Results 271 to 280 of about 137,045 (307)

Tunable plasmonic color filter

Frontiers in Optics / Laser Science, 2020
Dynamic spectral tunability is a key feature for plasmonic color filter. We numerically investigate the tuning of resonance wavelength of gold-based plasmonic structure exploiting the electrochromism of tungsten trioxide.
Rosanna Mastria, Karl Jonas Riisnaes, Monica Craciun, Saverio Russo   +3 more
openaire   +1 more source

Voltage tunable bandpass filter

2015 Signal Processing Symposium (SPSympo), 2015
A voltage tunable bandpass filter is presented. The filter is realized in microstrip technology using two stepped-impedance resonators. The voltage tuning is provided by means of varactor diodes. The filter has fixed absolute bandwidth of 30 MHz in the frequency range from 375 MHz to 915 MHz. The insertion loss is lower than 5 dB and return loss better
Arkadiusz Golaszewski, Adam Abramowicz
openaire   +1 more source

Niobium Tunable Microwave Filter

IEEE Transactions on Microwave Theory and Techniques, 2009
A superconductor bandpass filter with tunable central frequency in the range of 2-3.5 GHz has been implemented using superconducting quantum interference devices (SQUIDs). The filter is designed using two pi-network resonators connected by a transmission line. Both resonators have a SQUID inductor with a tuning range of 65-200 pH, controlled by current
R. Rafique, T. Ohki, P. Linner, A.Y. Herr   +3 more
openaire   +1 more source

Tunable thin film filters

OFC 2003 Optical Fiber Communications Conference, 2003., 2003
We report widely tunable thin film filters, including both single-cavity and multicavity designs, based on thermo-optic effects in thin films of amorphous semiconductors deposited by PECVD. Applications include an optical channel monitor packaged in a TO can.
L. Domash, E. Ma, N. Nemchuk, A. Payne, M. Wu   +4 more
openaire   +1 more source

Tunable Holographic Wavelength Filter

Spatial Light Modulators and Applications, 1995
The high available bandwidth of optical fibres has led to a large interest in wavelength division-multiplexed (WDM) networks. Such systems rely on the functionality provided by tunable sources, receivers and filters. Components must be quickly tunable over a large range, have a narrow-band channel response, low insertion loss and be robust and ...
M.C. Parker, S.T. Warr, R.J. Mears, W.A. Crossland   +3 more
openaire   +1 more source

Acousto-Optic Tunable Filter*

Journal of the Optical Society of America, 1969
Electronically tunable lithium niobate optical filter utilizing collinear acousto-optic diffraction in anisotropic ...
S. E. Harris, R. W. Wallace
openaire   +1 more source

Towards tunable optical filters

Optical Interference Coatings, 2001
We are focused on thin film filters with active layers for tunable applications. These layers present an electro-optic or piezo-electric effect. We study the influence of materials, substrates, and deposition conditions on these effects.
Remy Parmentier, F. Lemarchand, M. Cathelinaud, G. Albrand, M. Lequime, C. Amra, S. Labat, S. Bozzo, F. Bocquet, O. Thomas, C. Dominici, A. Charaï   +11 more
openaire   +1 more source

Tunable Filters

2021
Joss Bland-Hawthorn, Gerald Cecil
openaire   +1 more source

Monolithic tunable notch filter

1981 IEEE International Solid-State Circuits Conference. Digest of Technical Papers, 1981
A MONOLITHIC SECOND-ORDER state variable filter has been realized using a standard bipolar technology. It is a continuous time filter configured to provide notch, bandpass and lowpass functions, and is tuneable over three decades of frequency by the ratio of two external dc voltages.
openaire   +1 more source

ACOUSTO-OPTIC TUNABLE FILTERS

Optics and Photonics News, 1997
Acousto-optic tunable filters are powerful tools for spectroscopy, imaging, and WDM. Gupta traces the development of these devices and discusses current and future applications.
openaire   +1 more source