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by Juniper
Product Line: Juniper Series
Product Type: Optical Transceiver
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Original price $0.00 - Original price $0.00
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Product Description

The QSFPP-40GBASE-LR4 is a QSFP+ optics module designed for long-range data transmission over single-mode fiber (SMF), supporting a maximum data rate of 44.6Gbps with four lanes each operating at 11.2Gbps. It features a duplex LC connector and operates over wavelength ranges of 1264.5 nm to 1337.5 nm, using a DFB laser transmitter and PIN photodiode receiver, with a power budget of 4dB. The module ensures reliable performance across distances up to 10 km, with operating temperatures ranging from 0° C to 70° C and a maximum power consumption of 3.5 W.

FAQs for the QSFPP-40GBASE-LR4

  • What is the maximum data rate supported by the 40GE QSFP+ LR4 Pluggable Optics module?
    The 40GE QSFP+ LR4 supports a maximum data rate of 44.6 Gbps, distributed over 4 lanes, each running at 11.2 Gbps.
  • How does the 40GE QSFP+ LR4 module maintain signal integrity over longer distances?
    It utilizes DFB Laser transmitters across four wavelengths ranging from 1264.5 nm to 1337.5 nm and PIN photodiode receivers, enabling reliable data transmission up to 10 km on single-mode fiber.
  • What are the operating and storage temperature ranges for the 40GE QSFP+ LR4 module?
    Operating temperature ranges from 0° C to 70° C and storage temperature ranges from -40° C to 85° C.
  • Can the 40GE QSFP+ LR4 module be used with any fiber optic cable?
    It is designed for use with single-mode fiber (SMF) cables with a core/cladding size of 9/125 µm, utilizing duplex LC connectors for optimal performance.
  • What is the power consumption of the 40GE QSFP+ LR4 module?
    The module consumes a maximum of 3.5 Watts, making it energy-efficient for its performance level.
  • What are the transmitter and receiver types in the 40GE QSFP+ LR4 module?
    The module uses a Distributed Feedback (DFB) Laser transmitter and a PIN photodiode receiver for high-quality data transmission.
  • What are the minimum and maximum input power levels for the receiver in the 40GE QSFP+ LR4 module?
    The receiver can handle input power levels ranging from -13.7 dBm (minimum) to 2.3 dBm (maximum).
  • What is the Bit Error Ratio (BER) for the 40GE QSFP+ LR4 module, and why is it important?
    The module boasts a BER of 1E-12, indicating a very low error rate for data transmissions, crucial for maintaining data integrity and network reliability.
  • What is the power supply requirement for the 40GE QSFP+ LR4 module?
    It requires a +3.3V single power supply for operation.
  • What makes the 40GE QSFP+ LR4 module suitable for long-distance networking applications?
    Its design, incorporating DFB Laser transmitters and PIN photodiode receivers, along with support for up to 10 km on single-mode fiber and a power budget of 4dB, makes it ideal for extended reach networking needs.

Product Review

The Juniper QSFPP-40GBASE-LR4 optics module offers a maximum data rate of 44.6Gbps across four wavelengths, suitable for high-capacity data transmission over single-mode fiber with a reach of up to 10 km, ensuring compatibility with existing network infrastructure. However, its power consumption of 3.5 W might be a consideration for environments aiming for energy efficiency. Additionally, the module operates within a broad temperature range (0° C to 70° C), making it versatile for various deployment scenarios, though the upper limit may require additional cooling measures in hot climates.


The Juniper QSFPP-40GBASE-LR4 is a 40 Gigabit Ethernet pluggable optics module designed for long-range data transmission over single-mode fiber. This module is compatible with the QSFP+ form factor, making it suitable for high-density networking environments. It features a duplex LC connector, ensuring a secure and reliable physical connection for your networking infrastructure. Key specifications of the module include a wide range of transmitter wavelengths, spanning from 1264.5 nm to 1337.5 nm across four lanes, each transmitting data at a rate of 11.2Gbps for a cumulative bandwidth of 44.6Gbps. This bandwidth capacity facilitates high-speed data transfer, critical for data centers, enterprise networks, and high-performance computing applications. The module's transmitter output power ranges from a minimum of -7 dBm to a maximum of 2.3 dBm per lane, while the receiver can handle input power from -13.7 dBm to 2.3 dBm per lane, ensuring flexibility and robustness in various operational conditions. The core and cladding specifications of 9/125 µm are standard for single-mode fiber, offering low attenuation and high transmission speeds over distances up to 10 kilometers. This makes the module an ideal choice for campuses, data centers, and metropolitan area networks that require long-distance, high-speed connectivity. With a maximum power consumption of 3.5W, the QSFPP-40GBASE-LR4 is engineered for efficiency, minimizing operational costs and heat output in dense networking environments. It operates within a temperature range of 0° C to 70° C and can be stored in temperatures ranging from -40° C to 85° C, ensuring reliability and longevity in a wide range of environmental conditions. - The module employs a DFB laser transmitter and a PIN photodiode receiver, providing a high-quality, stable signal for reliable data transmission. - A Bit Error Ratio (BER) of 1E-12 guarantees error-free performance over the module's operational lifespan, ensuring data integrity and network reliability. - The unit requires a +3.3V single power supply, simplifying power management within the networking hardware architecture. The Juniper QSFPP-40GBASE-LR4 is engineered to meet the demands of modern network infrastructures, offering high-speed, long-distance connectivity with efficient power consumption and reliable performance. Its compatibility with QSFP+ ports allows for seamless integration into existing networks, making it a versatile solution for upgrading or expanding network capabilities. Whether deploying in data centers, enterprise networks, or for telecommunications infrastructure, the QSFPP-40GBASE-LR4 provides a high-performance, cost-effective solution for 40 Gigabit Ethernet connectivity.


Item NumberJuniper QSFPP-40GBASE-LR4
Module Type40Gbps QSFP+ LR4 Optical Module
Connection InterfaceLC Duplex Connector
Emission Wavelengths1264.5-1277.5 nm, 1284.5-1297.5 nm, 1304.5-1317.5 nm, 1324.5-1337.5 nm
Minimum Launch Power per Lane-7 dBm
Maximum Launch Power per Lane2.3 dBm
Lowest Receiver Sensitivity per Lane-13.7 dBm
Highest Receiver Sensitivity per Lane2.3 dBm
Fiber Core/Cladding Diameter9/125 µm
Link Distance Capability10 km
Peak Power Usage3.5 Watts
Minimum Operating Temperature0°C
Maximum Operating Temperature70°C
Lowest Storage Temperature-40°C
Highest Storage Temperature85°C
Bit Error Ratio1E-12
Maximum Throughput44.6 Gbps (4x11.2 Gbps)
Optical Budget4 dB
Power Requirements+3.3V DC
Laser SourceDFB Laser
Optical Fiber CompatibilitySingle Mode Fiber
Detector TypePIN Photodiode

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