The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Electro-optic side-chain polymers have been prepared via the Huisgen-reaction using an azide modified poly(methacrylate), an alkyne-terminated chromophore and adamantyl groups. The details of the polymer synthesis and measurement of the electro-optic properties are discussed. The elecrto-optic properties were measured by using the Teng-Man reflection technique for the poled thin films.
The Mach-Zehnder interference (MZI) modulator is the most common type of the EO waveguide modulator, while its operation has intrinsic problem. The operating point of the MZI modulator is controlled by applying bias voltage for keeping the linear transfer function between electric signal and output light intensity. In this paper, we design the multimode interference (MMI)-MZI EO polymer waveguide...
The electro-optic (EO) waveguide modulators based on the high EO active polymer are designed and fabricated. We show two types of the EO polymer waveguides. One is the waveguide having traditional core and clad structure, which shows a few volts of the half-wavelength voltage (Vπ) and 50 GHz bandwidth property. Another waveguide is the hybrid type, which is composed of the TiO2 high refractive index...
There are various mechanisms for displaying images on desktops to attract users' attention. These include pop-up window dialogs, banner images in Web browsers, and balloon-like taskbar notifications. However, these mechanisms have some limitations. First, these mechanisms depend on a particular OS or application. Second, the location of the display is restricted (e.g., Displayed only inside a Web...
The paper describes an automated measurement system for mechanical loss characterization of wires at cryogenic temperature. The important role of these measurements for the design of the Kamioka Gravitational Wave Detector (KAGRA) is highlighted. The experimental setup used to perform the measurements are presented and discussed. Furthermore, preliminary results obtained for a tungsten wire in term...
We proposed the fabrication method of nanofibers on Si substrate using FIB milling and selective wet etching for integrated optical applications. The diameter of nanofiber could be well-controlled from 2 μm to 300 nm.
This paper describes an elasticity sensing system for left ventricle of small laboratory animal. We first show the basic concept of the proposed method, where a ring shaped specimen is dilated by a balloon type probe using a pressure based control, and the elasticity of the specimen is estimated by using the stress and strain information. We introduce a dual cylinder model for approximating the strengths...
We report on the use of a knife blade as a scanning probe for scattering-type scanning near-field microscopy at millimeter wavelengths. Since the knife blade probe is a wider version of the metal tip antenna (whisker antenna) widely used in the terahertz and infrared regions, an improvement in signal intensity, and hence in the image contrast was expected. A scanning method and an image reconstruction...
This paper presents solutions to reduce measurement error and test time in an AC characteristic test of a source-synchronous device. In order to realize such a solution, we developed a multi strobe circuit which detects a phase difference between output clock and output data at a test cycle in real time without strobe scanning. We implemented a digital delay locked loop for precise multi strobe circuit...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.