Author: Fiber-MART.COM

eShop of Fiber Optic Network, Fiber Cables & Tools

Why Optical Fiber for the Medical Industry?

by http://www.fiber-mart.com

Even though the first use of lasers in medicine was reported by Goldman in 1962-and then in 1963 for experimental cardiovascular plaque ablation-it is the Aesthetic and Ophthalmic applications that historically pushed the use and adoption of photons in medicine. In addition to invasive and non-invasive cosmetic treatments and ophthalmic therapies, urology is another mature market today using lasers and optical fiber probes. In this market lasers and optical fibers are used in transurethral laser therapy for benign prostatic hyperplasia (BPH) and kidney stone ablation.
What are the next big emerging markets? Groups and organizations in the public and private sectors are developing systems that incorporate an optical fiber probe for diagnostic and therapeutic purposes. Many of these applications target disposable probes at high volume procedures. This creates a challenge for device manufacturers and their suppliers to produce, on a repeatable basis, an optical probe requiring crucial complex engineering and control at a price point the market (and insurance companies) can bear. In vivo probes for optical coherence tomography are already on the market. Other examples of emerging applications include: cancer detection; tumor ablation; other soft tissue ablation such as meniscuses; probes for sensing and imaging; and the incorporation of optical fiber in existing medical devices found in MRI suites, radiation suites, and X-Ray suites.

Searching Deep Space via Optical Fiber

by http://www.fiber-mart.com

For the first time, researchers have shown that a stable frequency reference can be reliably transmitted for more than 300 kilometers over a standard fiber optic telecommunications network in order to synchronize two radio telescopes.
In The Optical Society of America’s Optica journal, researchers from a consortium of Australian institutions recently reported this successful transmission between two radio telescopes using an optical fiber link. They also demonstrated that the technique’s performance was superior to using an atomic clock at each telescope.
Stable frequency references, used to calibrate clocks and instruments that make ultra-precise measurements, are usually only available at facilities that use expensive atomic clocks to generate the references. This new technology could help scientists anywhere to access the frequency standard by simply tapping into the telecommunications network.
This new technique required no substantial changes to the rest of the fiber optic network and was easy to implement. Most impressively, the demonstration was performed over a fiber optic network that was transmitting live telecommunications traffic at the same time. By running the experiment on optical fibers carrying normal traffic, the researchers showed that transmitting the stable frequency standard did not affect the data or telephone calls on other channels.
To keep the frequency stable during transmission, the researchers sent the signal through the network to a selected destination and then reflected it back. Then, the returning signal was used to determine whether any changes occurred. After each round trip, any frequency shift was subtracted to precisely compensate for the measured changes. For every 100 kilometers of fiber, the round trip for the signal took approximately 1 millisecond.
According to the researchers, the successful demonstration shows that this new method is ready for use by radio astronomers who want to avoid using multiple atomic clocks across a telephone array. This capability would also allow any scientist with access to a telecommunications network to broadcast stable frequency references across a national fiber optic network.
The ability to send stable frequency references over a telecommunications network may be especially useful for radio telescope arrays such as the Square Kilometer Array (SKA).  SKA is a global effort to build the world’s largest telescope using arrays in Australia and South Africa. When completed, SKA will detect faint radio waves from deep space with an approximately 50 times greater sensitivity than that of the Hubble telescope. In addition, individual radio telescopes will be linked to create a total collection area of about 1 million square meters.
The research group hopes that ready access to frequency standards as stable as those in a national measurement laboratory will serve as an enabling technology for many applications that demand precise timing and accurate frequency measurements.

Basic Fiber Optic Cable Tool Kit

by http://www.fiber-mart.com

The fiber-mart.com Basic Fiber Optic Tool Kit provides you with dozens of basic tools that are essential for fiber optic termination, splicing, and testing. The kit includes strippers, cable slitters and other precision hand tools, consumable products, and much more. All of the contents are packed in a durable case, keeping the items you need within easy reach. Contents of the entire kit are listed below.
Contents of Fiber Cable Tool Kit
PVC Electrical Tape
3oz. Alcohol Bottle
Fiber Strippers
Connector Cleaner
Kevlar Scissors
Jacket Stripper
Buffer Tube Stripper
Round Cable Slitter
6 Side Cutting Pliers
50 Foam Swabs
Kim Wipes
Utility Knife
Tweezers
Needle Nose Pliers
Piano Wire
4 Bit Screwdriver
Black Marker
Safety Glasses
5 D-Gel Wipes
Black Work Mat
Fiber Disposal Unit
Ruler
Fabric Tape Measure
1/2 Nut Driver
3 Economy Tie Labels
Rugged Carry Case
5 Fusion Splice Sleeves
1Mtr 3mm Furcation
1Mtr 900µm Furcation

How to Use OADM in WDM Network ?

