Results 41 to 50 of about 12,188 (279)
Coherent ONU based on 850 µm-long cavity-RSOA for next-generation ultra-dense access network [PDF]
, 2016 In this Letter, an efficient bidirectional differential phase-shift keying (DPSK)-DPSK transmission for a ultradense wavelength division-multiplexed passive optical network is proposed. A single distributed feedback laser at the optical network unit (ONU)
Cano Valadez, Iván Nicolás +4 more
core +2 more sources
Ultra-low-reflectivity semiconductor optical amplifiers without antireflection coatings
Electronics Letters, 1990 High-performance, tilted stripe ridge waveguide semiconductor optical amplifiers which require no antireflection coating to achieve reflectivities of less than −40 dB are demonstrated. This very low reflectivity is found to be both largely independent of polarisation and wavelength, and also easily reproducible from wafer to wafer.
W. Rideout +4 more
openaire +1 more source
Applied Sciences, 2017 We present a comparative study of the capacity increase brought by bit- and power-loading discrete multi-tone (DMT) modulation for low-cost colorless transmitters.
Simon Arega Gebrewold +4 more
doaj +1 more source
IEEE Access, 2019 For the first time up to our knowledge, a centralized-light-source two-way eight-level pulse amplitude modulation (PAM8)/four-level pulse amplitude modulation (PAM4) free-space optical (FSO) communication with parallel optical injection-locked vertical ...
Wen-Shing Tsai +4 more
doaj +1 more source
Thermoreflectance Detection of Point Defects Resulting from Focused Ion Beam Milling
Advanced Engineering Materials, EarlyView.Focused ion beam (FIB) milling is a common tool for nanoscale material processing, however irradiation damage, redeposition, and contamination can occur. We use several characterization tools to show FIB‐induced effects beyond 1 mm from the milled area.
Thomas W. Pfeifer +3 more
wiley +1 more source
Optically Integrated InP–Si$_3$ N$_4$ Hybrid Laser
IEEE Photonics Journal, 2016 We describe the first demonstration and characterization of an optically integrated InP–Si $_3$N$_4$ hybrid laser. The laser is formed by integration of an InP-based reflective semiconductor optical amplifier with a Si$_3$N $_4$ based feedback ...
Youwen Fan +8 more
doaj +1 more source
Planar Solid‐State Nanopores Toward Scalable Nanofluidic Integration Based on CMOS Technology
Advanced Engineering Materials, EarlyView.We present a scalable silicon‐based fabrication strategy for planar solid‐state nanopores to enable their integration with complex nanofluidic systems. Prototype devices demonstrate normal voltage‐current characteristics, good noise performance, and appreciable streaming currents. Our CMOS‐compatible fabrication process offers precise geometric control
Ngan Hoang Pham +7 more
wiley +1 more source
Energy-efficiency improvements for optical access [PDF]
, 2014 This article discusses novel approaches to improve energy efficiency of different optical access technologies, including time division multiplexing passive optical network (TDM-PON), time and wavelength division multiplexing PON (TWDM-PON), point-to ...
Anthapadmanabhan, P +8 more
core +1 more source
Advanced Engineering Materials, EarlyView.ZnS‐MXene‐TiO2 nanocomposite heterojunction for photocatalytic decomposition of this methylene blue dye (MB) greatly improves light absorption, charge separation, and active site area. Two‐dimensional MXene forms nanocomposites by easily combining them with 0D (quantum dots), 1D (tube and wire), 2D (plane and sheet), and 3D (particle and lamellar ...
Latiful Kabir +7 more
wiley +1 more source
Applied Sciences, 2015 Reflective semiconductor optical amplifier fiber cavity lasers (RSOA-FCLs) are appealing, colorless, self-seeded, self-tuning and cost-efficient upstream transmitters. They are of interest for wavelength division multiplexed passive optical networks (WDM-
Simon A. Gebrewold +13 more
doaj +1 more source