Patent
Optical modulation by submillimeter-wave signals and applications thereof
TLDR
In this paper, a continuous-wave cyanide (HCN) laser has been employed to drive a continuous, traveling-wave lithium niobate (LiNbO3) electrooptic modulator at signal frequencies of 964 gHz.Abstract:
A continuous-wave cyanide (HCN) laser has been employed to drive a continuous, traveling-wave lithium niobate (LiNbO3) electrooptic modulator at signal frequencies of 964 gHz. (311 Mu m.) and at 891 gHz. (337 Mu m.). Part of the power of a visible 0.633- Mu m. carrier beam is converted into two visible sidebands, one of which is favored by the choice of phasematching angle. In a submillimeter communication system and in power metering of submillimeter radiation, angular separation of the beams makes attractive the up-conversion to the visible region, followed by detection. The large frequency separation of the visible carrier and the sidebands facilitates precision spectroscopic and metrological applications.read more
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Patent
Systems and methods for millimeter and sub-millimeter wave imaging
Leonid Volkov,Johan Stiens +1 more
TL;DR: In this article, a set of multiple phase-independent partials that are independently controllable and exhibit distinct physical features are used for image imaging, and a quasi-optical element is disposed between the field-of-view (FOV) and a multi-element receiver.
Patent
Terahertz-wave element, terahertz-wave detecting device, terahertz time-domain spectroscopy system, and tomography apparatus
TL;DR: A terahertz-wave element includes a waveguide (2, 4, 5) that includes an electro-optic crystal and allows light to propagate therethrough, and a coupling member (7) that causes a terashertz wave to enter the waveguide as discussed by the authors.
Patent
Method and apparatus for producing a non-linear interaction between two electromagnetic waves
TL;DR: In this paper, a non-linear interaction between two electromagnetic waves, e.g., a laser beam and a microwave beam, in a nonlinear optical medium, where one wave passes through a predetermined region of the medium in a zig-zag path, and the other traverses the region in two opposed directions in such a manner that an interaction-production phase-matching of the two waves is obtained not only in the departing but also in the approaching segments of the zigzag path.
Patent
Frequency stable pulsed laser
TL;DR: In this paper, a slave pulsed laser stabilizes the frequency by using the master laser frequency to stabilize a cavity in the slave PLS, which includes an end reflector, a laser generator, an optical injector, and an output coupler.
Patent
Electromagnetic thz wave generating device, electromagnetic thz wave detecting device, and time-domain spectroscopy apparatus
Ryota Sekiguchi,Kousuke Kajiki +1 more
TL;DR: In this article, an electromagnetic wave generating device is provided which includes an optical waveguide including a plurality of waveguide segments (101,104,107) such that the main lobe (111) of a combined electromagnetic wave has a substantially single large directivity.
References
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Patent
Method and apparatus for optical modulating a light signal
Gruber Carl L,Richards William E +1 more
TL;DR: In this article, the authors present a method and an approach for dynamically modifying a light or a MICROWAVE BEAM, which is referred to as MODULATING LIGHT BEAM.