Patent application serial number 878197 has not been assigned to a company or institution.
The following quote was obtained by the news editors from the background information supplied by the inventors: "The invention relates to digital integrated optical modulators. More particularly, it pertains to a modulator for a fiber optic signal transmission or measuring device.
"A digital phase modulator with increased resolution for a fiber optic signal transmission or measuring device is known from patent document DE 103 078 525 B4. As shown, the resolution of digital electrodes is increased to a range of 12 to 13 bits by combining binary and non-binary electrodes to form a coarse modulator and a fine modulator with the chip length required being the same as a binary 9-bit arrangement.
"Although the above-described solution allows increased resolution of 12 or 13 bits while maintaining the total chip length, the resolution cannot be further increased with the described device because the total chip length cannot be kept in a configuration such as taught in DE 103 07 525 B4. This is due to the fact that total chip length required depends on the minimum overall length of the smallest electrode (LSB electrode). The bit weight for a very short LSB electrode (in particular for a binary/non-binary arrangement) can be precisely determined only with considerable difficulty. For this reason, certain minimum lengths are required for the LSB electrode. The length of the LSB electrode, in turn, also accounts for the length of the longest or most significant bit electrode (MSB electrode) which must be twice the length of the second longest electrode.
"Since technical requirements focus on resolution that is further increased by a 16-bit phase modulator, for example, in order to reduce the quantization error and, therefore, the quantization noise in a fiber optic gyroscope, a higher-bit design must be created without adversely changing the overall length.
"In addition to applications of digital phase modulators in reciprocal interferometers (fiber optic gyroscope, fiber optic current sensor), applications are also possible in integrated optical amplitude modulators (Mach-Zehnder interferometers). Such digital modulators can be applied in satellite tracking for optical transmission in space or in digital laser exposure devices (digital generation of color grades). A further application is a digital frequency modulator in a laser Doppler anemometer. A phase modulator is, at the same time, a frequency modulator (generation of side bands). In general, it is possible to implement all of those applications that have so far used merely analog phase, frequency or amplitude modulation in connection with an integrated optical modulator."
In addition to the background information obtained for this patent application, VerticalNews journalists also obtained the inventors' summary information for this patent application: "It is an object of the present invention to provide a digital modulator for a fiber optic signal transmission or measuring device in which a 16-bit digital electrode arrangement can be implemented by an appropriate arrangement of the electrodes while maintaining total chip length.
"The present invention addresses the foregoing object by providing a digital integrated optical modulator having two waveguide arms and electrodes that are arranged along both waveguide arms in or on an optical substrate.
"According to the invention, the arrangements of the electrodes along the two waveguide arms differ from one another.
"The preceding and other features of the invention will become further apparent from the detailed description that follows. Such written description is accompanied by a set of drawing figures. Numerals of the drawing figures, corresponding to those of the written description, point to the features of the invention with like numerals referring to like features throughout both the written description and the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
"FIG. 1 illustrates an electrode arrangement of a 16-bit modulator;
"FIG. 2 illustrates the waveguide sections in an integrated optical modulator; and
"FIG. 3 illustrates an arrangement of the five smallest electrodes of a 16-bit modulator."
URL and more information on this patent application, see: Voigt, Sven. Electrooptical Digital Waveguide Modulator. U.S. Patent Application Serial Number 878197, filed
Keywords for this news article include: Patents.
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