Results 41 to 50 of about 1,780,396 (352)

An all fiber based Talbot self-imaging mirror device for phase-locking of a multi-fiber laser [PDF]

Journal of the European Optical Society-Rapid Publications, 2012
By propagating beamlets from a periodically placed array of single-mode fiber amplifiers in a large mode-are (LMA) fiber, we find that a self-image of the initial beamlets is formed at certain distances in the LMA fiber.
Zhou R., Zhan Q., Powers P. E., Ibarra-Escamilla B., Haus J. W.   +4 more
doaj   +1 more source

Optimisation of short pulse multi-stage Yb fiber amplifier systems using commercial gain-modelling software

, 2006
We demonstrate the accuracy of commercial telecommunications industry software for modelling Yb-fiber amplifiers. Simulations enabled optimisation of a broad bandwidth ultra-short pulse four-stage amplifier system. The predicted results were confirmed by
D. J. Richardson, Richardson, David J., F. He, J.H.V. Price, He, Fei, Price, Jonathan H.V.   +5 more
core   +1 more source

Tunable single-frequency ytterbium-sensitized erbium-doped fiber MOPA source with 150W (51.8 dBm) of output power at 1563 nm [PDF]

, 2005
A single-frequency, single-mode ytterbium-sensitized erbium-doped fiber master-oscillator power-amplifier generated 150 W of continuous-wave output power at 1563 nm with 33% slope efficiency and was tuned in the range of 1546 to 1566 nm at >125 ...
Jeong, Y., J. Nilsson, Nilsson, J., Codemard, C.A., Y. Jeong, Soh, D.B.S., D.B.S. Soh, C.A. Codemard, Sahu, J.K., J.K. Sahu   +9 more
core   +1 more source

Optical Fiber Amplifiers: Optimization and PerformanceEvaluation

Diyala Journal of Engineering Sciences, 2019
This work demonstrates the simulation of two different types of optical fiber amplifiers (OFA) utilizing OptiSystem–10, namely, 3 m length of erbium doped fiber amplifier (EDFA) and 7 km length of Raman fiber amplifier (RFA).
A. k. Abass, Mohammed J. Abdul-Razak, Haneen H. Mohammed, Suad M. Kadhim, Mohammed A. Salih   +4 more
doaj   +1 more source

Fiber modulators and fiber amplifiers for LISA

Journal of Physics: Conference Series, 2010
We present the sideband phase characteristics of a fiber-coupled integrated electro-optical modulator (EOM) at a modulation frequency of 2 GHz for Fourier frequencies from 0.1 mHz to 1 Hz. The upper phase noise limit was almost an order of magnitude better than required for LISA. The EOM's phase dependencies on temperature and transmitted optical power
Tröbs, Michael, Barke, S., Möbius, J., Engelbrecht, M., Theeg, T., Kracht, D., Sheard, Benjamin, Heinzel, Gerhard, Danzmann, Karsten   +8 more
openaire   +1 more source

Fiber optical amplifiers [PDF]

Optical Fiber Communication, 1990
Outline:Advantages of erbium-doped fibre amplifiers (EDFA)Fabrication of rare-earth-doped fibresAmplifier fundamentalsSpectroscopy of erbiumPump requirementsAmplifier gain and saturationInterchannel crosstalkNoiseSystem ...
Payne, D.N., Laming, R.I.
openaire   +2 more sources

Ultra-short wavelength operation of thulium-doped fiber amplifiers and lasers.

Optics Express, 2019
We fabricate and characterize a germanium/thulium (Ge/Tm) co-doped silica fiber in order to enhance the gain at the short wavelength edge of the thulium emission band (i.e. 1620-1660 nm).
Shaoxiang Chen, Yongmin Jung, S. Alam, D. Richardson, R. Sidharthan, D. Ho, S. Yoo, J. Daniel   +7 more
semanticscholar   +1 more source

Seeding High Brightness Fiber Amplifiers With Multi-Phase Coded Signal Modulation for SBS Effect Management

IEEE Access, 2020
We propose a new modulation approach based on multi-phase coded signal (MPCS) to increase stimulated Brillouin scattering (SBS) threshold in high power narrow-linewidth fiber amplifiers.
Wenchang Lai, Pengfei Ma, Wei Liu, Can Li, Rongtao Su, Yanxing Ma, Jian Wu, Man Jiang, Pu Zhou   +8 more
doaj   +1 more source

Tunable 60 GHz Multiwavelength Brillouin Erbium Fiber Laser

Applied Sciences, 2023
An experimental study of a tunable 60 GHz multiwavelength Brillouin erbium fiber laser is presented in this paper. Two unidirectional ring laser cavities and two pre-amplification laser cavities are used.
Mohammed K. Awsaj, Thamer Fahad Al-Mashhadani, Mohammed Kamil Salh Al-Mashhadani, Rabi Noori Hammudi, Ali yaseen Ali, Mohad Saiful Dzulkefly Zan, Norhana Arsad   +6 more
doaj   +1 more source

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

FEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa, Shinya Sugimoto, Toshiro Sato   +2 more
wiley   +1 more source