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 33 for “"Fiber Amplifier"”.
-
Watt-class continuous wave Er3+/Yb3+ fiber amplifier
Rare-earth doped optical fibers can be used to make optical amplifiers in the near infrared with large optical gain in an all fiber based system. Indeed, erbium doped fibers made gain possible within the 1532 to 1560 nm band which makes long span fiber optical communication systems a possibility. …
-
Investigation of single-frequency high-power Raman fiber amplifier for guide star application
… scaling of core-pumped single-frequency Raman fiber amplifiers operating at 1178 nm. A numerical model was developed that accounts for stimulated Raman scattering (SRS) and stimulated Brillouin scattering (SBS) in relation to the fiber mode field diameter, length, seed power, and available pump …
-
Design of a Novel Quadruply-Doped Glass and Fiber Amplifier for Ultra-Wideband Communication
L'abstract è presente nell'allegato / the abstract is in the attachment
-
Analysis and simulation of the Kerr effect in long haul in-line fiber amplifier transmission systems
… submarine cable systems will use in-line fiber amplifiers to replace electrical regenerators. This new approach requires a better understanding of the fiber waveguide, especially the nonlinear characteristics. It has been demonstrated, both by numerical simulation and experiments, that the …
-
STIMULATED BRILLOUIN SCATTERING SUPPRESSION VIA TEMPERATURE GRADIENTS IN FIBER AMPLIFIERS
… polarization maintaining ytterbium doped fiber amplifier is explored. The limiting factor, Stimulated Brillouin Scattering (SBS), is suppressed with a single-step temperature gradient. A similar fiber amplifier to the 177W amplifier is constructed and tested at various temperatures from …
-
Analysis and modeling of phase noise in LOCSET and the AFRL high power fiber test bed
High power ytterbium doped fiber amplifier arrays in a master oscillator-power amplifier configuration and the phase noise in such a system is studied. An effective method of coherently combining the elements in such an array is LOCSET. A potential drawback to the effectiveness in LOCSET is the …
-
Novel approaches to power scaling of single-frequency photonic crystal fiber amplifiers
… ytterbium-doped photonic crystal fiber amplifiers. The objective of this effort is to identify issues which limit power scaling and develop novel techniques to overcome these limitations. Historically, stimulated Brillouin scattering (SBS) has been the primary obstacle in the …
-
High-power deep-UV laser for improved and novel experiments on hydrogen
… and other exotic simple systems. High-power fiber lasers from 1-1.2 µm have flourished as a result of advances in ytterbium(Yb)-doped fiber amplifiers. In addition, high-power Yb-fiber lasers between 975-980 nm have also been developed—a notable accomplishment due to gain competition in the > …
-
A laser system for trapping and cooling of ⁶Li atoms
… of the laser system that makes use of a Raman Fiber Amplifier coupled with a Frequency Doubling Cavity and shows the finalized setup. Finally, the thesis delves into the topic of Modulation Transfer Spectroscopy which was used to lock the laser to the D₂ line transition of ⁶Li and shows the …
-
New techniques for multiple wavelength fiber laser generation based on edfa and tdfa
Multiple wavelength fiber laser (MWFL) can be a potential source for microwave generation as the conventional microwave generator have several issues in generating high frequency. In order to be such source, the MWFL must have the following criterion; a great number of comb lines, a compact design, …
-
CHARACTERIZATION OF DOPED GALLIUM NITRIDE SUBSTRATES
… absorption of all the samples using a UV-NIR fiber spectrometer. Through this procedure it was found that they all showed a strong absorption at 518 nm. Thus, time-resolved differential transmission measurements were conducted at this wavelength using the second harmonic generation (SHG) of a …
-
Characterization and comparison of optical source relative intensity noise and effects in optical coherence tomography
… a super-luminescent diode (SLD), an erbium-doped fiber amplifier (EDFA), multiplexed SLDs, and a continuous wave (cw) laser. A method for the reduction of RIN by amplifying the SLD light output by using a gain-saturated semiconductor optical amplifier (SOA) is reported. Also, measurements using a …
-
The development of high power, pulsed fiber laser systems and their applications
Rare-earth doped silica fibers have been used for many years to create continuous-wave lasers, and Er-doped fiber amplifiers are now widely used in telecommunications. In addition, cladding pumped fiber allows the efficient conversion of multimode radiation from high power, low cost, broad-stripe …
-
Helium resonance fluorescence LiDAR
… output power of the He Li- DAR transmitter using fiber amplifier technology, increase the light gathering power of the receiver, and utilize detectors with higher quantum efficiencies at 1083 nm. A 45 W He resonance fluorescence LiDAR transmitter has been designed and fabricated, and is being …
-
An analysis of cross grain saturation effects in systems of cascaded erbium-doped fiber amplifiers
… of Cross Gain Saturation effects in Erbium Amplifier Cascades. Chapter 1 provides an interesting historical perspective on lightwave communications. This chapter serves as a primer of sorts for understanding the impact of input intensity on amplifier gain, the composition of the erbium-doped …
-
High-power operation of interferometric gravitational-wave detectors
… a high-power, narrow-linewidth ytterbium-doped fiber amplifier for use in future gravitational-wave detectors.
-
Tools for quantum optics : pulsed polarization-maintaining Er-doped fiber laser and spatial mode manipulation in spontaneous parametric downconversion
… one project, a pulsed, mode-locked erbium-doped fiber laser, designed to be used as a seed laser for a 390 nm source, was built using polarization-maintaining components to address polarization drift. The fiber laser operated at a center wavelength of 1560.0 nm with an output power of 1 to 2.5 …
-
Optical and optoelectronic fiber devices
… thermal, and optical properties into a single fiber structure enabled the realization of fiber devices with diverse and complex functionalities. Amongst those, demonstrated first in our work, are the surface-emitting fiber laser, the hollow-core fiber amplifier, the thermally self-monitored …
-
High speed photodiode and 90° optical hybrid for 2 µm optical communication systems
… such as loss and non-linearity of silica-core fibers. The waveband at 2 µm can be recognized as a potential candidate due to the low loss window in Hollow Core Photonic Band Gap Fibers (HCPBGF) and the gain bandwidth from Thulium Doped Fiber Amplifier (TDFA). Furthermore this waveband can take …
-
HIGH POWER PULSED FIBER LASER SOURCES AND THEIR USE IN TERAHERTZ GENERATION
… I report the development of high power pulsed fiber laser systems. These systems utilize phosphate glass fiber for active elements, instead of the industry-standard silica fiber. Because the phosphate glass allows for much higher doping of rare-earth ions than silica fibers, much shorter …
Page 1 of 2