Drop-in upgrades from 10G to 100G have been limited to conventional duplex fiber scenarios. Single fiber upgrades of 10G bidirectional links to 100G now have options to upgrade bandwidth on existing fiber infrastructure.
The 100G bidirectional transceivers from ProLabs represent a breakthrough in single-mode fiber architectures. Thanks to our extensive selection of QSFP28 100G Bidis we can provide single fiber 100G connectivity for links up to 20km.
The latest addition to the family is our 20km QSFP28 LR1 Bidi, offering 100G services with a reach of up to 20km over a single fiber.

QSFP28 100G LR1 Bidi 20km
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MSA and TAA 100GBase-BX LR1 PAM4 QSFP28 Transceiver Single Lambda (SMF, 1311nmTx/1291nmRx, 20km, LC, DOM) | SKU: Q28-100GP4-BXD3129-20-C |
MSA and TAA 100GBase-BX LR1 PAM4 QSFP28 Transceiver Single Lambda (SMF, 1291nmTx/1311nmRx, 20km, LC, DOM) | SKU: Q28-100GP4-BXU2931-20-C |
Cisco® Compatible TAA 100GBase-BX LR1 PAM4 QSFP28 Transceiver Single Lambda (SMF, 1311nmTx/1291nmRx, 20km, LC, DOM) | SKU: Q28-100GP4-BXD3129-20-C-C |
Cisco® Compatible TAA 100GBase-BX LR1 PAM4 QSFP28 Transceiver Single Lambda (SMF, 1291nmTx/1311nmRx, 20km, LC, DOM) | SKU: Q28-100GP4-BXU2931-20-C-C |
Arista Networks® Compatible TAA 100GBase-BX LR1 PAM4 QSFP28 Transceiver Single Lambda (SMF, 1311nmTx/1291nmRx, 20km, LC, DOM) | SKU: Q28-100GP4-BXD3129-20-AR-C |
Arista Networks® Compatible TAA 100GBase-BX LR1 PAM4 QSFP28 Transceiver Single Lambda (SMF, 1291nmTx/1311nmRx, 20km, LC, DOM) | SKU: Q28-100GP4-BXU2931-20-AR-C |
Juniper Networks® Compatible TAA 100GBase-BX LR1 PAM4 QSFP28 Transceiver Single Lambda (SMF, 1311nmTx/1291nmRx, 20km, LC, DOM) | SKU: Q28-100GP4-BXD3129-20-J-C |
Juniper Networks® Compatible TAA 100GBase-BX LR1 PAM4 QSFP28 Transceiver Single Lambda (SMF, 1291nmTx/1311nmRx, 20km, LC, DOM) | SKU: Q28-100GP4-BXU2931-20-J-C |
Features & Benefits:
- Single lambda 100G 1291/1311nm & 1311/1291nm Bidi solution with reach up to 20km.
- Standard point-to-point Bidi with upstream 1291nm & downstream 1311nm.
- Performance over operating temperatures ranging from 0°C to 70°C.
- Avoid long lead times and backorders with our U.S.- & U.K.-based stock and fast shipping.
- U.S. & U.K. originated, coded, and tested optics solve your network challenges without hassle.
QSFP28 100G LR1 Bidi ITEMP
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MSA and TAA 100GBase-BX QSFP28 Transceiver Single Lambda (SMF, 1331nmTx/1271nmRx, 10km w/FEC, LC, DOM, -40 to 85C) | SKU: Q28-100GP4-BXD3327-10-I-C |
MSA and TAA 100GBase-BX QSFP28 Transceiver Single Lambda (SMF, 1271nmTx/1331nmRx, 10km w/FEC, LC, DOM, -40 to 85C) | SKU: Q28-100GP4-BXU2733-10-I-C |
Cisco® Compatible TAA 100GBase-BX QSFP28 Transceiver Single Lambda (SMF, 1331nmTx/1271nmRx, 10km w/FEC, LC, DOM, -40 to 85C) | SKU: Q28-100GP4-BXD3327-10-I-C-C |
Cisco® Compatible TAA 100GBase-BX QSFP28 Transceiver Single Lambda (SMF, 1271nmTx/1331nmRx, 10km w/FEC, LC, DOM, -40 to 85C) | SKU: Q28-100GP4-BXU2733-10-I-C-C |
Arista Networks® Compatible TAA 100GBase-BX QSFP28 Transceiver Single Lambda (SMF, 1331nmTx/1271nmRx, 10km w/FEC, LC, DOM, -40 to 85C) | SKU: Q28-100GP4-BXD3327-10-I-AR-C |
Arista Networks® Compatible TAA 100GBase-BX QSFP28 Transceiver Single Lambda (SMF, 1271nmTx/1331nmRx, 10km w/FEC, LC, DOM, -40 to 85C) | SKU: Q28-100GP4-BXU2733-10-I-AR-C |
Juniper Networks® Compatible TAA 100GBase-BX QSFP28 Transceiver Single Lambda (SMF, 1331nmTx/1271nmRx, 10km w/FEC, LC, DOM, -40 to 85C) | SKU: Q28-100GP4-BXD3327-10-I-J-C |
Juniper Networks® Compatible TAA 100GBase-BX QSFP28 Transceiver Single Lambda (SMF, 1271nmTx/1331nmRx, 10km w/FEC, LC, DOM, -40 to 85C) | SKU: Q28-100GP4-BXU2733-10-I-J-C |
Features & Benefits:
- Single lambda 100G Bidi solution with downstream 1331nm & upstream 1271nm.
