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| Number | Title | Issue Date |
| 4101847 | Laser control circuit The operating current level of an injection laser is stabilized at a point of maximum linearity. A test signal modulates the laser current, and the operating current level of the laser is automatically adjusted until the harmonic distortion component in t... | 07/18/1978 |
| 4092615 | Method of and apparatus for stabilizing output light of a current modulation laser device whose output is changed by changing an anode current A method of stabilizing output light of a current modulation laser device whose output light is changed by changing an anode current is disclosed. The method comprises detecting a part of a laser output light and converting that part of the laser output l... | 05/30/1978 |
| 4085387 | Stark-tuned laser modulator Apparatus is disclosed for modulating the R(18) or the R(24) lines of the (00°1 - 10°0) vibrational band of a C13 O216 laser using Stark-tuned absorption resonances in N14 H3. A dc electric field is... | 04/18/1978 |
| 4081670 | Automatic bias control circuit for injection lasers An injection laser is automatically stabilized so that the laser operates above threshold when the laser current is modulated. The invention makes use of the fact that the laser junction voltage saturates at currents above the threshold. A signal which mo... | 03/28/1978 |
| 4079339 | Light self-injecting semiconductor laser device A semiconductor laser device in which a part of the laser output is reflected from an external reflector and injected into the laser element with a delay that is less than the relaxation oscillation period of the laser pulse output.... | 03/14/1978 |
| 4071751 | Automatic optical bias control for light modulators In an electro-optic laser beam modulation system wherein the polarization modulation of the laser beam is converted into intensity modulation by an analyzer positioned in the path of the beam, a pair of photo-electric detectors detects a portion of the in... | 01/31/1978 |
| 4068197 | Apparatus for stabilizing beam for exposure An apparatus for stabilizing a laser beam to be used for exposure in an image-reproducing apparatus wherein said beam is suitably controlled by image signals obtained from the scanning of the original beam as modulated. A laser beam, after being suitably ... | 01/10/1978 |
| 4039251 | Tapered crystal modulator for lasers A tapered crystal for use in a laser modulator in a communication system reduces switching voltage and driving power requirements. Alternately, the crystals are tapered for reduced crystal capacitance, thus decreasing the modulator rise time.... | 08/02/1977 |
| 4035081 | Laser gyroscope In a laser gyroscope it is desirable for precision operation to eliminate or effectively compensate temperature variations, as well as manufacturing tolerances. To this end the present laser gyroscope has two ring lasers physically arranged so close to ea... | 07/12/1977 |
| 4024466 | Laser containing a laser resonator A laser containing a laser resonator possessing a laser rod and an electro-optical modulation device between two mirrors. The modulation device comprises a polarization element and a component embodying an electro-optical crystal at the opposite faces of ... | 05/17/1977 |
| 4019155 | Acousto-optic modulated laser A gas laser tube has a spherical reflector at one end and a flat mirror at the other end. An acoustooptic modulator is attached to the flat mirror. The modulator is positioned so that the generated acoustic wave intersects the laser beam at the Bragg angl... | 04/19/1977 |
| 4009385 | Laser control circuit A control circuit for an injection laser includes a driver circuit which applies a driving current to the laser in response to an electrical modulating signal. A prebias circuit applies a prebias current to the laser in response to the difference between ... | 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 |
| 3999146 | Semiconductor laser device A semiconductor laser device is disclosed in which an external light beam having a wavelength approximately the same as at least one of the wavelengths of the resonance axial mode for the modulation semiconductor laser to oscillate is injected into the op... | 12/21/1976 |
| 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 |
| 3973216 | Laser with a high frequency rate of modulation A dye laser having a high frequency rate of modulation wherein a Franz-Kesh filter is in the laser cavity to quench Q, and thereby provide modulation. The filter has an absorption edge that shifts in response to an applied electric field, thereby, modula... | 08/03/1976 |
| 3970961 | Thermionic cathode transverse-discharge gas laser tube An improved transverse-discharge gas laser tube is provided by positioning thermionic cathodes diametrically opposite each other across the plasma location with anodes positioned at 90° to the cathodes all contained within an electron repelling envelope.... | 07/20/1976 |
| 3965440 | Tunable laser oscillator A laser oscillator circuit is disclosed which allows the operating frequency of the laser to be tuned over a wide range of frequencies in response to a wideband control signal. A laser oscillator such as that disclosed is useful in optical communications ... | 06/22/1976 |
| 3953809 | Injection laser modulator A carrier-injected avalanche device series connected to a forwardly-poled injection laser generates a current pulse, which may be as short as one nanosecond, through the injection laser only when both a direct current bias voltage is applied across this s... | 04/27/1976 |
| 3942132 | Combined electron beam semiconductor modulator and junction laser A combined pulse modulated laser in which a modulated cold cathode device is utilized to excite a combined electron beam bombarded semiconductor device grown integrally with a crystal laser to achieve modulation of the laser output with fast rise and fall... | 03/02/1976 |
| 3938060 | Device for modulating intensity of light rays generated from gas laser A device for modulating the intensity of light rays generated from a gas laser in which an input modulating signal is supplied to a switching element included in a modulating current supply source connected across a gas laser discharge tube to control the... | 02/10/1976 |
| 3936769 | Acousto-optically Q-switched laser with modulated output A techinque for modulating the output signal of an acousto-optically Q-switched laser is disclosed. The switch is energized with an acoustic wave having a frequency equal to the approximate frequency spacing between longitudinal lasing modes of the laser.... | 02/03/1976 |
