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| Number | Title | Issue Date |
| 4468773 | Laser control apparatus and method A laser control apparatus for use with a laser having output radiation including an intermodal beat frequency and electric signal responsive means for controlling the light frequency from the laser; radiation responsive electric signal means adapted for a... | 08/28/1984 |
| 4460249 | Control system for an optical modulator A control system for a laser-intensity-modulator system to maintain the modulated component of the output beam at a constant amplitude. The electro-optical modulator has a resonant driving circuit supplied by a voltage controlled oscillator. A portion of ... | 07/17/1984 |
| 4434490 | Spectrophone stabilized laser with line center offset frequency control Continuous offset tuning of a frequency stabilized cw gas laser (10) is achieved by using a spectrophone (14) filled with the same gas as the laser for sensing a dither modulation, detecting a first or second derivative of the spectrophone output with a l... | 02/28/1984 |
| 4397025 | Dual frequency laser A method and apparatus for operating a dual-frequency gas laser so as to controllably switch between frequencies makes use of a cavity so tuned that the comb of resonant frequencies is not commensurate with the frequency difference between the laser opera... | 08/02/1983 |
| 4385386 | Laser apparatus A laser apparatus including first and second frequency sweeping laser devices, the sweep frequency range of each being different. The output laser beams of the first and second laser devices are multiplexed by a multiplexer. The output laser beam of the m... | 05/24/1983 |
| 4314210 | Mode-locking and chirping system for lasers A single electro-optic device is provided for simultaneously mode-locking and chirping the output of a laser by simultaneously applying to the electrodes of the electro-optic device a periodic signal superimposed on a voltage ramp. The electro-optic devic... | 02/02/1982 |
| 4219785 | Optical beam scanning by phase delays A light beam scanner of the moving interference fringe pattern type which includes a body of semiconductor material having a source of coherent radiation and wave guides for guiding the coherent radiation along a plurality of spatially displaced paths whi... | 08/26/1980 |
| 4180784 | Frequency modulated electrical discharge laser An improvement in an electrical discharge laser. The improvement consists of modulating the input power to the laser; specifically, in the case of a gas laser for instance, either (1) the power to the electron gun which produces an electron beam used for ... | 12/25/1979 |
| 4109218 | Method for the generation of frequency-transferred electromagnetic waves A method for the controlled generation and amplification of electromagnetic waves and systems utilizing these waves are disclosed. An incident electromagnetic wave of a given frequency stimulates a beam of moving charged particles to radiate in a polariza... | 08/22/1978 |
| 4088898 | Rotating optical frequency chirp device A system for generating pulses of laser radiation which vary in frequency with time to achieve a "chirp" or frequency sweep. In a preferred embodiment, a variable-thickness, rapidly rotating disk of optically-dense material is placed in the optical loop o... | 05/09/1978 |
| 3940712 | Modulation techniques for lasers An arrangement for frequency modulating a laser beam utilizes an optical prism which is disposed within the laser cavity such that the beam continuously experiences total internal reflection from one face thereof as an optical element having an index of r... | 02/24/1976 |
| 3938365 | Detecting trace gaseous species acoustically in response to radiation from an intense light source An intense light source, preferably of high monochromaticity, having its beam modulated at a frequency corresponding to an acoustical resonant frequency of a sample chamber energizes the sample chamber along its axis. A photoelectric detector provides a s... | 02/17/1976 |