OADM is a cost-effective and easy to use passive fiber optic component, which can provide easy to build and grow connectivity environment for WDM network.

OADM is a cost-effective and easy to use passive fiber optic component, which can provide easy to build and grow connectivity environment for WDM network.Optical add-drop multiplexer is one of the key devices to implement such optical signal processing. Use of OADM makes it possible to freely add or drop signals with arbitrary wavelengths over multiplexed optical signals by assigning a wavelength to each destination.this article ,Let us introduce how to use OADM in WDM Network?

Inside an OADM

A traditional OADM consists of three parts: an optical demultiplexer, an optical multiplexer and between them a method of reconfiguring the paths between the optical demultiplexer, the optical multiplexer and a set of ports for adding and dropping signals. The multiplexer is used to couple two or more wavelengths into the same fiber. Then the reconfiguration can be achieved by a fiber patch panel or by optical switches which direct the wavelengths to the optical multiplexer or to drop ports. The demultiplexer undoes what the multiplexer has done. It separates a multiplicity of wavelengths in a fiber and directs them to many fibers.

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Main Function and Principle of OADM

For an OADM, “Add” refers to the capability of the device to add one or more new wavelength channels to an existing multi-wavelength WDM signal while “drop” refers to drop or remove one or more channels, passing those signals to another network path. The OADM selectively removes (drops) a wavelength from a multiplicity of wavelengths in a fiber, and thus from traffic on the particular channel. It then adds in the same direction of data flow the same wavelength, but with different data content. The main function of OADM function is shown in the following picture. This function is especially used in WDM ring systems as well as in long-haul with drop-add features.

How to Connect OADM With WDM MUX/DEMUX

In most cases, OADM is deployed with CWDM or DWDM MUX/DEMUX. It is usually installed in a fiber optic link between two WDM MUX/DEMUXs. The following picture shows a CWDM network using a 1-channel dual fiber OADM between two CWDM MUX/DEMUXs. Signals over 1470 nm are required to be added to and dropped from the dual fiber link. On the OADM, there are usually one port for input and one port for output. The OADM can be regarded as a length of fiber cable in the fiber link. The point is the one or more strand of signals is added or dropped when the light goes through the OADM.

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Summary

OADM is still evolving, and although these components are relatively small, they are immeasurable in the future.Optical Add-Drop Multiplexer (OADM) is used for multiplexing and routing different channels of fiber into or out of a single fiber. The CWDM OADM is designed to optically add/drop one or multiple CWDM channels into one or two fibers. Fiber-Mart provides a series of OADM modules which can be Customized. For more information, welcome to visit www.fiber-mart.com or contact me by e-mail: service@fiber-mart.com

What is An Optical Module?

An optical transceiver chip is an integrated circuit (IC) that transmits and receives data using optical fiber rather than electrical wire. Optical fiber, also called fiber optic, refers to the technology associated with the transfer of information in light beams or pulses along solid transparent fibers or cables. optical transceiver chips facilitate the use of fiber to the premises (FTTP) services, in which optical fiber runs from central hubs all the way to the end users. This can provide extremely high-speed Internet access. Optical fiber systems can also be used to transmit and receive telephone communications and to receive digital television broadcasts.

 

Fiber Optic Transceivers Modules

 

An optical fiber transceiver is also called fiber optic transmitter and receiver, the function of the optical module is photoelectric conversion. The transmitter end takes in and converts the electrical signal into light, after the optical fiber transmission in the fiber cable plant, the receiver end again converts the light signal into electrical signal. Both the receiver and the transmitter ends have their own circuitry and can handle transmissions in both directions.

 

Types

 

There are a number of different  types of  fiber optic transceivers available in the market. They differ in the type of connections, data transmission speed, as well as packing forms. According to the package, common type of fiber optic transceivers popular in the market is SFP, SFP+, XFP, X2, Xenpak, GBIC. According to the fiber type it connect to, there are MM (multimode), SM (Single mode), as well as WDM fiber (CWDM, DWDM modules).

Single Mode vs. Multimode Optical Modules: How Do You Choose?

 

Transceiver module usually come in either single mode or multimode modules. Chances are that you may make a choice between these two types transceiver module. But before that, there are a couple of factors you should consider. Single mode transceiver modules support longer reach data transmission and higher speed rates than multimode transceiver module. That’s mainly because multimode modules have shorter wavelength(around 850nm) than single mode modules(around 1260nm-1650nm). But in datacom environments, both singlemode transceiver modules and multimode transceiver modules can accommodate speeds beyond 50G as of today. And due to the “fragility” of single mode fiber system, single mode modules usually cost more than multimode. But single mode fiber costs less than multimode fiber. With regard to how to save largest budget, read this article for cost comparison: Single-mode Cabling Cost vs. Multimode Cabling Cost. So if you are hovering over the two types, port speed, desired reach and interconnect topology and total cost should be considered as the main decision criteria.

