Category: Fiber Transceivers

Optical transceivers, Active Optic Cables, data center switches, and cable management in data centers.

How to guarantee the transmission distance of the XFP module?

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

With the increasingly fierce competition in the optical communication market, the price of the XFP module is irregular, such as Cisco, HUAWEI, H3C, Juniper, Brocade，Extreme etc. The price of these big brand module is very high, the market capacity of third party compatible module is increasing continuously.
Second-hand XFP module also appears on the market, so the customers will be prohibitive because of the high price for the big brand. But worry about the second-hand goods will bring unnecessary trouble to the communication if low price, so these days whether it is online or offline customers, they asked a lot of similar questions: “ Must be high quality! Can guarantee transmission to 80km?
Market demand for prices continue to decline, but the quality control has been unable to reduce the standard, but can’t reduce the standard of the quality control, this is also a great opportunity for our third party compatible module. In order to eliminate customer concerns and give end customers more quality assurance, let’s see how to guarantee the transmission distance of the optical transceiver?
According to the data rate:
155M, 622M, 1.25G, 4G, 6G, 8G, 10G, 40G, 100G…
According to the transmission distance:
300m, 550m, 2km, 10km, 15km, 20km, 30km, 40km, 60km, 80km, 100km, 120km
According to the connector:
LC connector optical transceiver, SC connector optical transceiver, RJ45 connector optical transceiver
According to the fiber quantity:
Single fiber xfp transceiver, dual fiber optical transceiver
According to the fiber type:
Single mode XFP transceiver, multimode optical transceiver
Different transmission distances need to be tested by different meters of optical fiber, for example:
SFP SX — 1.25G SFP 850nm MM 550m LC optical transceivers need to be tested by MM 50/125um 550m optical fiber.
Let’s see what actual distance optical fiber we have?
Do you think how about 120KM actual distance optical fiber? 40+80km=？ Estimated that you have guessed it?
Hope these sharing will be helpful for you! Fighting together!

How to Test a XFP Transceiver?

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

After installing the XFP transceiver, testing its performance is an essential step. How to test it? You may get the answer on this article.
There are four steps in testing an XFP transceiver (As shown in the following picture), which mainly includes the transmitter testing and receiver testing.
1. The input signal used to test the transmitter must be good enough. And also need to confirm the quality of electrical measurement by jitter measurement and eye diagram measurement. Eye diagram measurements are common ways to check transmitter output waveform, because eye diagram contains abundant information, can reflect the overall performance of the transmitter.
2. The optical output of the transmitter must be tested using several optical quality metrics such as eye diagram test, OMA (optical modulation amplitude), and Extinction Ratio.
Receiver Testing
To test a receiver, there are also two steps:
3. Unlike testing the transmitter, the quality of the optical signal must be poor enough when testing the receiver.
4、Finally, the electronic output signal of the receiver needs to be tested. There are three main types:
※ Eye diagram test, which ensures the “eyes” of eye diagram are open. The eye diagram test is usually achieved by BER(bit error ratio) depth
※ Jitter Test, testing different types of jitter
※ Jitter tracking and tolerance, testing the tracking of jitter in the internal clock recovery circuit
All in all, testing a optical transceiver is a complex job, but it is an indispensable step to ensure its performance. Fiberland provides all kinds of transceivers, which can be compatible with many brands, such as Cisco, HUAWEI, ZTE, Allied Telesis, HP, Brocade, DELL, Juniper. In Fiberland, each transceiver will be tested to ensure our customers to receive the products with superior quality.

