74 results about "Solid state amplifiers" patented technology

A ring laser includes a large-core rare-earth-doped fiber ring-connected with a free-space path having an electro-optic switch, output coupler, and intracavity band-pass filter to enforce lasing operation in narrow wavelength range. In some cavity-dumped modes, the laser is configured in a similar manner, except that an output coupler is omitted since the optical power is extracted from the laser cavity by the electro-optic switch itself. The same laser can be configured to operate in Q-switched and / or cavity-dumping modes as well as in hybrid modes (e.g., partial Q-switch, followed by cavity dumping, or even CW). In some embodiments, the laser can be used as, or inject laser light into, a regenerative solid-state amplifier, or a Raman laser, or can be also used to generate visible, ultra-violet, mid-infrared, and far-infrared (THz) radiation via nonlinear wavelength conversion processes. The various embodiments can use a power oscillator or seed-plus-amplifier MOPA configuration.

A laser light-source apparatus includes: a seed light source; a fiber amplifier configured to amplify pulse light output from the seed light source based on gain switching; a solid state amplifier configured to further amplify the resultant pulse light; a nonlinear optical element configured to perform wavelength conversion on the pulse light output from the solid state amplifier; an optical switching element that is disposed between the fiber amplifier and the solid state amplifier and is configured to remove ASE noise; and a control unit. The control unit is configured to control the optical switching element in such a manner that propagation of light is permitted in an output period of the pulse light from the seed light source, and is stopped in a period other than the output period.

A laser light-source apparatus includes: fiber amplifiers and a solid state amplifier configured to amplify pulse light output from a seed light source based on gain switching; nonlinear optical elements configured to perform wavelength conversion on the pulse light output from the solid state amplifier; an optical switching element configured to permit or stop propagation of pulse light from the fiber amplifier to the solid state amplifier; and a control unit configured to control the optical switching element in such a manner that the propagation of the light is stopped in an output period of the pulse light from the seed light source, and permitted in a period other than the output period of the pulse light from the seed light source.

A microwave transmitter circuit including a divider series feed signal line, collector series feed signal line, a plurality of parallel solid state amplifier coupler circuits connected between the divider series feed line and the collector series feed line, and phase shifting circuitry distributed along the collector series feed line for compensating phase tracking error between the divider series feed line and the collector series feed line.

The invention relates to an electron source device for an ultrafast electron diffraction and ultrafast electron microscope. The electron source device comprises a low-power microwave signal source, a phase shifter, a solid amplifier, a klystron, an attenuator and a current circulator, wherein the first phase shifter, the solid amplifier and the klystron are sequentially arranged in the direction along microwave signals output by the low-power microwave signal source, the output end of the klystron is connected with the input end of the power distributor, megawatt level microwave signals output by the klystron are divided into two paths by the power distributor, the first path of microwave signals are input into a cavity 1.5 arranged at the front part of an electron gun sequentially through the first attenuator and the current circulator, and the second path of microwave signals are input into a single cavity arranged at the back part of the electron gun sequentially through the second attenuator and the second phase shifter. The electron source device has the advantages that the beam current divergence degree is inhibited from 10<-3> to a value below 10<-5>, and the space resolution of the ultrafast electron diffraction is improved.