نتایج جستجو برای: optical filters
تعداد نتایج: 307627 فیلتر نتایج به سال:
By developing the terahertz (THz) technology, in addition to generators and detectors of THz waves, the existence of some tools such as modulators and filters are needed. THz filters are important tools for various applications in the field of chemical and biological sensors. Linear and nonlinear optical properties of the graphene have attracted lots of attention. In fact graphene exhibits vari...
A new technique for obtaining frequency-dependent magnitude and phase information across an optical channel is presented using tunable allpass optical filters and a detector with a small bandwidth relative to the full channel width. This technique has application to optical monitoring of intersymbol interference distortions, including chromatic and polarization-mode dispersion effects, and thus...
A key device in all-optical networks is the optical filter. Ring resonator filters on the basis of GaInAsP / InP with improved filter response and increased functionality using integrated semiconductor optical amplifiers are presented. 2003 Optical Society of America OCIS codes: (130.3120) Integrated optics devices, (230.5750) Resonators
We present an optical waveguide technology for low-loss, compact and tunable planar integrated optical devices. Examples of devices realized in this technology include finite and infinite impulse response (FIR and IIR) filters and optical switches. © 1999 Optical Society of America OCIS codes: (130.3120) Integrated optics devices, (130.3130) Integrated optics materials
We utilize a recently developed optical imaging method based on Fourier processing with Gabor-like filters to detect changes in light scattering resulting from alterations in mitochondrial structure in endothelial cells undergoing apoptosis. Imaging based on Gabor filters shows a significant decrease in the orientation of subcellular organelles at 60 to 100 minutes following apoptosis induction...
This paper presents an overview of integrated optical signal routing based on the principle of electro-optic effects. There are some specific types of materials whose refractive index changes due to the application of the electric field. Lithium-niobate (LiNbO 3) and gallium arsenide are some important electro-optic materials. Due to the application of the voltage across electrode present in on...
Regenerated Fibre Bragg Gratings have the potential for high-temperature monitoring. In this paper, the inscription of Fibre Bragg Gratings (FBGs) and the later regeneration process to obtain Regenerated Fiber Bragg Gratings (RFBGs) in high-birefringence optical fiber is reported. The obtained RFBGs show two Bragg resonances corresponding to the slow and fast axis that are characterized in temp...
This paper presents a new approach to maximize the dispersion-limited distance of vertical cavity surface emitting lasers (VCSELs) operating at 1550. 127 nm with 10 Gb/s bit rate. Optical non return to zero (NRZ) signal is generated by using an optical band pass filter (OBPF) along with Mach-Zehnder interferometer (MZI) at the output of VCSEL. A third order super-Gaussian and fourth order Butte...
In this paper, we describe optical component and device technologies we have developed for next-generation photonic networks that achieve high tunability, high-speed transmission, and low power consumption. These include three-dimensional optical MEMS switches, acousto-opic tunable filters (AOTFs), lithium niobate optical modula-tors, and semiconductor lasers and optical amplifiers.
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