Questions tagged [optics]
For questions relating to fiber-optic connectors and transceivers.
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Optical switch and packet generation
I am building a testbed in the lab which at its core has an optical switch. The input and output from this switch are MTP ports. I am looking for the simplest/cheapest way to test that the optical ...
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2
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Can wrong SFP module damage equipment?
SFP modules convert electrical data from the equipment to optical signals. There is no incoming power surging from an optical port to damage the equipment according to my undarstanding of fibre optics....
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How can GMPLS unify signalization plain of all telecommunications network technologies?
In what way can GMPLS do that unification of signalization of network technologies, by hardware, like MPLS switches, or by network protocols? And what is the role of optical networks in GMPLS? Are ...
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Single-Mode Fiber Optics
I am learning for CCNA. The textbook says that a switch port costs more for single-mode optic fiber than for multi-mode fiber.
I guessed this is because the light source in the interface component ...
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Is there a difference between BIDI LR and DFB BiD or are they compatible?
My ISP is offering 25GBit Fiber soon and I am looking into the required hardware. One of the devices I will need to purchase is a new transceiver that can handle the speeds.
The one my ISP recommends ...
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Duplex SFP via one single mode fiber [duplicate]
Is that possible to use duplex SFP which will send and receive signals over only one fiber in backbone? Please refer to the picture.
If so, then how the termination of patchcords and backbone's fiber ...
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6
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Can a pair of matching WDM transceivers be connected directly?
In fiber optic networks, I understand CWDM technology can multiplex multiple optical signals onto a pair of fibers (or a single one).
But can a single pair of CWDM transceivers be connected directly ...
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Small Form-factor Pluggable(SFP): basic , connection with 2.SFP
**My understanding of SFP functionality. **
SFP is an “interface” between 2 parts of a device.
SFP is a transceiver There are input and output, electrical to optical or optical to electrical. SFP ...
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Underground fiber installation terminologies
I am analyzing some documents from the city containing comments about underground network equipment installation. One of the comments that appear a lot is "MH ACCESS - ROD ROPE AND PLACE IPP"...
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2
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SFP+ 10GBASE-LR and attenuator
This picture is a part of the Intel E10GSFPLR (SFP+, Long Reach) datasheet. Can I use them in a short link (less than 1 meter) without any attenuator? Which numbers are important in this datasheet to ...
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What is the difference between LR1 and LR4 optics?
Does anyone know what's the difference between LR1 and LR4 optics?
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Why do higher speed links require a stronger signal?
I understand that higher-speed optical links require a stronger signal. For example, 16 Gbps Fibre Channel transceivers have to transmit at -1.3 dBm and receive at -10.3 dBm. If it falls below that, ...
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10G Interface on Juniper MX Stops Transmitting Output Optical Power
We have been facing an issue on Juniper MX series router. We have 10G interface on our router. Its does not matter whether interface is connected to DWDM or interface itself is a dark fiber. The end ...
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Is configuring FEC mandatory in designing 100G networks? What's the difference FEC makes with DACs vs optics?
I have read a lot of information online but I am still not sure when do we exactly configure FEC and what are the advantages/disadvantages of configuring it. Does DAC transceivers always need FEC to ...
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Using XFP-10G (120 KM Range) on Juniper MX routers
Hi everyone,
We recently installed a new 10G XFP optics module in Juniper MX router. As per the customer , XFP supported range is 120 KM and it is from some third party vendor named 'menara'.
Menara ...
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Is there a way to know the length of the cable used between the connected SFPs on a switching/routing device?
I have connected two Juniper routers with a QSFP28 optics and I need to find out the length of the optical cable I have used. Is there a command to check that in the router?
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How does "bits per second" relate to wavelength?
I'm learning about optical networking at a new job, and am confused by some introductory terminology. I'm pondering this statement:
There is typically one transponder for every client signal and SFP ...
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10G SFP+ transceiver with OM4 fiber cable - Maximum cable length?
I can't find 10Gb SFP+ transceivers supporting cable length over 300mt (we need 400/500mt) is there a standard/physical limit on this, or such transceivers, with extended length support, do exist?
We'...
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SFP-10G-LRM compatible with Single Mode Fiber?
I just started working with new company and found they are using SFP-10G-LRM with single mode fiber. How could this be? I thought since the SFP-10G-LRM is Multimode, it can't work with single mode ...
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Macsec and Optics
Do Macsec have any bearing with respect to optics? Wanted to understand, if Macsec is enabled, will the optics perform any additional task or they are transparent and it doesn’t bother if Macsec is ...
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what is pump conversion efficiency?
I am reading an article about Optical Fiber amplifier and i saw the term pump conversion efficiency. Do you know what this mean ?
