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Description
Features of QSFP-40G-LR4 Transceiver
- Supports 41.2Gbps aggregate bit rates
- Uncooled 4×10.3Gbps CWDM transmitter
- APD-TIA receiver
- Up to 40kmon SMF
- Duplex LC receptacles
- Hot pluggableQSFP+ form factor
- Power dissipation < 3.5W
- All-metal housing for superior EMI performance
- RoHS6 compliant (lead free)
- Operating case temperature: Commercial: 0ºC to +70°C
40GBASE LR4 Application
- Long Distance Data Center Interconnection (DCI): Connecting two data centers that are tens of kilometers apart to build a dual active or disaster recovery network.
- Extension of metropolitan area network and backbone network: Operators use long-distance uplink links from the aggregation layer to the core layer.
- Park and Campus Backbone: A super long backbone link that spans large parks such as university towns and industrial zones.
Transceiver Standards
- Compliant with SFF-8436
- Compliant with SFF-8636
- Compatible with IEEE802.3bm
Optical Parameters
| Parameter | Symbol | Min. | Typical | Max. | Unit | Note |
| Transmitter Section | ||||||
| Lane Centre Wavelength (range) | λ0 | 1264.5 | 1271 | 1277.5 | nm | |
| λ1 | 1284.5 | 1291 | 1297.5 | nm | ||
| λ2 | 1304.5 | 1311 | 1317.5 | nm | ||
| λ3 | 1324.5 | 1331 | 1337.5 | nm | ||
| Spectral Width (-20dB) | Δλ | 1 | nm | |||
| Side Mode Suppression Ratio | SMSR | 30 | dB | |||
| Average Optical Power per Lane | Pout | -2.7 | +4.5 | dBm | 1 | |
| OMA Power per Lane | OMA | 0.3 | 5.0 | dBm | 1 | |
| Laser Off Power per Lane | Poff | – | – | -30 | dBm | |
| Extinction Ratio | ER | 5.5 | – | – | dB | 2 |
| Relative Intensity Noise | RIN | – | – | -128 | dB/Hz | |
| Optical Return Loss Tolerance | – | – | 20 | dB | ||
| Transmitter eye mask definition {X1, X2, X3, Y1, Y2, Y3} | {0.25, 0.4, 0.45, 0.25, 0.28, 0.4} | 2 | ||||
| Receiver Section | ||||||
| Lane Center Wavelength (range) | λ0 | 1264.5 | 1277.5 | nm | ||
| λ1 | 1284.5 | 1297.5 | nm | |||
| λ2 | 1304.5 | 1317.5 | nm | |||
| λ3 | 1324.5 | 1337.5 | nm | |||
| Average Receiver Power per Lane | RXPX | -21.2 | -4.5 | dBm | 3 | |
| OMA Sensitivity per Lane | RXsens | -19 | dBm | 3 | ||
| Los Assert | LOSA | -30 | – | – | dBm | |
| Los Dessert | LOSD | – | – | -20 | dBm | |
| Los Hysteresis | LOSH | 0.5 | – | 5 | dB | |
| Overload per Lane | Pin-max | – | – | -4.5 | dBm | 3 |
| Receiver Reflectance | – | – | -26 | dB | ||
| Damage Threshold per Lane | – | – | 3.8 | dBm | ||
Notes:
- The optical power is launched into 9/125µm SMF.
- Measured with a PRBS 231-1test pattern @10.3125Gbps.
- Measured with a PRBS 231-1test pattern @10.3125Gbps, ER=4dB, BER <10-12.
Mechanical Dimension
Ordering Information
| Part Number | Product Description |
| QSFP-40G-ER4 | 40Gbps QSFP+ ER4, 40km on SMF, 0ºC ~ +70ºC, With DDM. |
