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Juniper NP-SFP-25G-SR Optical Module Sample Test Report

Time: 2024-01-03
        Juniper provides the JNP-SFP-25G-SR (P/N: 740-068639) optical module, which supports 25G Ethernet transmission up to 100 m over multimode fiber.
        Moduletek Laboratory has tested samples of this module to help users better understand its performance specifications and real‑world operation effect.
1. Product Description
        The Juniper JNP-SFP-25G-SR optical module supports a link length of 100 m over standard 25G multimode fiber (MMF, 50/125 μm) with FEC negotiation enabled by the host device.
        Official key parameters and physical appearance are shown below:
Table 1 Official Key Parameters
Part Number
740-068639
Speed
25 Gigabit Ethernet
Product Type
Optical Transceiver
Transmitter wavelengths ( range )
840 nm to 860 nm
Transmitter output power , each lane ( minimum )
-8.4 dBm
Transmitter output power , each lane ( maximum )
2.4 dBm
Receiver input power , each lane ( minimum )
-10.3 dBm
Receiver input power , each lane ( maximum )
2.4 dBm
Cable type
MMF
Core size / cladding
50/125 μm
Fiber grade
OM3                           OM4
Effective modal bandwidth
2000 MHz x km         4700 MHz x km
Distance
70 m                           100 m
Maximum Power consumption ( W )
1.5 W

JUNIPER JNP-SFP-25G-SR optical module physical appearance
Figure 1 Physical Appearance
2. Module Identification & On‑Switch Performance
        The JNP-SFP-25G-SR module was installed into a Juniper QFX5200-48Y switch with a patch cord connected.
        • The module established a normal LINK, and the port indicator lit up steadily.
        • The switch correctly recognized module information including module type and vendor part number.
        • DOM (Digital Optical Monitoring) data could be read normally, with all values within the threshold range and no alarms.
Table 2 Module Recognition Status
Item
Information Read by Switch
LINK
Identification
DOM Data
3. Key Parameter Testing
      a. Optical Performance Test
        Performance testing was conducted on a test bench with the module enclosure stabilized at 45°C in the laboratory.
        Test results are as follows:
Table 3 Measured Performance Indicators
  Parameter
Test Data
Unit
Remarks
  Transmit Optical Power
-1.15
dBm
 
  Receiving Sensitivity (without fiber)
-13.9
dBm
5E-5 BER
  Receive Sensitivity (with 100m OM4 fiber)
-11.2
dBm
5E-5 BER
  Power Consumption
0.831
W
 
      b. Optical Eye Diagram Test
        Eye diagram testing was performed at a module enclosure temperature of 45°C.
JUNIPER JNP-SFP-25G-SR Optical Module Eye Diagrams
Figure 2 Optical Module 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
4.32
11.94
16.56
19.44
35.2
        Based on actual test results, the key performance parameters of the module are consistent with Juniper’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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