Journal ArticleDOI
A four-channel lightwave subsystem using wavelength division multiplexing
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TLDR
In this article, a four-channel multimode transmission subsystem employing wavelength division multiplexing (WDM) was assembled and optically evaluated for both multiplexer/demultiplexer (Mux/Demux) pair.Abstract:
A four-channel multimode transmission subsystem employing wavelength division multiplexing (WDM) was assembled and optically evaluated. Diffraction grating devices with identical fibers for inputs and outputs were used for both multiplexing and demultiplexing. The 1-dB full width of the passbands was ∼4 nm thus there was a requirement for wavelength selection and temperature tuning of the corresponding laser sources. A temperature excursion of 7°C from the optimum resulted in 1 dB of additional attenuation. Insertion losses for the multiplexer/demultiplexer (Mux/Demux) pair were 3.7, 3.6, 4.7, and 7.3 dB at 812, 830, 867, and 885 nm, respectively. The higher losses at 867 and 885 nm were due to chromatic abberation. The channel spacing of 18 nm is smaller than could be achieved with state-of-the-art filter devices. For unidirectional transmission the out of band rejection exceeded 40 dB in all channels.read more
Citations
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Patent
Integrated bi-directional axial gradient refractive index/diffraction grating wavelength division multiplexer
TL;DR: In this article, the authors proposed a wavelength division multiplexer that integrates an axial gradient refractive index element with a diffraction grating to provide coupling from a plurality of input optical sources (each delivering a single wavelength) which are multiplexed to a single polychromatic beam for output to an output optical receiver.
Patent
Compact double-pass wavelength multiplexer-demultiplexer having an increased number of channels
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TL;DR: An optical multiplexing and demultiplexing device includes: a plurality of optical fibers each terminating in a fiber end for radiating and receiving corresponding light beams; a fiber mounting assembly configured to support the optical fibers so that the fiber ends terminate in substantially the same plane, the mounting assembly also being configured to position the fibers in a regular array of N rows and M columns as mentioned in this paper.
Journal ArticleDOI
Fiber-optic wavelength-division multiplexing and demultiplexing using volume holographic gratings.
TL;DR: A novel fiber-optic wavelength-division multiplexing (WDM) design employing a broadband (>150-nm) dichromated gelatin volume holographic grating operating in a reflective Littrow configuration with on-axis optics, a single lens, and one fiber array can provide cost and performance benefits for local area network communication applications.
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Integrated bi-directional gradient refractive index wavelength division multiplexer
TL;DR: In this paper, a dispersive element comprising a radial (or axial) gradient refractive index for combining the plurality of optical input beams into a single optical beam and operatively associated with the planar front surface was proposed.
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Compact double-pass wavelength multiplexer-demultiplexer
TL;DR: An optical multiplexing and demultiplexing device including a fiber mounting assembly for aligning optical fibers, a set of collimating and focusing optics, a transmission grating element, and a mirror element is described in this paper.
References
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Journal ArticleDOI
Applications of GRIN-rod lenses in optical fiber communication systems.
TL;DR: In this article, the authors present a detailed review of the performance of various GRIN-rod lens devices, including connectors, attenuators, directional couplers, switches, isolators and wavelength division multiplexers.
Journal ArticleDOI
Microoptic grating multiplexers and optical isolators for fiber-optic communications
Kohroh Kobayashi,M. Seki +1 more
TL;DR: In this paper, Grating multiplexers and isolators for 0.8 μm band employing micro-optic approach have been developed for increasing further the utility of and to expand the application of fiberoptic communications.
Journal ArticleDOI
Low-loss wavelength division multiplexing (WDM) devices for single-mode systems
J. Lipson,G. Harvey +1 more
TL;DR: In this paper, the average insertion loss for the multiplexers was 0.5 ± 0.2 and 1.0 ± 1.3 dB for the short and long wavelength channels, respectively.
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