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.
Phase change materials combined with silicon photonics are emerging as a promising platform to realize miniature photonic devices. We study the basic optical properties of a subwavelength-dimension silicon ridge waveguide with a 20-nm-thick Ge2Sb2Te5 (GST) top-clad layer. Numerical simulations show that the effective index of the Si-GST hybrid waveguide varies significantly when the GST changes from...
Bragg gratings are one of most powerful basic components for optical signal processing. They have been intensively used to construct various functional devices, such as lasers, modulators, WDM filters, optical delay lines, dispersion compensators, sensors etc. The Bragg grating can be regarded as one-dimensional photonic crystal whose performance can be easily tailored by changing the grating parameters...
We demonstrate a silicon QPSK modulator consisting of two nested Mach-Zehnder interferometers with 3.5 mm long traveling-wave electrodes. 64 Gb/s QPSK modulation is achieved with an EVM of 24.4% and power consumption of 7.1 pJ/bit.
We report our recent progress on reconfigurable self-coupled optical waveguide (SCOW) resonators as optical filters. The SCOW resonators exhibit high-order optical filtering features with less strict requirement on device fabrication as required in regular coupled microring filters.
We report a microring optical filter using Vernier effect. Tuning is enabled by a p-i-p resistor-based micro-heater integrated inside the resonators. Experiments show the filter wavelength can be tuned by 47 nm.
We present a reflective-type delay line using side-coupled integrated spaced sequence of resonators (SCISSOR) terminated with a Sagnac loop reflector. With 13 microrings, group delay of ∼150 ps is achieved with 170 GHz bandwidth.
We demonstrate the characterization of DNA optical microfiber devices fabricated by manually drawing. The strength, flexibility and optical loss are experimentally investigated. DNA optical microfiber devices are expected to be used as optical biosensors.
An all-fiber resonator composed of single-channel side-coupled microresonator sequence is proposed, in which a sequence of optical fibers, serve as microresonator, and a subwavelength-diameter optical fiber(SDF) with diameter about 1µm is placed along the microresonator perimeter, coupling light into whispering-gallery-modes(WGMs) of the microresonator. The transmission property and dispersion relation...
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.