Transceiver Optical Interface Specifications: Difference between revisions

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== Introduction ==
== Introduction ==


These are Tranceiver Optical Interface Specifications for the most common Network Standards.  ANY optical tranceiver that lists itself as compliant with the standard, MUST be able to operate correctly when the power of the optical signal at the receiver is in the range between Receiver Sensitivity and Receiver Saturation.  Transceivers by some vendors may perform better; resulting in higher limits for loss and length when using them on both ends of the link.
As an alternative to Fiber Optic Link Certification, you may consider measuring Optic Power of the signal at the receiver's end and compare those results with the tables below.


You may read these specifications as "worst case" values; under these circumstances the Network will work as specified by the Network Standard.
These are Transceiver Optical Interface Specifications for the most common Network Standards.  ANY optical tranceiver that lists itself as compliant with the standards, MUST be able to operate correctly when the power of the optical signal at the receiver fals in the range between Receiver Sensitivity and Receiver Saturation.  Transceivers by certain vendors may perform better, resulting in higher limits for loss and length.


These tabels will grow as we come accross the specification for other interface specifications.
These tabels will be updated we come accross specification for other interface types.


 
 
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{{#invoke:Message box|ambox |type=content|text=Always be very careful when operating optical networks. Infra-red radiation is invisible to the naked eye.}}
{{#invoke:Message box|ambox |type=content|text=Be extremely careful when when working with fiber optic links and interfaces. Infra-red radiation is invisible to the naked eye and could reach dangerous power levels, causing severe skin burns and permanent damage to the eyes.}}


 
 
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=== Permanent Damage ===
=== Permanent Damage ===


Receivers will be permanently damaged after exposure to an optical power of 5dBm or more.  This is OK, as Average Launch Powers is not higher than +4.0dBm. 
Most receivers used in enterprise networking will suffer permanent damaged when exposed to an optical power input of +5dBm or more. 
 
This should not be a problem, as Average Launch Power of an transmitter does not exceed +4.0dBm. 
 
 
 
=== Receiver Saturation ===
 
This is the  power level at which the receiver is no longer capable of decoding the signal received.  You could say that the receiver is "blinded" by the intense radiation of the transmitter at the far end. 
 
In such cases, you shoud switch to a receiver that is designed for the lenght of the link.  If this is impossibe - for example with very short single mode fiber optic links - consider the use of attenuators.
 
 
 
=== Receiver Sensitivity ===
 
This is the lowest level at which the receiver is capable of decoding the signal correcty. 
 
<span style="background-color:#FFFF00;">When measuring the optical power at the receiver end,&nbsp;the result shoud be in the range between&nbsp;receiver sensitivity and receiver saturation.</span>


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| -1.0
| -1.0
| -15.8
| -15.8
| 40km
| OS1/OS2: 40km
|-
|-
| 10GBASE-L and -LR
| 10GBASE-L and -LR
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| +0.5
| +0.5
| -14.4
| -14.4
| 10km
| OS1/OS2: 10km
|-
|-
| 10GBASE-LRM
| 10GBASE-LRM
| Multi-mode
| Multi-mode
| IEEE 802.3aq - 2006
| IEEE 802.3aq - 2006
| 1300
| 1310
| +1.5
| +1.5
| -6.5
| -6.5
|  
|  
OM3:
OM3:220m


OM4/OM5:
OM4/OM5: not specified


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|-
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| -9.9
| -9.9
|  
|  
OM3:
OM3: 300m


OM4/OM5:
OM4/OM5: 400m


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|-
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| -7.0
| -7.0
| -24.0
| -24.0
| 80km
| OS1/OS2: 80km
|}
|}
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&nbsp;


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{| align="left" border="1" cellpadding="1" cellspacing="1" style="width: 1400px;"
{| align="left" border="1" cellpadding="1" cellspacing="1" style="width: 1400px;"
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! scope="col" |  
! scope="col" | &nbsp;
! scope="col" | Optical interface
! scope="col" | Optical interface
! scope="col" | Standard
! scope="col" | Standard

Latest revision as of 12:29, 11 September 2023

Introduction

As an alternative to Fiber Optic Link Certification, you may consider measuring Optic Power of the signal at the receiver's end and compare those results with the tables below.

These are Transceiver Optical Interface Specifications for the most common Network Standards.  ANY optical tranceiver that lists itself as compliant with the standards, MUST be able to operate correctly when the power of the optical signal at the receiver fals in the range between Receiver Sensitivity and Receiver Saturation.  Transceivers by certain vendors may perform better, resulting in higher limits for loss and length.

These tabels will be updated we come accross specification for other interface types.

 

Solution

 

 

Permanent Damage

Most receivers used in enterprise networking will suffer permanent damaged when exposed to an optical power input of +5dBm or more. 

This should not be a problem, as Average Launch Power of an transmitter does not exceed +4.0dBm. 

 

Receiver Saturation

This is the  power level at which the receiver is no longer capable of decoding the signal received.  You could say that the receiver is "blinded" by the intense radiation of the transmitter at the far end. 

In such cases, you shoud switch to a receiver that is designed for the lenght of the link.  If this is impossibe - for example with very short single mode fiber optic links - consider the use of attenuators.

 

Receiver Sensitivity

This is the lowest level at which the receiver is capable of decoding the signal correcty. 

When measuring the optical power at the receiver end, the result shoud be in the range between receiver sensitivity and receiver saturation.

 

10 Gigabit Optical Interface Specifications

  Optical interface Standard Wavelength (nm) Receiver Saturation (dBm) Receiver Sensitivity (dBm) Maximum Distance rx--tx
10GBASE-E and -ER Single-mode IEEE 802.3ae - 2002 1550 -1.0 -15.8 OS1/OS2: 40km
10GBASE-L and -LR Single-mode IEEE 802.3ae - 2002 1310 +0.5 -14.4 OS1/OS2: 10km
10GBASE-LRM Multi-mode IEEE 802.3aq - 2006 1310 +1.5 -6.5

OM3:220m

OM4/OM5: not specified

10GBASE-S and -SR Multi-mode IEEE 802.3ae - 2002 850 -1.0 -9.9

OM3: 300m

OM4/OM5: 400m

10GBASE-Z and -ZR Single-mode Multivendor agreement 1550 -7.0 -24.0 OS1/OS2: 80km

 

 

 

 

 

 

 

 

 

40 Gigabit Optical Interface Specifications

  Optical interface Standard Wavelength (nm) Receiver Saturation (dBm) Receiver Sensitivity (dBm) Maximum Distance rx--tx
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