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H3C SFP-25G-SR-MM850 Optical Module Sample Test Report

Time: 2024-01-03
        H3C offers the SFP-25G-SR-MM850 optical module, which supports 25G Ethernet transmission up to 100 m over multimode fiber. Moduletek Laboratory has tested samples of this product to help users better understand its performance specifications and actual on-board application effect.
1. Product Overview
        The H3C SFP-25G-SR-MM850 optical module operates over standard 25G 50/125 μm multimode fiber (MMF), and supports a link length of 100 m when FEC negotiation is enabled on the host device.
        The official key parameters and physical appearance of the module are as follows:
Table 1 Key Parameters
Module/Cable Name
Center Wavelength (nm)
Module Interface Connector Type
Interface Cable Specification
Mode Bandwidth (MHz * km)
Maximum Transmission Distance
Interface Specifications (dBm)
Output Optical Power
Received Optical Power
SFP-25G-SR-MM850
850
LC
50/125μm multimode fiber
2000
With FEC negotiation disabled : 30m
With FEC negotiation on : 70m
8.4~+2.4
-10.3~+2.4
4700
When FEC negotiation is turned off : 40m
With FEC negotiation on : 100m

Physical appearance of H3C SFP-25G-SR-MM850 optical module
Figure 1 Physical Appearance
        The SFP-25G-SR-MM850 module was installed into an H3C S6850-56HF switch and connected with a fiber patch cord.
        The module established a normal LINK, and the port indicator lit up steadily.
        The switch correctly identified module information including module type, vendor name, connector type, center wavelength, transmission distance, etc.
        DOM data could be read normally, with all parameters within the threshold range and no alarms triggered.
Table 2 On-Board Identification
Item
Information Read by Switch
LINK
Identification
DOM Data
3. Key Module Parameter Testing
        Tests were performed in the laboratory with the module enclosure temperature stabilized at 45°C.
a. Optical and Power Consumption Performance
Table 3 Performance Indicators
  Parameter
Test Data
Unit
Remarks
  Transmit Optical Power
0.2
dBm
 
  Receiving Sensitivity (without fiber)
-12.3
dBm
5E-5 BER
  Receive Sensitivity (with 100m OM4 fiber)
-10.2
dBm
5E-5 BER
  Power Consumption
0.75
W
 
b. Optical Eye Diagram Test
        Optical eye diagram testing was conducted at a module enclosure temperature of 45°C.
H3C SFP-25G-SR-MM850 Optical Module Eye Diagrams
Figure 2 Optical Eye Diagrams

Table 4 Eye Diagram Parameters
Temperature (°C)
Extinction Ratio (dB)
P-P Jitter (ps)
Rise Time (ps)
Fall Time (ps)
Margin Value (%)
45
4.09
12.30
17.22
19.98
30.5
        Based on actual laboratory measurements, the key performance parameters of the module comply with H3C’s official specifications.
        Moduletek Limited is at your service.
        For further inquiries about the above content, please contact us at: sales@moduletek.com
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