L-EML Transmitter-Boards

L-EML Transmitter boards 3644 and 3645
from Emcore

Emcore’s Model 3644 transmitter card is a linear externally-modulated 1550 nm transmitter subassembly that is optimized for the 190CW channel plan with an operation bandwidth to 1.2 GHz. The source laser utilizes Emcore’s industry leading 1550 nm, high-power, low-noise, narrow linewidth Linear Externally Modulated Laser (L-EMLTM ). The transmitter card is designed to support traditional Hybrid Fiber Coax (HFC) applications, RFoG and RF overlay for Fiber-To-The-Premise (FTTP) supporting links from 0 to 100 km.
The 75 ohm RF video input supports frequencies up to 1218 MHz. Integrated within the design is Emcore’s patented predistortion technology to provide outstanding noise and distortion performance. There is an RF test port on board with monitor and control via an RS-232 interface. The board is offered in a compact form factor.


  • Telecommunication
  • Network operators


Video Signal Distribution to HFC CATV, RFoG and RF overlay for FTTH


  • Advanced Linear EML Laser
  • Long Distance Link up to 100 km
  • Optimized RF Integration of Predistorter,Amplifiers, and Laser
  • Complete, Efficient Laser Bias and TEC Control Circuitry
  • “Plug and Play” Assembly Reduces Manufacturing Costs
  • Compact Shape Fits Into a Variety of Transmitter Platforms
  • Digital Monitoring and Control


  • Easy commissioning and integration
  • Excellent price-performance ratio
  • Shorter “Time-To-Market” due to the modular design;

Important specifications

Item number
Technology Transmission range
max Input
Frequency range CATV
Popt. Out
CATV Carrier
to Noise Ratio
BER Wavelength
3644-001-xx L-EML-Tx-Board 60,0 -12 47-1218 11,5 12 – 16 47,5 -55 -60 44 1E-9 1528 – 1563, ITU
3645-001-xx L-EML-Tx-Board 20,0 -12 47-1218 11,5 20 47,5 -55 -60 40 1E-9 1528 – 1563, ITU

Your contact

Harald Sittenauer

Harald Sittenauer

+49 (0)811 998707-22 Write email