4 Channel DFB Laser Source, Benchtop (DFB-4-B)

Data Sheet

Product Overview

The Optilab DFB-4-B is a Distributed Feedback (DFB) laser source in a benchtop unit designed for general laboratory applications and is a reliable and cost-effective DFB laser source for providing up to 4 DFB wavelengths.  With Optilab’s comprehensive inventory of high quality lasers, the DFB-4-B source can be ordered from a large variety of wavelengths, and is constructed with Telcordia-qualified lasers to ensure 15+ years of operating life. The DFB laser’s operating temperature and drive current are precisely monitored by a micro-controller to ensure constant output power and emission wavelength stability. Using its intuitive touch screen LCD display or an optional USB interface, the user can control the DFB output power level by adjusting the laser drive current and emission wavelength. Contact Optilab for more information.


  • Laboratory Testing and Measurement
  • DWDM Networks
  • Seed Laser
  • Fiber Optics Components Testing
  • Fiber Sensors


  • Up to 4 Wavelength DFB sources
  • DFB with up to 50 mW output
  • Stability Wavelength to ±5 pm
  • Over 80 DWDM Wavelengths Available
  • Polarization Maintaining (PM) output available
  • Touch Screen LCD and USB Interface
  • Wavelength tuning range: ±1.0 nm

Feature Name Description
Technical Specifications
Number of DFB Up to 4 Lasers in One Unit
Available Wavelength Range All C-Band DWDM Wavelengths; Custom L-Band upon Request. 1310 ±5nm, 1510 ±nm; 1600±5nm.
Wavelength Accuracy for Customization ±0.05 nm
Wavelength Tuning Range ±1.0 nm
Output Power 10 mW, 20 mW, 40 mW, 50 mW on select wavelengths
Output Power Stability ±0.1 dB over 8 hours
Wavelength Accuracy ±0.005 nm over 8 hours
Standard Laser Linewidth 2 MHz typ.
Narrow Linewidth < 1 MHz DFB available
Side Mode Suppression Ratio 45 dB typ.
Optical Isolator 30 dB min.
Relative Intensity Noise -145 dB/Hz max.
Polarization Extinction Ratio 20 dB typ. (with PM fiber Option)
Adjustable Features and Output
Channel Output Control On/Off
DFB Power Output Up to 6 dB Adjustment of Peak Power Output
DFB Wavelength Tuning ±1.0 nm from the center of the wavelength
Mechanical Specifications
Operating Temperature 10º C to +50º C
Storage Temperature -10º C to +70º C
Operating Humidity 0% to 85% Relative Humidity
Power Supply 80 – 240 V, 43 – 63 Hz AC or 40 - 58 V DC (Optional)
Power Consumption 50 W max.
Housing Dimensions Benchtop, 16" x 13.5" x 6.5"
Control / Monitoring LD Current, Output Power, Laser Wavelength
Remote Control RS-232 via USB Connector
Display LD Current, Laser Wavelength
Optical Connectors FC/APC, other options are available.
Optical Fiber Type SMF-28 (Standard), PANDA for PM Output