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 17 of 17 for “"EDFA"”.
-
New techniques for multiple wavelength fiber laser generation based on edfa and tdfa
… either based on erbium doped fiber amplifier (EDFA) or thulium doped fiber amplifier (TDFA). The first study is related to a numerical analysis of Brillouin erbium fiber laser (BEFL). In this study, the elements of EDFA and stimulated Brillouin scattering (SBS) effect are thoroughly …
-
Memristor Based Gain-Varying PI Control for Erbium-Doped Fiber Amplifiers (EDFAs)
… the focus is on Erbium-Doped Fiber Amplifiers (EDFAs), crucial components in optical communication systems. Traditional control systems face challenges in control complexity and cost-effectiveness. This research addresses this challenge by introducing a novel approach—incorporating …
-
Practical performance and system capacity of lightwave AM SCM video systems
… systems employing erbium-doped fiber amplifiers (EDFA) operating on the 1300 nm single-mode-fiber of telephone networks, there are additional sources of nonlinear distortion and noise to be considered. The nonlinear distortion produced by laser-chirp and fiber-induced-dispersion and the noise …
-
The effects of noise in CATV distribution networks with star couplers and fiber amplifiers
… length of the erbium-doped fiber amplifier (EDFA) and there is also an optimal position where the EDFA is located between the two star couplers. The modeling is based on an extensive analysis of noise and distortion in the system. A discrepancy in the power behavior of laser relative …
-
Gain and Noise Performance of Bi/Er Co-Doped Fibre Amplifiers
… fibre amplifier is Erbium doped fibre amplifier (EDFA), which covers 1520- 1620nm. To satisfy the increasing demands for other bands, some researches recently study the Bismuth doped fibre amplifier (BDFA), which covers 1150-1550nm. In this thesis, a new fibre amplifier, Bi/Er co-doped fibre …
-
Remote temperature sensing with low-threshold-power using erbium-doped fiber laser
… remote sensing and erbium-doped fiber amplifier (EDFA) as the gain medium. The EDFA is used because it can operate using low pump power owing to the high gain efficiency of the doped-fibers. Based on this proposed design, experimental results indicate that it has a low threshold pump power of only …
-
Characterization and comparison of optical source relative intensity noise and effects in optical coherence tomography
… 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 time-domain OCT …
-
An analysis of cross grain saturation effects in systems of cascaded erbium-doped fiber amplifiers
… composition of the erbium-doped fiber amplifier (EDFA) and its importance to optical networking and a discussion of the technique of wavelength division multiplexing (WDM). The chapter closes with a statement of the problem to be addressed in this thesis. Chapter 2 provides background in relating …
-
Nonlinear optics for frequency-doubling in nanosatellite laser communication
… to carry a second seed laser, modulator, and EDFA (200 g). This improvement is largely driven by the reduction in beamwidth that comes with the higher frequency, and is not substantially greater than the improvement that comes with using the same narrower beamwidth at 1550 nm, although SHG …
-
Analysis and optimisation of the performance of nonlinear optical communication systems
… compensation using Raman and hybrid Raman-EDFA amplification. Moreover, we showed, using nonlinearity management considerations, that the optimal performance in high bit-rate dispersion managed fibre systems with hybrid amplification is achieved for a certain amplifier spacing – which is …
-
Detailed study of Er:YAG-derived optical fiber
… and shorter amplifier lengths. A three-stage EDFA was configured for efficiency and SBS measurements. Amplifier efficiency results were consistent with lifetime results with respect to erbium concentration. A maximum efficiency of 32.7% was observed in the 1% Er:YAG fiber and minimum …
-
Development of "Core-Suction" Technique for Fabrication of Highly Doped Fibers for Optical Amplification and Characterization of Optical Fibers for Raman Amplification
… microprobe. Erbium doped fiber amplifiers (EDFAs) were setup using 30 cm, 5cm and 1 cm lengths of fabricated erbium doped fibers and their gain spectra measured. The distributed gain spectrum for an EDFA was also measured using an optical frequency domain reflectometery (OFDR) technique. …
-
The impact of brillouin pump pre-amplification on multiwavelength brillouin-erbium fiber laser in linear cavity
… of Brillouin and Erbium-Doped Fiber Amplifier (EDFA) gain in the laser cavity. Recent developments of multiwavelength BEFL utilize virtual mirrors in their configuration and most of them amplify the Brillouin pump (BP) once before it oscillates in the laser cavity. Therefore, curiosity now …
-
Network management and control of flow-switched optical networks : joint architecture design and analysis of control plane and data plane with physical-layer impairments
… impairments, we developed models for quality of EDFA-amplified optical links and impairment-aware scheduling algorithms for two cases, a) the known worst case of channel quality is when there is no "On" channel in a fiber, and b) detailed channel configuration of a fiber is needed to determine …
-
Silicon nanocrystals: from bio-imager to erbium sensitizer
… realizable in standard erbium amplifiers used in EDFA for telecom applications. To that end, novel opto-electronic structures were proposed, modeled and manufactured and preliminary results of their performance were presented. The sensitization mechanism between silicon nanoparticles and erbium …
-
High Speed Fiber Optic Spectrometer
… analysis, the erbium-doped fiber amplifier (EDFA) is determined to be the dominant noise source. But by using two EDFAs, the overall signal to noise ratio is improved by 9.2 dB. The preliminary experimental results for FP sensor and FBG sensor signal demodulation are presented. The HSFOS for …
-
Optické koherentní přenosové systémy
Tato bakalářská práce se věnuje možnostem koherentních optických sítí. Popisuje prvky koherentní sítě. Praktická část se zabývá simulací koherentní optické sítě s využitím PM-QPSK a PM-16QAM modulace pro šířku pásma 112 Gbit/s a 224 Gbit/s