Patent
Method and apparatus for duplex communication in hybrid fiber-radio systems
TLDR
In this paper, an apparatus and method for enabling cost-effective duplex communication by diplexing one of down stream signals for frequency up-conversion in a hybrid fiber-radio system is presented.Abstract:
An apparatus and method for enabling cost-effective duplex communication by diplexing one of down stream signals for frequency up-conversion in a hybrid fiber-radio system includes diplexing an unmodulated mode signal among beating signals between a master laser and an injection-locked slave laser and using the diplexed signal for down-conversion in upstream transmission, thereby eliminating the need for expensive high-frequency local oscillators for frequency conversion. Higher radio frequency signals can be generated using beating between basic modes and satellite modes such as FWM conjugates of the master laser and slave laser. Cost-effective systems, stabilization of a light source and improved transmission performance may be achieved by using a diplexer instead of an expensive high-frequency local oscillator.read more
Citations
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References
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Proceedings ArticleDOI
Transmission of CDMA signals over an analog optical link
S.L. Woodward,S. Ariyavisitakul +1 more
TL;DR: In this article, the authors present specifications for transmission of code-division-multiple-access (CDMA) signals over an optical link, and demonstrate that unisolated, uncooled Fabry-Perot lasers can meet these requirements.
Patent
System for converter for providing downstream second FDM signals over access path and upstream FDM signals sent to central office over the second path
TL;DR: In this article, a Mini Fiber Node MFN is proposed for use in a communication network, which includes a signal distribution unit (e.g., fiber node FN) for transmitting frequency-division multiplexed communication signals downstream over a coax cable to a node apparatus (amplifier) and via an access path to a plurality of end unit apparatuses connected thereto.
Patent
Optical to microwave converter using direct modulation phase shift keying
TL;DR: In this article, a point-to-point microwave radio link that operates in a Frequency Division Duplex (FDD) mode using direct digital modulation with a Continuous Phase Shift Keyed (PSK) scheme is presented.
Patent
Two-optical signal generator for generating two optical signals having adjustable optical frequency difference
TL;DR: In this paper, a two-optical signal generator is provided for generating two optical signals, where a difference between optical frequencies or optical wavelengths of the two optical signal can be adjusted.
Journal ArticleDOI
120 Mbit/s QPSK radio-fibre transmission over 100 km of standard fibre at 60 GHz using a master/slave injection-locked DFB laser source
L. Noel,D.D. Marcenac,D. Wake +2 more
TL;DR: In this paper, a 120 Mbit/s QPSK radio signal has been transported over 100 km of optical fibre and then transmitted on a 60 GHz carrier in free-space using an injection-locked master/slave DFB arrangement.