 

Can Single Mode Optical Modules Connect to Multimode Optical Modules?

 

The short answer for this question is no. Single mode module is 1310nm laser-based, and multimode module is 850nm LED-based, therefore, single mode optical modules only work over single mode fiber and multimode optical modules only work over multimode fiber. Single mode module should be used with single mode module over single mode fibers, and multimode module should be used with multimode module over multimode fibers. We can’t connect single mode module to multimode module. But for some optical modules that can work both over single mode and multimode fibers, such as 1310nm laser-based 1000BASE-LX/LH modules.

 

Conclusion

 

With the rapid development of Internet service and communication industry, optical communication is bound to become the most important strategic industry in 21th century. The elementary components of a basic optical communication consists of Ethernet switch, WDM passive device, optical module etc. Optical modules are the key building blocks for all network connectivity both inside and outside the data center. Fiber-Mart manufactures and supplies a complete range of optical modules which can be Customized. for more information, welcome to visit www.fiber-mart.com or contact me by e-mail: service@fiber-mart.com

What is an Optical Module?

An optical transceiver chip is an integrated circuit (IC) that transmits and receives data using optical fiber rather than electrical wire.

 

An optical transceiver chip is an integrated circuit (IC) that transmits and receives data using optical fiber rather than electrical wire. Optical fiber, also called fiber optic, refers to the technology associated with the transfer of information in light beams or pulses along solid transparent fibers or cables. optical transceiver chips facilitate the use of fiber to the premises (FTTP) services, in which optical fiber runs from central hubs all the way to the end users. This can provide extremely high-speed Internet access. Optical fiber systems can also be used to transmit and receive telephone communications and to receive digital television broadcasts.

 

Fiber Optic Transceivers Modules

 

An optical fiber transceiver is also called fiber optic transmitter and receiver, the function of the optical module is photoelectric conversion. The transmitter end takes in and converts the electrical signal into light, after the optical fiber transmission in the fiber cable plant, the receiver end again converts the light signal into electrical signal. Both the receiver and the transmitter ends have their own circuitry and can handle transmissions in both directions.

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Types

There are a number of different  types of  fiber optic transceivers available in the market. They differ in the type of connections, data transmission speed, as well as packing forms. According to the package, common type of fiber optic transceivers popular in the market is SFP, SFP+, XFP, X2, Xenpak, GBIC. According to the fiber type it connect to, there are MM (multimode), SM (Single mode), as well as WDM fiber (CWDM, DWDM modules).

 

Single Mode vs. Multimode Optical Modules: How Do You Choose?

Transceiver module usually come in either single mode or multimode modules. Chances are that you may make a choice between these two types transceiver module. But before that, there are a couple of factors you should consider. Single mode transceiver modules support longer reach data transmission and higher speed rates than multimode transceiver module. That’s mainly because multimode modules have shorter wavelength(around 850nm) than single mode modules(around 1260nm-1650nm). But in datacom environments, both singlemode transceiver modules and multimode transceiver modules can accommodate speeds beyond 50G as of today. And due to the “fragility” of single mode fiber system, single mode modules usually cost more than multimode. But single mode fiber costs less than multimode fiber. With regard to how to save largest budget, read this article for cost comparison: Single-mode Cabling Cost vs. Multimode Cabling Cost. So if you are hovering over the two types, port speed, desired reach and interconnect topology and total cost should be considered as the main decision criteria.

 

Can Single Mode Optical Modules Connect to Multimode Optical Modules?

The short answer for this question is no. Single mode module is 1310nm laser-based, and multimode module is 850nm LED-based, therefore, single mode optical modules only work over single mode fiber and multimode optical modules only work over multimode fiber. Single mode module should be used with single mode module over single mode fibers, and multimode module should be used with multimode module over multimode fibers. We can’t connect single mode module to multimode module. But for some optical modules that can work both over single mode and multimode fibers, such as 1310nm laser-based 1000BASE-LX/LH modules.

 

Conclusion

With the rapid development of Internet service and communication industry, optical communication is bound to become the most important strategic industry in 21th century. The elementary components of a basic optical communication consists of Ethernet switch, WDM passive device, optical module etc. Optical modules are the key building blocks for all network connectivity both inside and outside the data center.Fiber-Mart manufactures and supplies a complete range of optical modules which can be Customized. for more information, welcome to visit www.fiber-mart.com or contact me by e-mail: service@fiber-mart.com