# DFT Telecom – High-Performance Optical Transceivers 100G QSFP28 LR 10km LC Transceiver

### **![](https://cdn.shopify.com/s/files/1/0758/0362/3703/files/69e9b087b5c18c908db792aa483f4a60.jpg?v=1760857551)**

### **Features**

· Compliant with IEEE 802.3ba 100GBASE-LR4 standard

· Electrical interface compliant with QSFP28 MSA and CAUI-4

· Hot-pluggable QSFP28 form factor

· 4-channel WDM design with LAN-WDM wavelengths (1295.56–1309.14 nm)

· Supports up to 10 kilometers over single-mode fiber (SMF)

· Duplex LC connector interface

· Low power consumption (<3.5W)

· Operating case temperature: 0°C to +70°C (commercial), optional -40°C to +85°C (industrial)

· Digital diagnostics monitoring via I²C interface (SFF-8636 Rev 2.10a)

· Fully RoHS compliant and lead-free

### **Applications**

· 100 Gigabit Ethernet in data centers and enterprise networks

· High-speed interconnects between switches, routers, and servers

· Metro access and aggregation networks

· Cloud infrastructure and high-performance computing (HPC)

· Upgrade of existing 10G/40G network backbones

### **Product Description**

The FT-QSFP28-LR-10KM is a high-performance, four-lane 100Gbps QSFP28 transceiver designed for long-reach optical communication over standard single-mode fiber. It supports link distances of up to 10 kilometers, making it ideal for cost-effective, high-density 100G deployments.

This module uses four independent optical lanes at LAN-WDM wavelengths, each transmitting and receiving at 25.78 Gbps, aggregated into a total line rate of 103.125 Gbps (CAUI-4). The transmitter employs four uncooled DFB lasers, while the receiver uses a PIN photodiode array with TIAs. All signals are routed through a duplex LC connector using wavelength division multiplexing (WDM) technology.

With full digital diagnostics capabilities and robust thermal design, this transceiver ensures reliable operation in demanding environments.

### **Optical Characteristics (Over Recommended Operating Conditions)**

**Parameter**

**Symbol**

**Min**

**Typ**

**Max**

**Unit**

**Notes**

Data Rate per Lane

\-

\-

25.78

\-

Gbps

PRBS 231\-1

Wavelength Range

λ

1295.56

\-

1309.14

nm

4-channel LAN-WDM

Channel Spacing

Δλ

4.5

\-

5.0

nm

\-

Average Launch Power per Lane

PT

\-6.0

\-3.0

+0.5

dBm

Per lane, into SMF

Tx Power Balance Across Lanes

ΔPT

\-

\-

3.5

dB

Max difference

Receiver Sensitivity

PR

\-

\-

\-10.5

dBm

Per lane, BER ≤ 5×10−5

Overload (Receiver)

Psat

\-

\-

\-1.0

dBm

Per lane

Extinction Ratio

ER

3.5

\-

\-

dB

\-

Optical Return Loss

ORL

26

\-

\-

dB

Tx port

### **Electrical & Mechanical Specifications**

· Supply Voltage: 3.3V ±5%

· Power Consumption: <3.5W

· Input/Output Interface: 4x 25.78 Gbps electrical lanes (CAUI-4)

· Differential Impedance: 100 Ω

· Connector Type: Duplex LC

· Housing: Metal enclosure with EMI shielding

· Dimensions: 18.35 mm × 13.5 mm × 107.8 mm (W×H×L)

· Weight: ~38g

· Cooling: Passive air cooling required; minimum airflow recommended

### **Digital Diagnostics (DDM/DOM)**

Supports real-time monitoring via I²C interface per **SFF-8636 Rev 2.10a**, including:

· Module temperature

· Supply voltage

· Laser bias currents (Tx1–Tx4)

· Transmitted optical power (per lane)

· Received optical power (total or per lane if supported by host)

· Alarm and warning flags (high/low thresholds)  
Configurable thresholds and calibration data stored internally.

### **Compliance & Standards**

· **Standards**: IEEE 802.3ba 100GBASE-LR4

· **Form Factor**: QSFP28 MSA

· **Management Interface**: SFF-8636 Rev 2.10a

· **Laser Safety**: IEC 60825-1:2014 / FDA CDRH Class 1

· **Electrical Safety**: IEC/EN/UL 62368-1

· **Environmental**: RoHS 6/6 compliant

· **EMI**: FCC Part 15 Subpart B, CISPR 32 Class A

· 

 **Caution**: Do not view fiber ports directly. Invisible laser radiation may be present when powered. Avoid eye exposure.

## Details

- **Price:** 0.0 USD
- **Vendor:** DFT TELECOM
- **Type:** 电脑网络
- **Tags:** 5G, Datacenter, dfttelecom, optic module, ROUTER, switch

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 0.00 USD | In stock |

## Images

- DFT Telecom – High-Performance Optical Transceivers 100G QSFP28 LR 10km LC Transceiver
- DFT Telecom – High-Performance Optical Transceivers 100G QSFP28 LR 10km LC Transceiver

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> Source: [DFT TELECOM ](https://dfttelecom.com/products/dft-telecom-high-performance-optical-transceivers-100g-qsfp28-lr-10km-lc-transceiver)
> Updated: 2026-08-28