The advantages of BiDi SFP+ transceiver

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

With the rapid development of communication, the requirement for the wireless bandwidth is getting higher and higher on the market. New products are developed by manufacturers of optical communications like BiDi SFP+ transceiver. Today we are sharing the apply of BiDi SFP+ transceiver.
BIDI is belong single-fiber bidirectional transceiver, only has 1 port, filtering through the filter in the transceiver, and finish the emission by 1310nm and reception by 1550nm at the same time, or on the contrary. So this kind of module must be used in pairs. Its biggest advantage is to save fiber resources. The common wavelength of BIDI transceiver are TX1310 / RX1550nm; TX1310 /RX 1490nm; TX1550 / RX1490nm.
SFP+ transceiver, (10 Gigabit Small Form Factor Pluggable) is a hot pluggable transceiver independent of communication protocol, the usual wavelength are 850nm, 1310nm or 1550nm. Used for 10G bps SONET/SDH, fiber channel, gigabit Ethernet, 10 gigabit Ethernet and other applications, also includes DWDM link.
Therefore, BiDi SFP+ transceiver is developed and designed based on the CPRI and OBSAI standard. BiDi SFP+ transceiver uses SFP+ small package, meet SFF- 8431 MSA, SFF-8432 and SFF -8472 and other protocol standards. Supports bidirectional transmission. Also supports different transmission distances, including 10km, 20km and 40 km etc. In addition, its operating temperature range is very wide, can be easily operated from 0℃ to 75℃, becomes the first choice for both indoor and outdoor communication networks, provides high-speed and stable signal transmission channel.
The advantages of BiDi SFP+ transceiver:
※ The transmission distance of TX1270/RX1330nm is 10KM / 20KM / 40KM / 60KM; TX1490/RX1550nm is 80KM
※ Single power +3.3V power supply
※ LVPECL/PECL data interface
※ Working temperature: 0℃-70℃
※ Meet the requirement of GR-468-CORE
※ Meet Laser Class 1，reach the requirement of IEC60825-1
※ Can supply the product that meet the requirement of RoHS
BiDi SFP+ transceiver widely uses in the existing wireless communication base station and new wireless communication base station, and set up a high-speed and stable signal transmission bridge between the communication base station and the optical fiber antenna. Fiberland is a company that devoted to the research and design of optical communication products, constantly develop and innovative to meet the market demand. The BiDi SFP+ from us got lots of praise and nice feedback from customers.

CWDM modules’ applications

Recently, some of our customers want to know more about the CWDM modules’ applications. Here we share some of CWDM knowledge to you, hope these can be helpful for your business!
1. What is CWDM modules?
With the CWDM optical transceiver, different wavelength can be transmitted by only one core. And it’s receiver can receive signal from 1270nm-1610nm.
2. Where is the CWDM modules can be used?
As the below picture, the CWDM modules can be used in kind of solutions.
3.What is the MUX/DEMUX?
A: We often transmit and receive information with optical fibers. Because the optical fiber can help us sharing the information fastly, saving time and improving efficiency.
On the other hand, it also needs to use lots of optical fibers, so in order to save optical fibers. We use MUX/DEMUX, it will help us concentrate the different wavelengths of information on one optical fiber.
Then spread them to the different switch when they need to be used.
4.How many channels can be used in CWDM MUX/DEMUX?
A: 18 channels, from 1270nm-1610nm.(1270nm, 1290nm, 1310nm, 1330nm, 1350nm, 1370nm, 1390nm,1410nm,1430nm, 1450nm, 1470nm, 1490nm,1510nm, 1530nm, 1550nm, 1570nm, 1590nm,1610nm.)
It includes forward wavelength(1270nm-1450nm, it’s usually used to low rate, like 1.25G ), backward wavelength(1470nm-1610nm, it’s usually used to high rate, like 2.5G, 10G)
5.How do they work together?
The CWDM Modules were inserted into switches, and between the modules and MUX/DEMUX, they connect with patch cords. Because of the MUX/DEMUX, we can save lots of optical fibers.
6. What do you need in a normal solution?
a. Switches: More than 2. (Depends on what’s the application you working for.)
b. CWDM Modules(Dual fiber): 16
c. MUX-DEMUX: 2
d. Patch cords: 32 & 1 testing patch cord(with an attenuator.)
e. Optical fiber: 1
Base on different applications, the solutions are different. It involved the switch type, MUX/DEMUX channel number, etc.
In a word, If you can tell us the project you are preparing(application), or where will the MUX/DEMUX(CWDM modules) be used, we can offer you the most suitable solution you need.

