Results 231 to 240 of about 82,242 (274)

Light filtering devices using background wavelength processing techniques

MRS Proceedings, 2012
ABSTRACTThis paper reports on light filtering devices based on a-SiC:H tandem pi´n/pin heterostructures. The spectral sensitivity is analyzed. Steady state optical bias with different wavelengths, are applied from each front and back sides and the photocurrent is measured. Results show that it is possible to control the sensitivity of the device and to
M. A. Vieira, M. Vieira, P. Louro, V. Silva, A. S. Garção   +4 more
openaire   +1 more source

Multi-wavelength filters in silicon using superposition sidewall Bragg grating devices

Optics Letters, 2014
Multiple-filter stopbands, with the potential to be nonuniformly spaced in frequency, are realized in a single integrated Bragg grating device on silicon. By utilizing a superposition of sidewall relief grating functions, N individual filter responses can be fabricated with a device length N× shorter than the equivalent serial set of gratings ...
Strain, Michael John, Thoms, Stephen, Macintyre, Douglas S., Sorel, Marc   +3 more
openaire   +4 more sources

NCF–GIMF device as SA and filter utilized in tunable single- and dual-wavelength Yb-doped mode-locked fiber laser

Optics Communications, 2021
Abstract In this letter, by incorporating hybrid structure of no-core fiber (NCF)-graded index multimode fiber (GIMF) as the saturable absorber (SA) and spectral filter simultaneously, not only the switchable noise-like pulses (NLPs) but also the tunable single- and dual-wavelength dissipative solitons (DSs) are obtained from a net normal dispersion ...
Shuo Chang, Zhaokun Wang, D.N. Wang, Wendi Wu, Feng Gao   +4 more
openaire   +1 more source

Wavelength filtering and demultiplexing devices based on ultrathin corrugated MIM waveguides

Journal of Modern Optics, 2015
We have numerically investigated the transmission properties of spoof surface plasmon polaritons on the ultrathin corrugated metal–insulator–metal (MIM) waveguides with different grooves. A band-pass plasmonic filter with T-shaped grooves and a compact 4-way wavelength division demultiplexing (WDM) incorporating the filter have been proposed. The whole
Bao Jia Yang, Yong Jin Zhou
openaire   +1 more source

A multipurpose WDM holographic device for filtering, wavelength multiplexing and routing applications

Photonic Network Communications, 2006
This work describes the theory, design, and experimental results of a generic multipurpose device that can operate as a tunable wavelength filter, wavelength multiplexer and wavelength router. This device could be especially useful in optical networks applications based in both Coarse and Dense Wavelength Division Multiplexing technology (CWDM/DWDM ...
Alfredo Martín Minguez, Paloma R. Horche   +1 more
openaire   +1 more source

A widely tunable dual-wavelength based on a microring resonator filter device

Laser Physics, 2018
We demonstrate a stable, tunable dual-wavelength (DW) generated by launching an in-house built supercontinuum (SC) into an add-drop microring resonator (MRR). The MRR is fabricated from a silicon–nitrogen–oxygen substrate. The frequency comb of the filtered SC is obtained with an experimental free spectral range (FSR) from 0.39 to 0.46 nm corresponding
Amiri, Iraj Sadegh, Ariannejad, Mohammad Mahdi, Tiu, Zian Cheak, Ooi, Shok Ing, Aidit, Siti Nabila, Alizadeh, Farideh, Yupapin, Preecha Promphan   +6 more
openaire   +2 more sources

Broadband Wavelength Filter Device using a Sidewall Grating in Multimode SOI Rib Waveguide

Optical Fiber Communication Conference, 2017
A filter device with a flat-top passband of Δλ pb > 40 nm is demonstrated using multi-mode SOI waveguide with a side-wall grating. The passband is bounded by highly extinguished sidebands of Δλ sb > 10 nm.
Parimal Sah, Bijoy Krishna Das
openaire   +1 more source

Filter switching device for dual-wavelength videoimaging

Journal of Fluorescence, 1996
An inexpensive, dual-wavelength, videoimaging system that can be used for parallel observation of two fluorescent dyes is described. All four filters, two for excitation and two for emission, are placed on the same oscillating holder. Filters are coupled with a single dichroic mirror having two spectral windows.
openaire   +2 more sources

Development of wavelength selective shutters for device application for filters and smart windows

IEE Proceedings - Circuits, Devices and Systems, 1997
Ideal wavelength selective shutters (or filters) need to have sharp, high intensity, easily switchable absorption bands in the desired region of the electromagnetic spectrum. If such devices are to be used for smart window applications, then selective control of all the visible and near infra-red regions of the electromagnetic spectrum would be ...
J. Silver, M.T. Ahmet, J. Billingham, J.G.F. Littler   +3 more
openaire   +1 more source

Optical wavelength converter with a dynamic Brillouin filter and an electronic compensating device

Journal of the Optical Society of America B, 2006
We present an experimental and theoretical study of a highly robust wavelength converter at 10Gbit/s that is based on a narrow bandstop Brillouin filter. The wavelength conversion takes place in a semiconductor optical amplifier in a cross-gain-phase process, which operates in a weak-modulation mode.
Er'el Granot, Shmuel Sternklar, Shalva Ben-Ezra, Haim Chayet, Nir Shahar, Sagie Tsadka   +5 more
openaire   +1 more source