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| Number | Title | Issue Date |
| 4104598 | Laser internal coupling modulation arrangement with wire grid polarizer serving as a reflector and coupler A laser internal coupling modulation arrangement is disclosed wherein a wire grid polarizer serves as one of the reflectors forming part of the laser optical cavity, as a polarization selector which constrains the laser oscillation to a desired linear pol... | 08/01/1978 |
| 4101707 | Homogeneous multilayer dielectric mirror and method of making same A multilayer dielectric mirror wherein the mirror substrate is of garnet. Chemical-mechanical final polishing of the substrate provides a surface relatively free of inhomogeneous strain for the deposition thereon of relatively homogeneous individual layer... | 07/18/1978 |
| 4099840 | Multilayer reflector for gas discharge laser A multilayer reflector of which the last layer most remote from the substrate and having a high refractive index is vapor-deposited from a mixture containing a metal or oxide of an element from group 4b of the periodic table and a metal oxide from the gro... | 07/11/1978 |
| 4096447 | Unstable resonator laser system Optical radiation reflective surfaces for use in an unstable resonator laser system in which the output beam of the system does not contain an aperture in the middle of the beam thereby avoiding the requirement of a collimation lens system to obtain a bea... | 06/20/1978 |
| 4087766 | Laser having beam terminating mechanism A laser is described having a protective mechanism for terminating its output beam without requiring the laser power to be disconnected. Such protective mechanism includes a barrier located within the laser optical cavity for movement between a position p... | 05/02/1978 |
| 4084883 | Reflective polarization retarder and laser apparatus utilizing same A reflective thin film polarization retardation device which is adapted for use in active mirror laser apparatus is described. The device permits obtaining phase retardation of light, different amounts of which may be readily obtained. Retardation results... | 04/18/1978 |
| 4050035 | Self-aligned polarized laser A laser of the type which generates linearly polarized light and including optical means for self-alignment. Among such polarized lasers are, for example, solid state lasers and particularly ruby lasers, as well as various gas lasers employing Brewster wi... | 09/20/1977 |
| 4050036 | Optical system for lasers A laser configuration is disclosed wherein the active region is of annular cylindrical form. Zero mode azimuth coupling which produces an output beam of low obscuration ratio in the near field, thereby providing a single lobe in the far field, is achieved... | 09/20/1977 |
| 4050034 | In cavity pumping for infrared laser A far infrared laser having a CO2 laser gas cell located in the same optical cavity as the far infrared cell. The CO2 gas is made to flow through the CO2 cell within the laser cavity and the far infrared gas is made to flo... | 09/20/1977 |
| 4039851 | Time dispersion tuned Raman oscillator There is disclosed a time-dispersion tuned Raman oscillator which makes use of the frequency-dependent transit time of Stokes radiation through a long optical fiber. Time-dispersion tuning is effected by synchronizing Stokes radiation of the desired frequ... | 08/02/1977 |
| 4025172 | Compound unstable resonator A modification to the reflective surfaces in unstable resonator assemblies to improve the operating characteristics of such devices and enhance the quality in the far field of the output beam from such resonators is disclosed. Some modifications include t... | 05/24/1977 |
| 4023119 | Laser output coupler The invention pertains to a laser apparatus which includes a laser cavity containing a laser medium, such as methyl fluoride or formic acid, which has a characteristic wavelength in the far infrared region of the spectrum. The laser cavity has first and s... | 05/10/1977 |
| 4011524 | Optical element for a laser An optical element for a laser, such as a mirror, includes a rectangular parallelepiped body of a material suitable for the element, such as glass, and a cylindrical projection extending from one surface of the body. The projection is smaller in area than... | 03/08/1977 |
| 4009933 | Polarization-selective laser mirror An optical substrate has an electrically conductive grating on one surface. Over the grating is a multilayered dielectric coating.... | 03/01/1977 |
| 4009453 | Narrow-band interference filter and its application in a laser system A narrow-band interference filter comprises a plurality of alternating reflective dielectric layer systems arranged in a serial sequence in layer form on a substrate. Each system has a construction pattern (HL)2 H, and a pair of spacing layers ... | 02/22/1977 |
| 4008444 | Feedback control of a laser output In a method and apparatus for producing and controlling a beam of radiation such as a laser beam issuing from a gaseous working medium in a working region wherein the gas is subjected to an electric field and an ionizing beam is directed to the gas, ioniz... | 02/15/1977 |
| 4004248 | Control of timing of laser operation To prevent time jitter of laser action after occurrence of an event -- such s energization of the laser -- after a reference time, in which the laser is stimulated to emission after having received a pump pulse energy slightly less than the laser threshold... | 01/18/1977 |
| 3996527 | Gas laser optical system A laser discharge tube has a separate light reflector means positioned at each end of the tube. One of the light reflector means has a plurality of facets for reflecting the light traveling through the laser tube. The novel system defines a folded optical... | 12/07/1976 |
| 3995230 | Laser An improved laser system having a Q-switch which is a roof prism rotatable about a spinning axis transverse to the axis of the laser rod, in which the medial plane of the prism is offset from the axis of the rod to receive output radiation from the rod on... | 11/30/1976 |
| 3975692 | Control of laser output characteristics by fluid streams A method and means for controlling the output characteristics of a laser in which the optical axis of the laser output, either within the optical cavity of said laser or outside of said cavity, is transected with a fluid stream. The laser output may eithe... | 08/17/1976 |
| 3970960 | Broadly tunable continuous-wave laser using color centers Broadly tunable infrared lasers analogous to dye lasers operating in the visible spectrum are provided by significant improvements upon an FA (II) color center laser previously demonstrated in a limited way. The improvements include techniques ... | 07/20/1976 |
| 3967211 | Laser wavelength stabilization A system for stabilizing the frequency of a laser employing the variation in position of interference patterns which results from a variation in laser beam frequency in passing through a Fabry Perot etalon filter. The system is particularly useful for mai... | 06/29/1976 |
| 3967212 | Flash lamp pumped dye laser An optical cavity for a flash lamp pumped dye laser including a pumping cavity, a birefringent filter and a plurality of frequency doubling crystals. Within the pumping cavity the flash lamp is cooled by forced air convection and operated with a D.C. simm... | 06/29/1976 |
| 3961283 | Waveguide gas laser with wavelength selective guide A waveguide gas laser is disclosed wherein narrow resonances in the loss vs. wavelength characteristics of a hollow waveguide laser resonator are employed to achieve wavelength selectivity. The laser includes a capillary bore waveguide of radius a and len... | 06/01/1976 |
| 3959738 | Laser An improved laser particularly well adapted to produce high flux densities is disclosed. The disclosed laser includes an optical cavity wherein a curved window and a convex mirror make up one end wall assembly, such window and mirror being disposed with r... | 05/25/1976 |
| 3947780 | Acoustooptic mode-locker frequency doubler An improved laser construction having relatively simple single element means located in the laser cavity for simultaneously mode-locking and frequency doubling the laser output, said single element means including a crystal such as a non-linear barium sod... | 03/30/1976 |
| 3943461 | High power multibeam laser A high power multibeam laser has an improved output coupling mirror comprised of a plurality of mirror elements attached to an adjustable mirror-supporting member. The inner face of the output coupling mirror lies in a single plane which is perpendicular ... | 03/09/1976 |
| 3936768 | Molecular gas laser device with an improved output mirror means A high power multibeam laser having an improved output coupling mirror comprised of either a single mirror or a plurality of mirror elements attached to a mirror-supporting member. The inner face of the output coupling mirror, whether it be composed of a ... | 02/03/1976 |
