Results 41 to 50 of about 137,852 (257)
Taurus Tunable Filter -- seven years of observing
, 2003 The Taurus Tunable Filter (TTF) has now been in regular use for seven years on the Anglo-Australian Telescope. The instrument was also used for three years (1996--1999) on the William Herschel Telescope.
Bland-Hawthorn +35 more
core +2 more sources
Continuously Tunable Microwave Photonic Notch Filter With a Complex Coefficient
IEEE Photonics Journal, 2011 This paper presents a continuously tunable microwave photonic notch filter with a complex coefficient. The complex coefficient is generated using a radio-frequency (RF) phase shifter that consists of a dual-parallel Mach-Zehnder modulator (DPMZM) and a ...
Wei Li, Ning Hua Zhu, Li Xian Wang
doaj +1 more source
Curvature induced magnonic crystal in nanowires [PDF]
, 2019 A new type of magnonic crystals, curvature induced ones, is realized in ferromagnetic nanowires with periodically deformed shape. A magnon band structure of such crystal is fully determined by its curvature: the developed theory is well confirmed by ...
Brink, Jeroen van den +5 more
core +2 more sources
IEEE Photonics Journal, 2019 We report continuously tunable and bandwidth variable optical notch and band-pass filters created by combining four left- and right-handed circular cholesteric liquid crystal cells without extra optical components. Filter performance was greatly improved
Mi-Yun Jeong, Keumcheol Kwak
doaj +1 more source
Proposed acousto-optic filter [PDF]
, 1969 Narrow band optical filter is electronically tunable over a large wavelength region.
Harris, S. E.
core +1 more source
Dual-Band Tunable Recursive Active Filter
, 2011 This letter presents a novel recursive active filter topology that provides dual-band performance, with independent tuning capability in both bands. The dual-band operation is achieved by using two independent feedback lines.
Aznar Ballesta, Francisco +3 more
core +1 more source
FEBS Open Bio, EarlyView.Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley +1 more source
Control of broad-area vertical-cavity surface emitting laser emission by optically induced photonic crystals [PDF]
, 2008 We control the emission properties of a broad-area vertical-cavity surface emitting laser by coupling it to an external feedback cavity containing a photorefractive crystal with an optically induced photonic lattice.
Ackemann, T. +4 more
core +1 more source
Handbook of Establishing and Maintaining Oxygen‐Free Atmospheres
Advanced Engineering Materials, EarlyView.This study presents a practical framework for creating oxygen‐free atmospheres at ambient pressure using silane‐doped inert gases. The results show that ultra‐low oxygen levels and strongly reduced water content can be achieved through controlled silane dosing, drying systems, and sensor monitoring.
Sascha Jan Zimmermann +3 more
wiley +1 more source
Frequency tunability of solid-core photonic crystal fibers filled with nanoparticle-doped liquid crystals [PDF]
, 2009 We infiltrate liquid crystals doped with BaTiO3 nanoparticles in a photonic crystal fiber and compare the measured transmission spectrum with the one achieved without dopant.
Alkeskjold +34 more
core +3 more sources