100G BiDi QSFP28 ER1 40km Transceiver (Side A): BIDI-100G-Q28-SL42A
100G BiDi QSFP28 ER1 40km Transceiver (Side A) Overview
The BIDI-100G-Q28-SL42A is a 100G single-lambda BiDi QSFP28 transceiver for 40 km links over a single strand of G.652 single-mode fiber. It transmits at 1304.58 nm and receives at 1309.14 nm, the Side A direction of the matched pair, and connects through a single LC/UPC simplex connector. Side A operates only against Side B (BIDI-100G-Q28-SL42B), which uses the complementary wavelengths. Order one of each to build a complete 40 km BiDi link.
- Media Type: Single-Mode Fiber (SMF)
- Connector: Single LC/UPC
- Fiber Count: BiDi
- Maximum Distance: 40 km
- Average Link Budget: 17.7 dB
- Tx Wavelength: 1310 nm
- Supported Data Rate: 106.25 Gbps
- DDM/DOM: Supported
- Forward Error Correction (FEC): Integrated in DSP
- Temperature Range: Standard 0°-70°C
100G BiDi QSFP28 ER1 40km Pricing
SKU:BIDI-100G-Q28-SL42A
In Stock - Ships Next Business Day100G BiDi QSFP28 ER1 40km Transceiver (Side A) Specification
Form Factor | QSFP28 |
Modulation | PAM4 (Pulse Amplitude Modulation 4-level) |
Media Type | Single-Mode Fiber (SMF) |
Connector | Single LC/UPC |
Fiber Count | BiDi |
Maximum Distance | 40 km |
Average Link Budget | 17.7 dB |
TX Wavelength | 1304.58 nm |
RX Wavelength | 1309.14 nm |
Supported Data Rate | 106.25 Gbps |
Supported Ethernet Applications | 100G Ethernet PAM4 (106.25 Gbps) |
DDM/DOM | Supported |
Forward Error Correction (FEC) | Integrated in DSP |
CDR (Clock and Data Recovery) chip | Supported |
Transmitter Type | EML Laser |
Tx Wave Bandwidth | 1.04 nm |
Average Launch Power (Min) Each Lane | 0 dBm |
Average Launch Power (Max) Each Lane | 5.6 dBm |
Extinction Ratio (Min) | 5 dB |
Receiver Type | PIN photodiode |
RX Wave Bandwidth | 1.04 nm |
Average Receiver Sensitivity (Min) Each Lane | -14.7 dBm |
Average Receiver Sensitivity (Max) Each Lane | -3.4 dBm |
Receiver Overload | -2.4 dBm |
Temperature Range | Standard 0°-70°C |
Storage Temperature | -40° to 85°C |
Relative Humidity | 5 to 85% |
Power Consumption (Max) | 4.5 W |
Power | +3.3V single power supply |
Compliance | CE, RoHS, IEEE 802.3cu, 100G Lambda MSA, CAUI-4, SFF-8636 (Management Interface for 4-lane modules), SFF-8679 |
100G BiDi QSFP28 ER1 40km Transceiver (Side A) Datasheet
v2Complete technical specifications and product details
100G BiDi QSFP28 ER1 40km Transceiver (Side A) Description
The BIDI-100G-Q28-SL42A is EdgeOptic's 100G single-lambda BiDi QSFP28 transceiver for 40 km links over one strand of G.652 single-mode fiber. It is the Side A end of a matched pair, transmitting at 1304.58 nm and receiving at 1309.14 nm. A single LC/UPC simplex connector carries both directions on the one fiber, so the link plant uses a single strand instead of the two-fiber duplex pair a conventional LR4 module needs.
The module runs 100G Ethernet at 106.25 Gbps using PAM4 on a single optical lane per direction. The 40 km reach is 100G-ER1-40 per the 100G Lambda MSA, which extends the single-lambda 100G specification beyond the 2 km FR1 and 10 km LR1 reaches that IEEE 802.3cu defines. Host-side electrical signaling is single-lambda PAM4 per IEEE 802.3cu (CAUI-4). It carries 100G Ethernet only, with no Fibre Channel or OTN mapping.
Side A transmits on 1304.58 nm and Side B (BIDI-100G-Q28-SL42B) transmits on 1309.14 nm. Each end receives on the wavelength the other transmits, so the two close O-band lanes pass each other on the single fiber without colliding. You must deploy Side A against Side B. Two Side A modules on opposite ends both transmit at 1304.58 nm with neither receiver tuned to listen for it, and the link stays dark. Order one BIDI-100G-Q28-SL42A and one BIDI-100G-Q28-SL42B per link.
The EML transmitter runs at 0 to +5.6 dBm launch power, paired with a PIN photodiode receiver rated to −14.7 dBm sensitivity (min) and a −2.4 dBm overload. The 17.7 dB average link budget supports the full 40 km over G.652 fiber. FEC is integrated in the module DSP. Whether host-side FEC should be enabled or disabled is platform-dependent, so verify the host FEC mode against your switch platform's transceiver table before commissioning. The module reports DOM telemetry and runs at 4.5 W from a 3.3 V supply over a 0 to 70 degrees C range.
EdgeOptic codes the module for multiple vendor platforms configured for the 100GBASE-BX40 / 100G-ER1-40 single-lambda BiDi class. Verify the part against your chassis transceiver compatibility table before deployment.
Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. Ships next business day from EU stock with a lifetime warranty. For coding requests or compatibility questions, contact our sales team.
Frequently Asked Questions
Does the 100G BiDi QSFP28 40km module fit the same port as a 100G QSFP28 LR4 or SR4?
The QSFP28 cage is the same, so the module seats in any standard 100G QSFP28 port. The cable plant is different. This BiDi module uses a single LC/UPC simplex connector over one SMF strand, while LR4 and SR4 use a duplex LC pair over two fibers. Plan for single-strand fiber and confirm the port is enabled for a single-lambda BiDi optic rather than a four-lane LR4/SR4 module.
Why does a 100G BiDi 40km link need two different module variants, Side A and Side B?
BiDi runs both directions over one fiber by using complementary wavelengths. Side A transmits at 1304.58 nm and receives at 1309.14 nm; Side B does the reverse. Each end has to receive on the wavelength the other transmits. Putting two Side A modules on opposite ends means both transmit at 1304.58 nm and neither listens for it, so the link never comes up. Every 40 km BiDi link needs one Side A and one Side B.
Is the BIDI-100G-Q28-SL42A the correct partner for the SL42B module?
Yes. BIDI-100G-Q28-SL42A (Side A, TX 1304.58 nm / RX 1309.14 nm) is the matched partner for BIDI-100G-Q28-SL42B (Side B, TX 1309.14 nm / RX 1304.58 nm). The two carry complementary wavelength coding for opposite ends of the same 40 km link. Order one of each per link.