I have seen on the internet that energy conversion efficiency is the ...
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Optical fibers out of service
We just got multiple new optical fibers out of service on our infrastructure, does a bad equipment or a too high signal could break an optical fiber silica or could cause any others issues ?
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Do low temperatures cause problems installing new optical wiring or fixing broken optical cables by splicing?
One of our supplier reported big problems splicing (using this) a broken outdoor optical fiber cable when temperatures around or little bellow freezing point. They refuse to install new optical fiber ...
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Latency of AOC vs passive DAC
Long time ago I heard from friend that on really short distance using optical links makes no much sense because comparing to passive connection optical interfaces introduce another layer of hardware ...
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What certifications are there for Fiber Optic termination and splicing?
As a knowledgeable person in computer networks I have always had an itch for learning how to create custom-length fiber optic cables. So, as a personal goal, I want to get trained and certified in ...
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Can one optical fibre transmit multiple networks
Can a single optic fibre installation transmit multiple connections,
For example, There are two networks, each network sends and receives data to or from. My question is can both the two networks be ...
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What is the purpose of defect limit in Zone D in criteria for MM‐PC Connectors (IEC 61300‐3‐35)
Zones in IEC 61300‐3‐35 are defined as shown on this picture.
However the optical signal is transmitted by the Zone A - Core.
Light is transmitted and retained in the “CORE” of the optical fiber
...
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Power at the terminals of a PLC fiber optic splitter
I have a 1xN PLC fiber optic splitter which works like this:
The optical power of the incoming signal is P; the power in each outgoing cable is P/N.
I want to use the splitter as a combiner.
If the ...
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Need an estimate of the max power density
Here is an image of a 1x64 fiber optic splitter/combiner:
I am assuming these are plastic/polymer fibers. A very similar box (http://www.ebay.co.uk/itm/SC-UPC-1x32-Fiber-Optic-Splitter-PLC-Splitter-...
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detect SFP transmit wavelength
Let's say there is a no-name SFP transceiver without a label and without DDM support. Is there a device which is able to detect on what wavelength this SFP transmits? I have used JDSU light-meters ...
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SFP+ transceiver's ability to do 1GbE
I understand that most ports that support SFP+ transceivers can step down to allow an SFP to be plugged into it, but my question is around the transceivers/optics themselves. Can an SFP+ transceiver ...
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Cisco Digital Optical Monitoring Command
Can some tell me what for monitoring optical power on my 7200 series router .
The interface has a SFP 1000BASE-LX.
sh int gig0/0 transceiver ,doesnt give me the required information( Optical power in ...
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Power Budget Based on Miniums?
I'm currently looking at 40Gbase-LR and am curious about the advertised power budget. Here are the specifications:
Transmit max 2.30dBm
Transmit min -7.00dBm
Receive max 2.30dBm
Receive ...
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Doubt about MMF and SMF speed
I have a doubt about MMF and SMF cables. If MMF can handle more than one signal light at the same time and both MMF and SMF support full-duplex, why isn't MMF faster than SMF cable?
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How many 3 dB couplers are needed to construct a 16 way fiber optic splitter?
Wikipedia says we need 31 couplers. Can't we do it with 8 couplers?
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Is it possible to permanently damage optical transceiver if Rx signal is too strong?
Data sheets of optical transceivers often specify the receiver maximum input power. In addition, non-volatile memory of transceivers often seem to hold this data:
root@MX240> show interfaces ...
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How to connect two networks via fiber optics (LC Connectors)
I have the following situation.
There is a ethernet network on the 10th, we want to expand it to the 5th.
We hired somebody, they setup the patchbox and the cables in the 5th to each office. They ...
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4
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Can I use an OM3 fiber optics cable on 1gb transceiver J4858C?
I have this multimode transceiver product:
http://www8.hp.com/h20195/v2/gethtml.aspx?docname=c04168409&search=J4858C
I am going to use it on the following switch:
http://www8.hp.com/h20195/v2/...
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How can I find what optic is in an interface for a Juniper MX-series router?
As the title states, how can I see what optic I have installed in an interface for an MX router?
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Using a G. 655 with a G. 652.D fiber cable?
Is it possible to use a G.652.D with a G.655 fiber for just a small distance (less than 10 m) for the interconnect only (from the patch panel to the switch) ? If yes or no, what will happen ?
And for ...
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Difference between LR and ZR 10Gb Optics
What is the difference between a 10Gb LR optic that can only go 10km compared to a ZR optic that can go a lot further at 70km?
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cheaper 40gb optics/uplinks?
I'm pricing out a decent size 10gb network (6-8 ToR switchs) and the uplink costs are a major factor.
I figure each ToR switch needs 4x40gb uplinks and you have a cost for the uplink optics that is ...
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