CWDM modules’ applications

Recently, some of our customers want to know more about the CWDM modules’ applications. Here we share some of CWDM knowledge to you, hope these can be helpful for your business!
1. What is CWDM modules?
With the CWDM optical transceiver, different wavelength can be transmitted by only one core. And it’s receiver can receive signal from 1270nm-1610nm.
2. Where is the CWDM modules can be used?
As the below picture, the CWDM modules can be used in kind of solutions.
3.What is the MUX/DEMUX?
A: We often transmit and receive information with optical fibers. Because the optical fiber can help us sharing the information fastly, saving time and improving efficiency.
On the other hand, it also needs to use lots of optical fibers, so in order to save optical fibers. We use MUX/DEMUX, it will help us concentrate the different wavelengths of information on one optical fiber.
Then spread them to the different switch when they need to be used.
4.How many channels can be used in CWDM MUX/DEMUX?
A: 18 channels, from 1270nm-1610nm.(1270nm, 1290nm, 1310nm, 1330nm, 1350nm, 1370nm, 1390nm,1410nm,1430nm, 1450nm, 1470nm, 1490nm,1510nm, 1530nm, 1550nm, 1570nm, 1590nm,1610nm.)
It includes forward wavelength(1270nm-1450nm, it’s usually used to low rate, like 1.25G ), backward wavelength(1470nm-1610nm, it’s usually used to high rate, like 2.5G, 10G)
5.How do they work together?
The CWDM Modules were inserted into switches, and between the modules and MUX/DEMUX, they connect with patch cords. Because of the MUX/DEMUX, we can save lots of optical fibers.
6. What do you need in a normal solution?
a. Switches: More than 2. (Depends on what’s the application you working for.)
b. CWDM Modules(Dual fiber): 16
c. MUX-DEMUX: 2
d. Patch cords: 32 & 1 testing patch cord(with an attenuator.)
e. Optical fiber: 1
Base on different applications, the solutions are different. It involved the switch type, MUX/DEMUX channel number, etc.
In a word, If you can tell us the project you are preparing(application), or where will the MUX/DEMUX(CWDM modules) be used, we can offer you the most suitable solution you need.

How to use optical patch cord correctly?

Both optical patch cord and optical transceiver have single mode / multimode. If the collocation is wrong when using, it will lead to the parameter error of the optical modules. How to match the use of patch cord and optical transceiver? Today, we will share the knowledge with you, hope that can will be helpful for you!
What are the differences between single mode and multimode optical modules?
The wavelength of single mode modules are 1310nm and 1550nm, transmission distance can up to 160KM. A metropolitan area network that is commonly used for long distance and relatively high transmission rates.
The wavelength of single mode modules is 850nm, transmission distance can only up to 2KM. Used in short-distance transmissions.
What are the differences between single mode and multimode optical optical fiber?
Single mode fiber transmission has high frequency bandwidth, long transmission distance and high cost; The core diameter is small, usually is 9/125um; Dispersion is small, allowing only one mode to transmit. Single mode optical fiber can transmit optical fiber directly to the center, generally used for long distance data transmission.
Multimode fiber has low transmission speed and short distance, but its cost is relatively low; With a larger diameter, usually is 50 or 62.5 um; The dispersion is large, hundreds of mode transmissions are allowed. Multimode fibers are often used in short distance data transmission.
Optical modules and patch cords must be properly matched for normal use. Below we will list the results of mashup.
If the optical fiber in the data center are all multimode, then you’d better use multimode optical modules, single mode and multimode can’t be mixed. Because the core diameter of single-mode fiber and multimode fiber is very different, it will cause too much loss when matching.
After reading this article, believe that you will have a certain understanding on how to match the patch cords and modules!