Now showing items 1-10 of 646
Synthesis of Optical Filters Using Sagnac Interferometer in Ring Resonator
We propose a new synthesis method for the implementation of infinite impulse response filters, using a Sagnac interferometer within a ring resonator. This structure permits the synthesis of second-order optical functions ...
Comparison of phase recovery methods in spiral speckle pattern interferometry correlation fringes
Spiral interferometry can be used as a solution to the problem of sign ambiguity presented in the conventional speckle pattern interferometric technique when the optical phase needs to be reconstructed from a single closed ...
Novel tunable optical filter employing a fiber loop mirror for synthesis applications in WDM
A novel optical filter employing a fiber loop mirror within an amplified ring resonator is presented. The fiber loop mirror allows tuning by changing the coupling factor of a coupler. The device can be used as a building ...
Thermo-optical Properties of Nanofluids
(El Springer, 2013)
Ultrashort laser pulse retrieval using single-shot VAMPIRE
Characterizing ultrashort laser pulses is a challenging task. By now several methods are established which can be divided into interferometric methods like SPIDER (spectral phase interferometry for direct electric field ...
Dynamic Detection of Thicknesses in Polymer Deformation Based on the Optical Coherence Interferometry Technique
(Bentham Science Publishers, 2015-07)
We describe the implementation of the optical coherence interferometry (OCT) technique in the dynamic measurement of the deformation of polymers. The experimental set-up of the interferometer system and the signal processing ...
On the design of silicon Mach-Zehnder interferometers for the C-band
(Institute of Electrical and Electronics Engineers Inc., 2019)
A silicon Mach-Zehnder interferometer is designed, fabricated and experimentally demonstrated for the C-band. Several interferometers were designed with different free spectral ranges. The influence of the waveguide width ...
Digital control system for two-beam optical interferometry using variable structure and sliding modes method
Laser interferometry is recognized as an extremely sensitive measurement technique, capable of detecting quantities that conventional sensors usually cannot. However, such advantage also brings a challenge, the interferometer ...
Low energy X-ray grating interferometry at the Brazilian Synchrotron
Grating based X-ray differential phase contrast imaging has found a large variety of applications in the last decade. Different types of samples call for different imaging energies, and efforts have been made to establish ...