Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 28 for “"parametric amplifier"”.
-
Performance of multichannel fiber optic parametric amplifier
… the key components in DWDM system is an optical amplifier. Fiber optical parametric amplifier (FOPA) can be used for several signal processing application including optical amplification, phase conjugate and wavelength conversion. FOPA operate based on a fiber nonlinearity known as four wave …
-
The dynamic range of a parametric amplifier
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering, 1962.
-
High-efficiency, low-loss Floquet Josephson Traveling Wave Parametric Amplifier
… fundamental science necessitates quantum-limited amplifiers with near-ideal quantum efficiency and multiplexing capability. However, existing solutions achieve one at the expense of the other; for example, Josephson traveling wave parametric amplifiers (JTWPAs) are highgain, broadband, and …
-
Performance of four-stage cascaded fiber optical parametric amplifier (FOPA) using optisystem
… the applications in the FWM is a fiber optical parametric amplifier (FOPA). An FOPA has an ability to achieve a high gain and bandwidth. One of the approaches is a cascaded FOPA. A cascaded FOPA is a FOPA with two or more active media, commonly known as a highly nonlinear fiber (HNLF). Previous …
-
Broadband Squeezed Microwaves and Amplification with a Josephson Traveling-Wave Parametric Amplifier
… of highly-squeezed states using superconducting amplifiers is a foundation for quantum optics and quantum metrology in the microwave domain. In superconducting circuits, researchers commonly use cavity-based Josephson amplifiers to generate squeezed microwaves. These narrow-band squeezers use a …
-
Investigation of dual-pump fiber optical parametric amplifier using highly nonlinear dispersion shifted fiber
Using multi-pump Raman amplifier provides high parametric gain over wide bandwidth with low noise figure (NF). Contrary to Raman amplifiers (RA), fiber optical parametric amplifiers (FOPA) can provide high and flat parametric gain over a bandwidth of tens or hundreds of nanometers with low-noise …
-
Impacts of higher-order dispersion coefficients and dispersion fluctuations on one-pump fiber optical parametric amplifier
… optical fiber which is useful for fiber optical parametric amplifiers (FOPA). The performance of FOPA i.e. parametric gain, amplification bandwidth, and saturation power are reliant on the efficiency of the FWM process. The random dispersion fluctuations (
-
Theoretical development and characterisation of a Josephson Traveling Wave Parametric Amplifier for very low power microwave signals
L'abstract è presente nell'allegato / the abstract is in the attachment
-
Time-Variant Components to Improve Bandwidth and Noise Performance of Antennas
… design of low-noise devices (such as antennas, amplifiers, and filters) is essential to increase the communication range. Also, it is well known that the noise performance of a receiving radio is primarily determined by the frontend including the antenna, filter, and a low-noise amplifier. In …
-
ΘΕΩΡΙΑ ΤΩΝ ΠΕΠΙΕΣΜΕΝΩΝ (SQUEEZED) ΚΑΤΑΣΤΑΣΕΩΝ ΚΑΙ ΕΦΑΡΜΟΓΕΣ ΣΤΗΝ ΚΒΑΝΤΙΚΗ ΟΠΤΙΚΗ
… OPERATOR OF THE YUEN TYPE. WE PROVED THAT THE PARAMETRIC AMPLIFIER WHICH IS THE MOST IMPORTANT MODEL FOR THE PRODUCTION OF THE SQUEEZED STATES GIVES YUEN TYPE STATES. THE SAME HOLDS FOR THE TWO-PHOTON LASER. WE DEFINED THE GENERALIZED SQUEEZE OPERATOR PROVING THAT IT IS OF THE YUEN TYPE ANDWE …
-
The Generation and Detection of Squeezed Microwave Photons Realized using Traveling-Wave Parametric Amplifiers
… In circuit quantum electrodynamics, Josephson parametric amplifiers play a crucial role in quantum-limited amplification and squeezed microwave generation. In this thesis, we develop a dual-pump, broadband Josephson traveling-wave parametric amplifier (JTWPA) to demonstrate non-degenerate …
-
Developing a Multi-axis Femtosecond Laser Micromachining Platform for Laser Induced Refractive Index Modification: Fiber Bragg Gratings, Waveguides, and Beyond
… extended to 750 nm and 1260 nm with an Optical Parametric Amplifier. Precise control over FBG pitch and length were achieved, with results showcasing strong refractive index modifications. FBGs exhibited reflectivity’s exceeding 25 dB, and bandwidth of less than 200~pm for 1~mm long second order …
-
Experimental investigation of the dynamics of S1 benzene and the development of a new UV femtosecond pulse shaper
… to shape the output of a commercial optical parametric amplifier in the visible region using a reflective mode, folded, pulse shaping assembly employing a spatial light modulator. Second harmonic generation is used to frequency double the shaped visible pulse down to the deep ultraviolet …
-
Coherent lattice and molecular dynamics in ultrafast single-shot spectroscopy
… pumped dual-beam noncollinear optical parametric amplifier which was developed to provide independently tunable pump and probe beams in the visible and UV regions of the electromagnetic spectrum. The second part of the thesis concerns the application of this technique to the study of …
-
Photoinduced dynamics studied by ultrafast single-shot pump-probe spectroscopy
… a two-stage dual-beam noncollinear optical parametric amplifier to provide tunable sources for pump-probe spectroscopy. Next, the experimental setup of dual-echelon single-shot spectroscopy is illustrated with great detail and possible noise sources and correction methods are explored. Using …
-
Spectroscopic investigations of hydrogen bond dynamics in liquid water
… response. I then designed and built an optical parametric amplifier that produces sub-50 fs pulses of mid-IR light to investigate the intermolecular dynamics of water through their effect on the OH oscillator of HOD in D20. By analyzing the results of three-pulse vibrational echo and …
-
Target detection through quantum illumination
… beams are created through Type-O spontaneous parametric downconversion (SPDC). The signal is attenuated and combined with large levels of noise. The signal is phase modulated to improve the observation by shifting it from DC to 16 kHz. The return signal and idler are recombined in an optical …
-
Low Loss Orientation-Patterned Gallium Arsenide (OPGaAs) Waveguides for Nonlinear Infrared Frequency Conversion
… nonlinear gain was investigated in an optical parametric amplifier (OPA) experiment.
-
Study of an active RC line in the microwave region
… the device makes it capable of being a microwave amplifier or oscillator. The advantage of this type of device is that it does not have to present a negative impedance to an external signal source (as is the case with parametric amplifiers) to accomplish gain. Due to the nature of its design, it …
Page 1 of 2