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.
A four-in-one electrical method is proposed based on heterodyne spectrum mapping for self-calibrated frequency response measurements of high-speed semiconductor laser diodes, Mach–Zehnder modulators, phase modulators, and photodetectors with a shared self-heterodyne interferometer. The self-heterodyne interferometer provides mapping of the desired optical spectrum components from the optical domain...
III-nitride light emitting diodes (LEDs) have been used for many applications covering the spectrum of ultraviolet (UV) to visible light (VL). Despite of significant improvements on solid-state lighting, LEDs still suffer significant efficiency loss at high carrier density, commonly referred as "efficiency droop" [1]. However, compared to LEDs, laser diodes (LDs) have higher power per chip...
An electrical method for characterizing optical filters is proposed and demonstrated based on low-frequency detection, which enables magnitude frequency response measurement with hyperfine resolution up to 50 kHz and doubled measuring frequency range in the electrical domain.
Due to their high electrical resistance and breakdown strengths, the polymeric composites have been widely employed for outdoor insulations. Accurate determination of the dielectric permittivity and loss is crucial to assess the status and service life of electrical apparatus. Dielectric spectroscopy measurement is one of the important techniques in insulation diagnostics. As the contact-free method...
A self-calibrated method based on the frequency-shifted heterodyne scheme is proposed and demonstrated for independent frequency response measurement of high-speed Mach-Zehnder modulators (MZMs), phase modulators (PMs) and photodetectors (PDs) with the same setup.
The modulation characteristics of high-performance In0.1Ga0.9N/GaN continuous-wave (CW) ridge laser diode were demonstrated. The laser epitaxial structure was grown on (202̄1̄) by metal organic chemical vapor deposition (MOCVD) for high-power CW operation by adopting low-resistance top-side n-type contact design. The threshold current density of 1200 µm long and 3 µm wide cavity was 6.1 kA/cm2 in...
A novel short-circuited stubs loaded λ/4 resonator and its application to third-order dual-band bandpass filter are presented in this paper. Based on the analysis of resonance characteristics, it is found that the characteristics of the first passband can be conveniently controlled by the two loading shunt stubs, whereas that of the second passband are fixed. A third-order dual-band bandpass filter...
A simple and compact planar inverted-F antenna (PIFA) with size of 35 mm ?? 25 mm ?? 6 mm for personal communication handset applications is proposed in this paper. The radiating patch is folded at end and etched with two slits to create multiple resonant frequency bands. The antenna covers following frequency bands: Global System for Mobile communication (GSM900, 880-960 MHz)/Digital Communication...
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.