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 300mm Si photonics platform has been established for optical multi-applications. For device fabrication process, the advanced CMOS technology can lead to the performance improvement of optical devices. State-of-the-art propagation loss values are obtained for optical waveguides of multi-thickness SOI structures in this platform and discussed them theoretically. 50×50mm2 large Si interposers with...
Transverse frequency conversion in the sub-bandgap spectral region is investigated in semiconductor nanowires and nanoribbons by using CW lasers with pump power less than 1 mW. It is found that the properties of the emissions are strongly dependent on the cross-sectional geometries and the surrounding media of nano-waveguides. Compared with birefringent approach, transverse frequency conversion shows...
We propose a dual-polarization signal-carrier interleaved direct detection (DP-SCI-DD) scheme to achieve 100% spectrum efficiency with reference to single polarization coherent detection. The channel is modeled as a discrete time Gaussian channel with conjugate inter-symbol interference.
We report on our design and simulation of superconducting single-photon detectors, based on ultra-narrow nanowire (30 nm) integrated with waveguides, to achieve broadband (wavelength: 1.2 micrometer to 1.7 micrometer) absorptance >0.99 for two orthogonal polarizations.
We experimentally demonstrate a novel coherent optical packet switching architecture for data center networks. This architecture uses coherent polarization-division multiplexed QPSK modulation to increase the capacity and relies on self-homodyne transmission for automatic tuning of the receiver LO. Information bearing packets and pilot tone signals are routed thought separated arrayed wavelength gratings...
We demonstrate a polarization diversity scheme using fiber polarization splitters for 4×4 Si-wire optical switch. Path-independent on-chip loss of 4.8±0.5 dB and crosstalk of less than −30 dB are achieved with PDL below 1 dB.
Applications of stimulated Brillouin scattering in high-resolution spectral analysis, generation of low-noise millimeter and THz-carriers, generation of broadband high-quality sinc-shaped pulses and realization of microwave photonics band-pass filters, are proposed and demonstrated experimentally.
We give a brief overview on the status of fiber-based noise-like pulse (NLP) research. In addition, we present studies on the coherence characteristics of NLPs in nonlinear polarization rotation-based erbium-doped fiber ring cavity configurations.
Optical phase conjugation has shown interesting prospects for nonlinear compensation in transmission systems. Here we review the concept and recent progress of a system designed to maximize its benefits, leading to linearized WDM transmission systems.
A photonic nanotube is proposed as a novel nano-structured hollow-core optical fiber. An optical mode is successfully confined in ∼100-nm hollow core with a confinement factor greater than 50% and a low refractive index.
We show application schemes of the Walsh-Hadamard transform method to mitigate optical filtering and polarization dependent loss effects. Conducted experiments demonstrate for the first time that the method effectively improves overall performances of super-channel transmission.
The rapid development of nanotechnology, such as microelectromechanical systems (MEMS), microelectronics and nanophotonics, has led to the emerging attentions in achieving functional optoelectronic structures and/or metamaterials at micro and nanoscale resolution. Multiphoton absorption nanofabrication has demonstrated its great potential for applications in preparation of complex three-dimensional...
A fully characterization of an active optical filter based on an equivalent-phase-shifted DFB-SOA in transmission is experimentally demonstrated. The influences of driven current on transmission characteristics of the DFB-SOA are analyzed.
A widely tunable optoelectronic oscillator based on balanced detection is proposed and experimentally demonstrated. A frequency tunable range from 4 GHz to 16 GHz is achieved. The phase noise of the generated signal is reduced to about −105 dBc/Hz.
A highly-birefringent phase-shifted fiber Bragg grating (PS-FBG) was inscribed with femtosecond laser and a uniform phase mask. The PS-FBG was fabricated from an ordinary FBG in case over exposure was applied. The spectral evolution from FBG to FS-FBG was observed in accompany with a decrease in transmission loss, a ‘blue’ shift of dip wavelength, a decrease in cladding mode loss, and an increase...
A high-sensitivity optical relative humidity (RH) sensor based on the enhanced Goos-Hanchen (GH) shift in a polyimide-coated symmetrical metal cladding waveguide is proposed. The interaction between the diffused water molecules and the polyimide film can lead to a combined change in the thickness and the refractive index, which will give rise to a dramatic change of GH shift. Our optical RH sensor...
Invariable quantity during propagation in nonlinear dispersive fiber is an ideal information carrier. This is eigenvalue of the associated equation of the nonlinear Schrödinger equation. We introduce eigenvalue modulated optical fiber transmission system based on digital coherent technology.
3D micro-devices based on subwavelength-diameter microfibres (MFs) with a strong evanescent field have attracted increasing attention because of the recent rapid development of the so-called wrap-on-a-rod technology. Because they are fabricated from a single-mode fiber with low stiffness and micrometric bending radii, MFs can be wrapped multiple times on a thin microrod (hundreds of micrometers) and...
One of polarization diversity techniques in offset-frequency-spaced two-tone optical coherent detection scheme for radio-over-fiber systems is investigated. A combination of constellations recovered from two orthogonal-polarization components is proposed and the diversity effect is experimentally demonstrated.
A long-haul transmission of 1.28Tb/s quad-subcarrier PM-16QAM based superchannel (5.0bit/s/Hz) employing EDFA only/ EDFA-Raman amplification schemes is reported. Maximum recorded reach is 3,000km/ 2,050km and 3,350km/2,250km without and with DBP for LAPSCF/ SSMF, respectively.
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.