H3C provides the QSFP-40G-LR4L-WDM1300 optical module, which supports 40G Ethernet transmission up to 2 km over single-mode fiber.
        Moduletek Laboratory has tested samples of this product to help users fully understand its performance specifications and actual application effect.
1. Product Introduction
        The H3C QSFP-40G-LR4L-WDM1300 optical module supports a 2 km link length over standard G.652 single-mode fiber (SMF) at 40G.
        Key official parameters and physical appearance are shown below:
Table 1 Official Key Parameters
External Model
Center Wavelength (nm)
Fiber Mode
Fiber Diameter (μm)
Transmission Distance
Interface Index (dBm)
Received Optical Power
Output Optical Power
QSFP-40G-LR4L-WDM1300
4 channels:
1271
1291
1311
1331
SMF
9/125
2km
-10~+2.3
-11.5~+2.3

H3C QSFP-40G-LR4L-WDM1300 optical module physical appearance
Figure 1 Physical Appearance of H3C QSFP-40G-LR4L-WDM1300
2. Module Identification on Switch
        The QSFP-40G-LR4L-WDM1300 module was installed into an H3C S6820-56HF L3 switch.
        The module established a normal LINK, and the port indicator remained steady on.
        The switch correctly identified complete module information including type, vendor name, part number, serial number, transmission rate and distance.
        DOM (Digital Optical Monitoring) data could be read normally, with all values within thresholds and no alarms.
Table 2 Module Recognition Information
Item
Information Read by Switch
Link
Identification
DOM Data
3. Key Parameter Performance Test
        Performance testing was conducted in a laboratory chamber with the module case temperature stabilized at 45°C.
        a. Optical Performance Test Results
Table 3 Measured Module Performance Parameters
Parameter
Channel 1
Channel 2
Channel 3
Channel 4
Remarks
  Transmit Optical Power (dBm)
-1.24
-0.41
-1.25
-0.78
 
  Receiving Sensitivity (without fiber) (dBm)
-13.76
-13.55
-13.65
-13.75
0 BER
  Receiving Sensitivity (with 2km fiber) (dBm)
-14.11
-13.61
-13.23
-13.86
0 BER
  Power Consumption (W)
2.729
        b. Optical Eye Diagram Test
        Eye diagram testing was performed at 45°C for all four channels.
Table 4 Eye Diagram Templates
Item
Eye Diagram
Item
Eye Diagram
Channel 1
Channel 3
Channel 2
Channel 4

Table 5 Eye Diagram Parameters
Parameter
Channel 1
Channel 2
Channel 3
Channel 4
Extinction Ratio (dB)
3.43
3.40
3.46
3.43
P-P Jitter (ps)
16.20
16.76
16.10
18.96
Rise Time (ps)
73.8
55.8
56.9
51.2
Fall Time (ps)
54.4
53.6
54.7
53.0
Margin Value (%)
36
42
45
50
        Based on actual test results, the key performance parameters and indicators of the module fully 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