DMLs

DML 25G TDM Laser

HL13BSCP01

DML

Lumentum’s DML 25G TDM laser combines high performance and energy efficiency for cost-sensitive single-mode optical links in access and aggregation networks. Operating at 1311 nm, this indium phosphide (InP) distributed-feedback (DFB) laser supports 25G operation over an extended temperature range of –40 °C to 85 °C and is also capable of 50G PAM4 modulation. Designed for direct current modulation with high-speed silicon-germanium (SiGe) driver chipsets, it delivers clean optical spectra with high linearity and low chirp. Built on Lumentum’s high-volume InP manufacturing platform and GR-468 qualified for long-term reliability, the DML 25G TDM enables simple, compact, and low-power transmitters for 25G SFP28 and 50G SFP56 modules—ideal for access, 5G fronthaul, and other high-density optical interconnect applications.

Features and Benefits

  • InP DFB laser with integrated Bragg grating for precise wavelength locking 
  • Supports 25G and 50G PAM4 direct modulation 
  • Center wavelength: 1311 nm 
  • Operating temperature range: –40 °C to 85 °C 
  • Typical reach up to 10 km over single-mode fiber 
  • High linearity and low chirp for clean, stable optical transmission 
  • GR-468 qualified for extended reliability 
  • Compact, low-power design for simple transmitter architectures 
  • Stable supply from Lumentum’s internal InP foundry 
  • Proven performance in 25G and 50G optical module families

Applications

  • 25G LR SFP28 modules for access and aggregation links 
  • 50G LR SFP56 modules for next-generation access deployments 
  • Short- to medium-reach single-mode fiber connectivity up to 10 km 
  • 5G fronthaul and backhaul network connections