Results 31 to 40 of about 25,049 (217)
IEEE Photonics Journal, 2017 A high-resolution electrical method is proposed for magnitude-frequency response measurement of optical filters based on fixed-low-frequency heterodyne detection.
Xinhai Zou +7 more
doaj +1 more source
Drones, 2023 Future wireless communications have been envisaged to benefit from integrating drones and free space optical (FSO) communications, which would provide links with line-of-sight propagation and large communication capacity.
Bing Shen +4 more
doaj +1 more source
Unified Performance Analysis of Mixed Line of Sight RF-FSO Fixed Gain Dual-Hop Transmission Systems [PDF]
, 2014 In this work, we carry out a unified performance analysis of a dual-hop fixed gain relay system over asymmetric links composed of both radio-frequency (RF) and unified free-space optics (FSO) under the effect of pointing errors. The RF link is modeled by
Alouini, Mohamed-Slim +2 more
core +2 more sources
Frequency comb-based multidimensional coherent spectroscopy [PDF]
EPJ Web of Conferences, 2019 We present multidimensional coherent spectroscopy that utilizes frequency combs and multi-heterodyne detection. We demonstrate its capability to measure collective hyperfine resonances in atomic vapor induced by long-range dipole-dipole interactions.
Steven T. Cundiff, Lomsadze Bachana
doaj +1 more source
Multiphoton optical heterodyne detection [PDF]
IEEE Journal of Quantum Electronics, 1975 After reviewing recent work on multiphoton direct detection and single-photon heterodyne detection, we examine the behavior of a multiphoton absorption heterodyne receiver. Expressions are obtained for the detector response, signal-to-noise ratio (SNR), and minimum detectable power for a number of cases of interest.
openaire +1 more source
Comparison of Different Linewidth Measuring Methods for Narrow Linewidth Laser
Sensors, 2022 We experimentally demonstrate a fiber laser with different linewidths based on self-injection locking (SIL) and the stimulated Brillouin scattering effect.
Ziqi Zheng +9 more
doaj +1 more source
Deterministic preparation of superpositions of vacuum plus one photon by adaptive homodyne detection: experimental considerations [PDF]
, 2014 The preparation stage of optical qubits is an essential task in all the experimental setups employed for the test and demonstration of Quantum Optics principles.
Huntington, Elanor H. +2 more
core +2 more sources
Advanced Materials, EarlyView.Interferometric second‐harmonic generation (SHG) imaging reveals the ubiquitous formation of antiparallel domains in CVD‐grown 2D hexagonal boron nitride. By resolving lattice orientation and SHG phase, hidden domain structures and disorder become visible over large areas. The SHG intensity quantitatively tracks crystalline quality across growth routes,
Yeri Lee +12 more
wiley +1 more source
Ultrafast exciton dephasing in PbS colloidal quantum dots [PDF]
, 2011 In this work, we have measured the ground state excitonic dephasing in PbS QDs of sizes from 3.7nm to 5.7nm diameter in the temperature range from 5K to 100K by transient degenerate four-wave mixing (FWM) using 100fs pulses.
Borri, Paola +4 more
core +1 more source
Microwave Absorption for Detection of Dirac Fermions in SnTe Films
Advanced Materials Interfaces, EarlyView.Microwave absorption can detect Dirac fermions in samples exposed to the atmosphere. Results showed that although topological surface states are robust against environmental degradation, they are not detectable by electrical transport measurements. Hence, microwave absorption can detect Dirac fermions even in samples whose surfaces have deteriorated ...
Wellington P. do Prado +8 more
wiley +1 more source