed directly upstream of an airflow direction of an air outlet 121 for discharging air in the device body 10 out of the device body 10.

A folded slab waveguide laser having a hybrid waveguide-unstable resonator cavity. Multiple slab waveguides of thickness t supporting vertical waveguide modes are physically arranged above one another in a stack and optically arranged in series through one or more cavity folding assemblies with curved mirrors. A gain medium such as a gas is arranged in each slab. Each cavity folding assembly is designed to redirect the radiation beam emitted from one slab waveguide into the next waveguide and also at the same time to provide a focus for the radiation beam so that a selected vertical waveguide mode (or modes) is (or are) coupled efficiently into the next slab.

A laser gas regeneration system for an excimer laser includes a first pipe capable of supplying a laser chamber with a first laser gas, a second pipe capable of supplying the laser chamber with a second laser gas having a halogen gas concentration higher than that of the first laser gas, a third pipe allowing a gas exhausted from the laser chamber to pass therethrough, a gas refiner that refines the gas having passed through the third pipe, a branch that causes the refined gas to divide and flow into a fourth pipe and a fifth pipe, a first regenerated gas supplier that supplies the first pipe with a gas having divided and flowed into the fourth pipe, and a second regenerated gas supplier that adds a halogen gas to a gas having divided and flowed into the fifth pipe and supplies the second pipe with the halogen-added gas.

A laser chamber of an excimer laser apparatus includes a container including a first member and a second member and configured to accommodate a laser gas in the container and a seal member disposed between two seal surfaces facing each other, a seal surface of the first member and a seal surface of the second member. A laser-gas-side surface of the seal member is made of fluorine-based rubber, and an atmosphere-side surface of the seal member is formed of a film configured to suppress atmosphere transmission.

A tunable laser has a first mirror, a second mirror, a gain medium, and a directional coupler. The first mirror and the second mirror form an optical resonator. The gain medium and the directional coupler are, at least partially, in an optical path of the optical resonator. The first mirror and the second mirror comprise binary super gratings. Both the first mirror and the second mirror have high reflectivity. The directional coupler provides an output coupler for the tunable laser.

An improved dental laser system has been developed to cut enamel quickly and precisely, without detrimental residual energy, to provide a replacement for conventional high speed rotary burrs and commercially available dental laser systems.

An improved dental laser system has been developed to cut enamel quickly and precisely, without detrimental residual energy, to provide a replacement for conventional high speed rotary burrs and commercially available dental laser systems.

A folded slab waveguide laser having a hybrid waveguide-unstable resonator cavity. Multiple slab waveguides of thickness t supporting vertical waveguide modes are physically arranged above one another in a stack and optically arranged in series through one or more cavity folding assemblies with curved mirrors. A gain medium such as a gas is arranged in each slab. Each cavity folding assembly is designed to redirect the radiation beam emitted from one slab waveguide into the next waveguide and also at the same time to provide a focus for the radiation beam so that a selected vertical waveguide mode (or modes) is (or are) coupled efficiently into the next slab.

Disclosed are apparatuses, systems, methods, and computer program products for monitoring the health of a laser such as solid-state laser or a gas laser. For example, the laser may be included in a laser machining system. The laser may be controlled by controller and an interface to communicate with the laser including status information and commands. The laser health monitor passively receives the status information from the laser and the commands to the laser without disturbing the communication between the laser and the laser controller. The laser health monitor generates alerts when one or more rules applied to the laser status information indicate a condition such as stale gas, low energy production, incorrect voltages, as well as other conditions. The alerts may be sent via email or SMS message or another communication mechanism to a recipient.