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Tunable Room Temperature Thz Sources Based On Nonlinear Mixing In A Hybrid Optical And Thz Micro-Ring Resonator, Raju Sinha, Mustafa Karabiyik, Chowdhury Al-Amin, Phani Kiran Vabbina, Durdu O. Guney, Nezih Pala
Tunable Room Temperature Thz Sources Based On Nonlinear Mixing In A Hybrid Optical And Thz Micro-Ring Resonator, Raju Sinha, Mustafa Karabiyik, Chowdhury Al-Amin, Phani Kiran Vabbina, Durdu O. Guney, Nezih Pala
Open Access Publishing Fund
We propose and systematically investigate a novel tunable, compact room temperature terahertz (THz) source based on difference frequency generation in a hybrid optical and THz micro-ring resonator. We describe detailed design steps of the source capable of generating THz wave in 0.5–10 THz with a tunability resolution of 0.05 THz by using high second order optical susceptibility (x(2)) in crystals and polymers. In order to enhance THz generation compared to bulk nonlinear material, we employ a nonlinear optical micro-ring resonator with high-Q resonant modes for infrared input waves. Another ring oscillator with the same outer radius underneath the nonlinear ring …
Microwave Photonic Filter Using Multiwavelength Brillouin-Erbium Fiber Laser
Microwave Photonic Filter Using Multiwavelength Brillouin-Erbium Fiber Laser
Faculty of Engineering University of Malaya
A microwave photonic filter based on multiwavelength Brillouin-erbium fiber laser (BEFL) is proposed and experimentally demonstrated. By precisely controlling the output channels of the BEFL, the 3-dB bandwidth of the filter spectrum can be adjusted at a resolution of similar to 24 MHz. The free spectral range of the filter can be tuned by changing the Brillouin gain fiber of the BEFL in addition to changing the length of the dispersion fiber, which adds flexibility to the filter system. Link to Full-Text Articles : http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6918403&tag=1
Two-Photon Absorption In Bulk Semiconductors And Quantum Well Structures And Its Applications, Himansu Pattanaik
Two-Photon Absorption In Bulk Semiconductors And Quantum Well Structures And Its Applications, Himansu Pattanaik
Electronic Theses and Dissertations
The purpose of this dissertation is to provide a study and possible applications of two-photon absorption (2PA), in direct-gap semiconductors and quantum-well (QW) semiconductor structures. One application uses extremely nondegenerate (END) 2PA, for mid-infrared (mid-IR) detection in uncooled semiconductors. The use of END, where the two photons have very different energies gives strong enhancement comapared to degenerate 2PA. This END-2PA enhanced detection is also applied to mid-IR imaging and light detection and ranging (LIDAR) in uncooled direct-gap photodiodes. A theoretical study of degenerate 2PA (D-2PA) in quantum wells, QWs, is presented, along with a new theory of ND 2PA in …
White Light Continuum For Broadband Nonlinear Spectroscopy, Trenton Ensley
White Light Continuum For Broadband Nonlinear Spectroscopy, Trenton Ensley
Electronic Theses and Dissertations
Supercontinuum (SC) generation, oftentimes referred to as white-light continuum (WLC), has been a subject of interest for more than 40 years. From the first observation of WLC in condensed media in the early 1970s to the first observation of WLC in gases in the mid-1980s, much work has been devoted to developing a framework for understanding the complex nature of this phenomenon as well as discovering its utility in various applications. The main effort of this dissertation is to develop a WLC for the purpose of broadband nonlinear spectroscopy and use it in spectroscopic measurements. The ability to generate a …