Results 91 to 100 of about 42,863 (289)
Retrieval of phase relation and emission profile of quantum cascade laser frequency combs
, 2019 The major development recently undergone by quantum cascade lasers has effectively extended frequency comb emission to longer-wavelength spectral regions, i.e. the mid and far infrared.
Bartalini, Saverio +14 more
core +1 more source
Two‐Dimensional Reconfigurable Photodiode for In‐Sensor Color Filtering and Spectral Logic
Advanced Materials, EarlyView.By harnessing the photodoping of different aggregates, the device exhibits wavelength‐dependent volatile‐to‐nonvolatile photoresponses that can be reconfigured via bias modulation. This enables in‐sensor color filtering and spectral‐encrypted information processing, eliminating reliance on external optical filters or post‐processing algorithms ...
Xiaokun Guo +7 more
wiley +1 more source
Modeling of
IEEE Photonics Journal, 2013 A numerical study of As2S3 Raman fiber lasers is carried out to show their potential for the entire coverage of the 3-4-μm spectral band. Experimental results are first obtained from such a laser operated under controlled conditions in order to ...
Vincent Fortin +4 more
doaj +1 more source
Dysprosium-doped ZBLAN fiber laser tunable from 2.8 {\mu}m to 3.4 {\mu}m, pumped at 1.7 {\mu}m
, 2018 We demonstrate a mid-infrared dysprosium-doped fluoride fiber laser with a continuously tunable output range of 573 nm, pumped by a 1.7 {\mu}m Raman fiber laser. To the best of our knowledge, this represents the largest tuning range achieved to date from
Jackson, S. D. +2 more
core +1 more source
Advanced Materials Interfaces, EarlyView.This study investigates thermally CVD‐deposited AlN/TiAlN dual‐layer coatings over a Si substrate, focusing on the temperature‐dependent process‐structure relationship. Systematic characterization reveals that a dense AlN interlayer combined with an optimally deposited TiAlN top layer provides enhancement in mechanical strength, tribological stability,
Soham Das +4 more
wiley +1 more source
High Power Laser Science and EngineeringWe present a high-power mid-infrared single-frequency pulsed fiber laser (SFPFL) with a tunable wavelength range from 2712.3 to 2793.2 nm. The single-frequency operation is achieved through a compound cavity design that incorporates a germanium etalon ...
Zongxiao Fan +6 more
doaj +1 more source
Active mode locking of quantum cascade lasers in an external ring cavity
Nature Communications, 2016 Compact, integrated mode-locked lasers can produce ultrashort pulses of light in the visible and near infrared, but are more difficult to achieve in the mid-infrared. Here, the authors demonstrate active mode locking of an external-cavity quantum cascade
D. G. Revin +4 more
doaj +1 more source
Advanced Materials Technologies, EarlyView.Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu +8 more
wiley +1 more source
Atmospheric studies and applications with infrared heterodyne detection techniques [PDF]
With the advent of stable, cw infrared lasers with moderate output power capabilities in the mid 1960's came the idea of using heterodyne detection, a mature radio frequency technique, in the infrared.
Menzies, R. T.
core +1 more source
Optofluidic Raman Analysis and Capacity Recovery in Li‐ion Cells
Advanced Materials Technologies, EarlyView.Operando Raman spectroscopy is used to monitor the degradation of commercial Li‐ion cells. Using a microfluidic access port, small amounts of electrolyte are sampled into a hollow‐core optical fibre, where fibre‐enhanced Raman analysis reveals Li+ solvation changes and solvent evolution.
Ermanno Miele +9 more
wiley +1 more source