Patent
Splitterless optical broadcast switch
TLDR
In this article, a splitterless optical broadcast switch (110) includes an optical source (112) for generating a plurality of unmodulated optical carrier signals, and a first stage routing module (114) routes the plurality of unpaired optical carrier signal.Abstract:
A splitterless optical broadcast switch (110) for routing a plurality of optical carrier signals. The splitterless optical broadcast switch (110) includes an optical source (112) for generating a plurality of unmodulated optical carrier signals. A first stage routing module (114) routes the plurality of unmodulated optical carrier signals. A modulating module (116) receives a plurality of RF input signals and modulates each of the RF input signals onto any number of the unmodulated optical carrier signals to generate a plurality of modulated optical carrier signals. A second stage routing module (118) routes the plurality of modulated optical carrier signals complimentary to the first stage routing module (114). An output module (120) receives the plurality of modulated optical carrier signals such that the optical output from the optical source (112) is paired to a complimentary optical input of the output module (120).read more
Citations
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Patent
Modular all-optical cross-connect
TL;DR: In this paper, the first and second plurality of multiport optical devices (410, 610) have at least one input port for receiving a WDM optical signal and a plurality of output ports for selectively receiving one of more wavelength components of the optical signal.
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Patent
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TL;DR: In this article, an optical system for remotely optical communications at a high data rate between a base station and a remote station under atmospheric turbulence conditions is described. But it does not use the conventional type of retroreflection, but instead consists of two sets of lenslets coupled with a single-mode fiber array, called fiber "retro".
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Linearized optical link using a single Mach-Zehnder modulator and two optical carriers
TL;DR: In this article, an improved analog optical system which provides improved dynamic range as well as sensitivity relative to known analog optical systems is presented. But, the system requires two optical wavelengths with two effective bias points to cancel even ordered distortion associated with low bias.
Patent
Optical communication device
V. G. Sidorovich,Aleksei A. Leshev,Valery V. Ragulsky,Mikhail A. Sadovnikov,Mikhail V. Vasiliev,Vladimir P. Vasiliev +5 more
TL;DR: In this article, the authors proposed a two-way free-space optical communication system where the optical receivers are provided with fiberoptic receiving pigtails with input ends positioned on the curved surface at locations relative to the wide-angle objective lens, which are optically conjugated with the remote subscriber radiation sources.
References
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Patent
Satellite communications system
TL;DR: In this article, an improved system for acquiring and tracking an optical beam is presented. But the system is used to facilitate optical communication between two satellites and provides an improved technique for acquisition and tracking two optical beams.
Patent
Wavelength division multiplexing using a tunable acousto-optic filter
Kwok Wai Cheung,Michael Muk Choy +1 more
TL;DR: In this paper, a tunable acousto-optical filter in the receiving station is electrically tuned to the laser frequency carrying the desired data signal and passes only the optical signal with that frequency to an optical detector.
Patent
Optical demultiplexer for optical/rf signals
TL;DR: In this article, an optical demultiplexer includes an electrooptic modulator (410) which modulates a beam of light (418) in response to frequency-multiplexed radio-frequency (RF) information signals, to produce diverging beamlets of light.
Patent
A multiwavelength simultaneous monitoring circuit employing arrayed-waveguide grating
TL;DR: In this paper, a multi-wavelength simultaneous monitoring circuit capable of precise discrimination of wavelengths of a WDM (Wavelength Division Multiplexed) signal including multiplexed wavelength waves, and suitable for optical integrated circuits having large resistance to vibration is presented.
Patent
Radio-optical transmission system, in particular for space telecommunications
TL;DR: In this paper, a radio-optical interface between a first modulated radio wave (15) and a light wave (18) is presented, where the transmitted light wave is subjected to wavelength modulation.