Patent
Optical fibre for improved power coupling
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TLDR
In this paper, an optical fiber having a single mode absorptive core (10) whose position, relative to the cross-sectional plane of the inner multimode cladding (12), varies along the length of the fibre.Abstract:
An optical fibre having a single mode absorptive core (10) whose position, relative to the cross-sectional plane of the inner multimode cladding (12), varies along the length of the fibre. The periodicity and the magnitude of the relative displacement of the core (10) with respect to the cladding (12) are such that the transfer of radiation from the inner multimode cladding (12) to the core (10) is substantially improved over conventional fibres.read more
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References
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PatentDOI
Optical fiber lasers and amplifiers
TL;DR: In this paper, the authors present an approach for coupling radiation into a single-mode core of an optical fiber laser with a relatively large, multimode cladding at a location which is displaced from the center of the cross-section of the cladding.
Patent
Method and apparatus for providing periodic subscription television services
TL;DR: In this article, a method and apparatus of providing periodic subscription television services where a microprocessor (300) controls a service denying switch (389) and a high frequency amplifier (387) such that service may be denied using the service-denying switch or the high-frequency amplifier was described.
Patent
Erbium-doped fiber amplifier
TL;DR: In this article, a rare earth doped optical amplifier with increased gain and lowered pump thresholds was proposed, achieving a saturation power of 11.3 dBm with only 54 mW of launch power at λ=1.49 μm.
Journal ArticleDOI
High-power cw neodymium-doped fiber laser operating at 9.2 W with high beam quality.
Holger Zellmer,U. Willamowski,Andreas Tünnermann,Herbert Welling,Sonja Unger,Volker Reichel,H.-R. Muller,Johannes Kirchhof,P Albers +8 more
TL;DR: It is reported on a 9.2-W cw, two-times diffraction-limited, neodymium-doped fiber laser operating in the 1.06-microm region that achieves slope efficiencies of more than 25% for pumping by a diode-laser system operating near 810 nm.
Patent
Optical waveguide light source
TL;DR: In this paper, an optical fiber having a thin, elongated core of laser material is so aligned with an end of an optical waveguide that coherent light generated in the core is coupled to the optical wave guide.