Kramer OSP SFP+ Specification sheet

Technical Note
KRAMER ELECTRONICS, Ltd.
E-mail: [e-mail]
Web: www.kramerav.com
Subject:
Optical Fiber Extender Reach Calculations
Product Name:
Products with Optical Fiber Modules
Technical Note Date:
August 25, 2021
Using the OSP SFP+ Module
By default, OSP SFP+ is already inserted into all Kramer optical products.
Kramer offers both duplex and simplex transceiver modules as specified below.
Duplex (dual-fiber strand) modules:
•OSP-MM1: Optical MM 850nm 10G SFP+ Transceiver (usually included in the package).
•OSP-SM10: Optical SM 1310nm 10G SFP+ Transceiver (can be purchased separately).
Simplex (single-fiber strand) module:
•OSP-SM10S: Optical SFP+ Transceiver Pair over 10G 1270/1330nm Simplex SM Fiber (can be
purchased separately).
Replacing the OSP SFP+ Modules
Before deciding to replace the default SFP+ transceiver, consider the infra-structure of the
installation area, the desired distance, optical loss budget and typical expected loss.
When replacing the optical transceivers, use compatible SFP+ optical transceiver
modules on both extender paired end-point units.
Notes on Connecting the OSP SFP+ Modules
OSP-MM1 and OSP-SM10 modules are designed to be used only with LC(UPC) blue
or LC(PC) white connectors. Using an LC(APC) green connector with the module
causes poor performance and can damage the module connector.
For all other cable connections that do not connect directly to the OSP-MM1 or
OSP-SM10 modules, such as the optical patch panel and bulk cables illustrated
below, we recommend using Angled Physical Contact (APC) green connectors for
improved end-to-end reach performance.
When using OSP modules consider the following:
•Modules are Class 1 Laser products.
•There may be Invisible laser radiation present.
•Avoid long-term viewing of laser.
•Avoid the use of magnifying viewing aids or instruments (such as binoculars,
telescopes, microscopes and magnifying lenses, but not spectacles or contact lenses).
•Avoid placing optical devices in the emitted beam that could cause the concentration of
the laser radiation to be increased.

Technical Note
KRAMER ELECTRONICS, Ltd.
E-mail: [e-mail]
Web: www.kramerav.com
Optical Reach Evaluation
The following table defines various typical Fiber cable characteristics, used for optical reach
evaluation:
Cable Category
Core Diameter
[µm]
Wavelength
Fiber Loss
[dB/km]
Connector Loss
[dB]
Splice Loss
[dB]
MM OM1 [G.651.1]
62.5/125
850nm
3
Typical: 0.3
Max.: 0.75
0.3
MM OM2 [G.651.1]
50/125
MM OM3 [G.651.1,
Laser Optimized]
2.5
MM OM4 [G.651.1,
Laser Optimized]
MM OM5
SM OS1 [G.652A/B]
8
1310nm
1
SM OS2 [G.652C/D]
0.4
The following examples show how to calculate dB loss during optical signal transmission
over fiber optical infrastructure.
In this optical system layout example:
•Both Optical Product transmitter and receiver are connected to a patch panel via 100m patch
cords.
•There are 6 connectors and no splices.
System Layout Example for Optical Reach Evaluation
For multi-mode lines (MM OM3 cable category, as defined in the table above):
•Maximum loss budget is: 8.6dB.
•Typical loss per connector is 0.3dB.
•Typical loss for each patch cord (100m) is 0.25dB.
•Fiber-optic loss is 2.5 dB/km.

Technical Note
KRAMER ELECTRONICS, Ltd.
E-mail: [e-mail]
Web: www.kramerav.com
Multi-mode bulk line budget is: 8.6 –(0.3x6 +0.25x2) = 6.3dB.
Evaluated bulk line length is: 6.3/2.5=~2.5km.
For single-mode lines (SM OS1 cable category, as defined in the table above):
•Maximum loss budget is: 11.9dB.
•Typical loss per connector is 0.3dB.
•Typical loss for each patch cord (100m) is 0.1dB.
•Fiber-optic loss is 1 dB/km.
Single-mode bulk line loss budget is: 11.9 –(0.3x6 +0.1x2) = 9.9dB.
Evaluated bulk line length is: 9.9/1=~9.9km.