摘要:
A modular laser demonstration apparatus is taught by this invention and is made up of two modular assemblies, an optical resonator and a laser pump module. The optical resonator comprises a separation means and front and rear reflector assemblies. Each of the reflector assemblies has a first adjustable attachment means to adjustably attach at least one mirror selected from a set of interchangeable mirrors to its respective reflector assembly and a second attachment means comprising a plurality of clamp means to slidably mount the reflector assembly to the separation means in a manner that confines the sliding motion to a single plane along the axis of the separation means. Furthermore, the front reflector assembly has a laser beam penetration opening to allow a laser beam generated by the modular laser demonstration apparatus to exit the apparatus for use in laser demonstrations, experiments and the like. The laser pump module comprises a removable cavity module and a non-electrically conductive cavity module cradle. The removable cavity module comprising a lamp selected from a set of interchangeable lamps, a lase material rod selected from a set of interchangeable lase material rods, a modular optical coupler selected from a set of interchangeable optical couplers, each optical coupler of said set having an optical coupling face and an outer peripheral shape. The outer peripheral shape being the same among all optical couplers to ensure interchangeability.
摘要:
An optical system for end-pumping the gain medium of a three-level or a self-terminating solid state laser with the optical output from a wide aperture laser diode bar is disclosed. In a preferred embodiment, the optical system includes: a laser diode bar for emitting from an elongated emissive area thereof a bright light having a lateral divergence and a transverse divergence; and an optical assembly disposed between the laser diode bar and the three-level solid state laser for collecting and focusing the bright light into a relatively small high-intensity spot to end-pump the gain medium of the three-level or self-terminating solid state laser.
摘要:
An air cooled, flash lamp pumped, solid state laser device wherein heating devices are disposed on the laser rod at both ends to heat and temperature stabilize the laser rod. The solid state, laser rod is longer than the arc length of the flash lamp. The ends of the laser rod can be heated directly by winding heating wire, such as Nichrome, around each end or by applying heat through thermal conductive supports. A feedback loop is provided to maintain temperature of the solid state laser rod, which is preferably Alexandrite, within a desired range of 80.degree. C. to 120.degree. C.
摘要:
The invention is directed to a solid state laser wherein the pump sources are connected with holding parts and can be seated into a predetermined and reproducible position with mechanical guides and stops. In this way, an exchange of the pump sources is possible without a new adjustment or a readjustment.
摘要:
In a solid-state laser device comprising a slab-shaped laser medium, first through n-th excitation units are arranged on the slab-shaped laser medium to define first through n-th partial zones and to generate first through n-th laser beams from the first through n-th partial zones along optical axes, respectively. In order to selectively energize the first through n-th excitation units, a reference light beam is previously generated by a beam generator to be delivered through a fixed mirror and a beam distributor to a selected one of the first through n-th partial zones. Thereafter, the reference light beam travels through the slected partial zone to be received by a photosensor. The photosensor detects the selected partial zone to energize a selected one of the first through n-th excitation units that is made to correspond to the selected partial zone. The selected partial zone is excited by the selected excitation unit to generate a selected one of the first through n-th laser beams that is produced through the fixed mirror as the output laser beam. The beam distributor may comprise a rotatable prismal block and first through n-th reflectors which are selectively confronted with the first through n-th partial zones during rotation of the prismal block. Alternatively, first through n-th reflectors may be attached to a support pole.
摘要:
In a laser apparatus which includes a laser medium exhibiting thermally induced optical distortions, and flash lamp mounted near the laser medium to provide laser pumping radiation, an absorbing filter is mounted between the flash lamp and the laser medium for absorbing radiation in the output spectrum of the lamp which exhibits a low fluorescence efficiency in the laser medium. By absorbing radiation with the low fluorescence efficiency in the laser medium, heat which develops in the laser medium can be limited to control the thermally induced optical distortions.
摘要:
A multiple crystal, single pumping cavity laser system comprises an optical pumping chamber, several laser crystal rods disposed in the chamber and having differently sized diameters and with their axes parallel, an optical coupling device for coupling the rods in a chain of increasing diametrical size, an optical pumping source for providing an optimum pumping level for the largest rod, and attenuators for all but the largest sized rod for attenuating the energy absorbed by the smaller rods. All of the laser rods are disposed and pumped in a single pumping chamber. The housing containing the pumping chamber is thermally and mechanically isolated from the rail holding the other system components to prevent shock from being transmitted to the other components.
摘要:
A laser type initiator device for activating air crew emergency escape systems and the like comprising a housing having a generally cylindrical chamber and defining a trough opening at one end of same, with the chamber and opening being coaxially oriented, a laser rod extending centrally of the chamber and frictionally retained in the housing through opening and equipped for optical pumping for directing a laser beam through the housing through opening, as into a fiber optic cable that is releasably secured to the housing in alignment with the trough opening, a flash bulb assembly received about the laser rod including a pyrex glass tube that receives and protects the laser rod and a plurality of percussion type flash bulbs received about the tube, which flash bulbs are disposed to have their primed ends all positioned crosswise of a common plane that is transverse of the axis of the laser rod, a striker assembly mounted adjacent the primed ends of the flash bulbs and having for each of the flash bulb primed ends a separate resilient swing arm that acts in the indicated transverse plane for resiliently striking the respective flash bulb primed ends to ignite the flash bulbs, an actuator assembly received over the stroker assembly and mounted for movement axially of the laser rod and including a camming arrangement for stroking the respective swing arms to resiliently stress same rotationally of the laser rod axis in one direction of movement of the actuator assembly, and an actuator assembly movement inducing device for effecting a rotatably connected purchase on the actuator assembly for moving to in effect cock the respective swing arms for striking of the respective flash bulbs on release of the actuator assembly movement inducer.
摘要:
Improvement in a laser having a solid transparent housing with two cavities for respectively holding a laser rod and a pump lamp. The rod is embedded along its total length within the housing; the pump lamp is embedded along its total arc and over a substantial length of each of its electrode regions within the housing. clearance between lamp envelope and housing is held to close tolerances. Optional beam tubes provided at the end of the rod at the housing shield the laser beam from thermal distortion. Flashlamps having a cerium-doped quartz envelope are particularly desirable for pumping this laser.
摘要:
An apparatus for controlling a laser device comprises means for outputting at least two levels of reference voltage from which a reference voltage is selected in accordance with the consecutive excited time of a laser rod which is excited to emit laser light by a light source. The light source is turned on under a charged voltage of capacitance th level of which is controlled in comparison with the reference voltage so that the laser light is precisely controlled in its energy density and radiation angle to avoid the influence of thermal lens effect of the laser element. This is accomplished by selecting an appropriate level of the reference voltage from the two or more levels of reference voltage.