Fiber Room
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Sticker Decal Vinyl Window Wall Silly Space Monster Fantasy Childrens Room A879 $3.95 |
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NEW Crestron DigitalMedia 8G™ DM-RMC-100-S Fiber Receiver & Room Controller $399.00 |
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NIB Crestron DigitalMedia™ DM-RMC-100-F Fiber Receiver & Room Contoller $299.00 |
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Crestron Digital Media Fiber Receiver & Room Controller DM-RMC-100-F $420.00 |
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Young Angel Fiber Optic Night Light Room Light NEW $4.99 |
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Special Edition Woven Fiber 3 Panel Room Divider in Turquoise Blue $105.00 |
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Woven Fiber 3 Panel Room Divider in Natural and Reddish Brown SSFIBER6-3P $105.00 |
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Special Edition Woven Fiber 3 Panel Room Divider in Light Pink SSFIBER2-3P-PNK $105.00 |
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Oriental Furniture Special Edition Woven Fiber 3 Panel Room Divider in Gray $105.00 |
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Oriental Furniture Special Edition Woven Fiber 3 Panel Room Divider in Rust $105.00 |
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Oriental Furniture Fiber Weave 4 Panel Room Divider in Dyed Dark Mocha $122.00 |
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Oriental Furniture Fiber Weave 6 Panel Room Divider in Dyed Dark Mocha $172.00 |
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Oriental Furniture Fiber Weave 6 Panel Room Divider in Dyed Dark Red $172.00 |
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Oriental Furniture Fiber Weave 6 Panel Room Divider in Dyed Light Beige $172.00 |
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Oriental Furniture Fiber Weave 4 Panel Room Divider in Dyed Dark Red $122.00 |
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Oriental Furniture Fiber Weave 6 Panel Room Divider in Dyed Natural $172.00 |
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Special Edition Woven Fiber 3 Panel Room Divider in Aqua Blue SSFIBER2-3P-ABL $105.00 |
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Oriental Furniture Woven Fiber 4 Panel Room Divider in Olive and Black $140.00 |
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Oriental Furniture Fiber Weave 4 Panel Room Divider in Dyed Natural $122.00 |
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Oriental Furniture Woven Fiber 4 Panel Room Divider in Black and White $140.00 |
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Special Edition Woven Fiber 3 Panel Room Divider in Blue Jeans SSFIBER2-3P-BLJ $105.00 |
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Oriental Furniture Woven Fiber 4 Panel Room Divider in Brown and Tan $140.00 |
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Woven Fiber 4 Panel Room Divider in Natural and Reddish Brown SSFIBER6-4P $140.00 |
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Oriental Furniture Fiber Weave 3 Panel Room Divider in Dyed Black $97.00 |
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Oriental Furniture Fiber Weave 3 Panel Room Divider in Dyed Dark Beige $97.00 |
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Oriental Furniture Fiber Weave 3 Panel Room Divider in Dyed White $97.00 |
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Oriental Furniture Fiber Weave 3 Panel Room Divider in Dyed Dark Mocha $97.00 |
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Oriental Furniture Fiber Weave 3 Panel Room Divider in Dyed Dark Red $97.00 |
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5.5′ Tall Fiber Weave Room Divider Natural 3 Panel $93.00 |
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7′ Tall Woven Fiber Room Divider Dark Mocha 3 Panel $168.00 |
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Room Ornament Fiber Optic Colorful Light Potted Pink Fabric Flower $9.51 |
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Oriental Furniture Woven Fiber 4 Panel Room Divider in Light Green $102.00 |
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4 ft. Tall Woven Fiber Room Divider Dark Mocha 4 Panel $102.00 |
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7 ft. Tall Woven Fiber Room Divider Black 6 Panel $328.00 |
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Oriental Furniture Fiber Weave 6 Panel Room Divider in Dyed Black $172.00 |
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1965 Room Service home decor Fabrics with Celanese Fibers vintage book $0.99 |
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Oriental Furniture Fiber Weave 3 Panel Room Divider in Dyed Natural $97.00 |
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7 ft. Tall Woven Fiber Room Divider Dark Beige 6 Panel $328.00 |
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Oriental Furniture Special Edition Woven Fiber 3 Panel Room Divider in Burgundy $105.00 |
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Woven Fiber 6 Panel Room Divider in Natural and Reddish Brown SSFIBER6-6P $206.00 |
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It’s Your Room Lot of 2 Queen Size Sheet Sets Micro Fiber $34.99 |