- Performance over industrial temperatures ranging from -40°C to +85°C.
- First to market OEM compatible solution for service provider and campus networks.
- Avoid long lead times and backorders with our U.S.- & U.K.-based stock and fast shipping.
- U.S. & U.K. originated, coded, and tested optics solve your network challenges without hassle.
QSFP28 100G LR1 Bidi
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MSA and TAA Compliant 100GBase-BX QSFP28 LR1-Bidi Transceiver (SMF, 1331nmTx/1271nmRx, 10km, LC, DOM, with FEC) | SKU: Q28-100GP4-BXD3327-10-C |
MSA and TAA Compliant 100GBase-BX QSFP28 LR1-Bidi Transceiver (SMF, 1271nmTx/1331nmRx, 10km, LC, DOM, with FEC) | SKU: Q28-100GP4-BXU2733-10-C |
Juniper Networks® 100GBase-BX QSFP28 LR1-Bidi Transceiver (SMF, 1331nmTx/1271nmRx, 10km, LC, DOM, with FEC) | SKU: Q28-100GP4-BXD3327-10-J-C |
Juniper Networks® 100GBase-BX QSFP28 LR1-Bidi Transceiver (SMF, 1271nmTx/1331nmRx, 10km, LC, DOM, with FEC) | SKU: Q28-100GP4-BXU2733-10-J-C |
Cisco® Compatible 100GBase-BX QSFP28 LR1-Bidi Transceiver (SMF, 1331nmTx/1271nmRx, 10km, LC, DOM, with FEC) | SKU: Q28-100GP4-BXD3327-10-C-C |
Cisco® Compatible 100GBase-BX QSFP28 LR1-Bidi Transceiver (SMF, 1271nmTx/1331nmRx, 10km, LC, DOM, with FEC) | SKU: Q28-100GP4-BXU2733-10-C-C |
Features & Benefits:
- Achieve a 100G data rate over a single fiber.
- Up to 10km reach over a single-mode fiber using one PAM4 to minimize point of failures compared to a 4-lane standard part.
- First to market OEM compatible solution with full compatibility of our switches & routers.
- Avoid long lead times and backorders with our U.S.- & U.K.-based stock and fast shipping.
- U.S. & U.K. originated, coded, and tested optics solve your practical network challenges without hassle.
QSFP28 100G CWDM4 Bidi
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MSA and TAA Compliant 100GBase-BX CWDM4 QSFP28 Transceiver (SMF, 1270nm to 1330nm, 2km, LC, DOM) | SKU: Q28-100G-CWDM4-BX-C |
Cisco Compatible 100GBase-BX CWDM4 QSFP28 Transceiver (SMF, 1270nm to 1330nm, 2km, LC, DOM) | SKU: Q28-100G-CWDM4-BX-C-C |
Juniper Compatible 100GBase-BX CWDM4 QSFP28 Transceiver (SMF, 1270nm to 1330nm, 2km, LC, DOM) | SKU: Q28-100GP4-BXU2733-10-J-C |
Features & Benefits:
- CWDM4 Bidi signals from 1270nm to 1330nm (same as standard dual-fiber CWDM4).
- Easily double the number of connections using the same fiber infrastructure.
- 100% in-environment compatibility coded & tested in popular OEM switches & routers.
- Avoid long lead times and backorders with our U.S.- & U.K.-based stock and fast shipping.
- U.S. & U.K. originated, coded, and tested optics solve your network challenges without hassle.