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Oriental Furniture Fiber Weave 4 Panel Room Divider in Dyed Dark Beige $122.00 |
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Oriental Furniture Woven Fiber 3 Panel Room Divider in Black and White $105.00 |
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Oriental Furniture Woven Fiber 3 Panel Room Divider in Brown and Tan $105.00 |
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Oriental Furniture 7 ft. Tall Woven Fiber Room Divider Black 8 Panel $428.00 |
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Oriental Furniture 7 ft. Tall Woven Fiber Room Divider Dark Beige 8 Panel $428.00 |
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Oriental Furniture 7 ft. Tall Woven Fiber Room Divider Cream 8 Panel $428.00 |
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Oriental Furniture 7 ft. Tall Woven Fiber Room Divider Dark Mocha 8 Panel $428.00 |
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Oriental Furniture 7 ft. Tall Woven Fiber Room Divider Red/Black 8 Panel $428.00 |
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Oriental Furniture 7 ft. Tall Woven Fiber Room Divider White 8 Panel $428.00 |
Fiber Optics Microwave Transmission
Optical fiber is the medium of choice for high capacity digital transmission systems and high speed local area network. Besides these applications, optical fiber also can be used to transmit microwave signals for cable television, cellular radio, WLAN and microwave antenna remoting. To transmit microwave over optical fiber, the microwave signal is converted into optical form at the input of the fiber and at the output of the fiber, it is converted back to electrical signal. The main advantage of fiber transmission of microwave is reduced losses relative to metallic media (e.g. copper coaxial cable). This results in longer transmission distance without signal amplification or use of repeaters.
There are two approaches to optical signal modulation and recovery. The first type is IMDD (Intensity Modulation Direct Detection) and the second type is Coherent Detection. In IMDD, the optical source intensity is modulated by the microwave signal and the resulting intensity modulated signal passes through the optical fiber to a photodiode where the modulation microwave signal is converted back to electrical domain. In Coherent Detection, the optical source is modulated in intensity, frequency or phase by the microwave signal. The modulated signal passes through the optical fiber to the receiver where it is mixed with the output of a local oscillator (LO) laser. The combined signal is converted to electrical domain using a photodiode. This produces an electrical signal centered on the difference frequency between the optical source and the LO laser (i.e. intermediate frequency). This signal is further processed to recover the analog microwave signal.
RFoG (Radio Frequency over Glass) is the cable operators’ implementation of microwave transmission over optical fiber in which the coax portion of the HFC (Hybrid Fiber Coax) is replaced by a single fiber, passive optical network architecture (PON). RFoG allows cable operators to deploy fiber connectivity to customer premises (FTTP) while keeping its existing HFC and DOCSIS infrastructure. Like the HFC architecture, video controllers and data networking services are fed through a CMTS/edge router.
These electrical signals are then converted to optical and transported via a 1550 nm wavelength through a wavelength division multiplexer (WDM) and a passive splitter to a R-ONU (RFoG Optical Network Unit) located at the customer premises. R-ONUs terminate the fiber connection and convert the traffic to RF for delivery over the in-home network. Video traffic can be fed over coax to a set-top box, while voice and data traffic can be delivered to an embedded multimedia terminal adapter (eMTA), The return path for voice, data, and video traffic is over a 1310 nm or 1590 nm wavelength to a return path receiver, which converts the optical signal to RF and feeds it back into the CMTS and video controller.
The advantage of radio-over-fiber technology is that it centralizes most of the transceiver functionality by transmitting the microwave signals in their modulated format over fiber. This reduces the number of access points to antennas with amplifiers and frequency converters. In-building passive picocell for GSM or UMTS is implemented using radio-over-fiber. Wireless base stations are located in a central communications room and their outputs/inputs fed through RF multiplexers to lasers/photodiodes contained within the optical transceiver hub. The modulated optical signals are linked to/from the remote antenna units (AUs) in the building using single-mode optical fiber. The base station uses a combined detector/optical modulator, which is directly coupled to the antenna, so that no electrical amplification or other processing is required.
About the Author
Paul Ngai is a telecom consultant specialized in RF and Fiber Optic Networks. He is also the principal of Network Systems Technologies LLC (http://www.nstecs.net), a telecommunications consulting firm provides planning, analysis, design, testing and operation support services.
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