1550 nm DFB Laser Diode, PM Output, up to 30 mW (DFB-1550-PM)

Data Sheet

Product Overview

The Optilab DFB-1550-PM is a Distributed FeedBack Laser designed for Continuous Wave (C.W) operation. It is mostly utilized in combination with an external optical modulator, such as a Mach-Zehnder Interferometer (MZI) modulator. The MQW DFB laser features up to 30 mW of output optical power, high side mode suppression ratio, low RIN noise, and a narrow linewidth. The DFB-1550-PM is housed in an industry standard 14-pin butterfly package, with a built-in thermoelectric cooler, thermistor, a back-facet monitor photodiode for conventional power monitoring, and an optional second photodiode for wavelength reference monitoring. Availabile in a wide variety of C-band wavelengths, the DFB-1550-PM can be temperature tuned to ITU frequencies to allow for Dense Wavelength Division Multiplexing (DWDM) applications.


  • Dense Wavelength Division Multiplex (DWDM)
  • RF over Fiber (RFoF)
  • Hybrid Fiber-Coaxial (HFC)
  • General laboratory and research use


  • Polarization maintaining output
  • Up to 30 mW output power
  • Low RIN noise, -145 dB/Hz maximum
  • Narrow linewidth, 2 MHz typ.
  • 18 Wavelenghts to select:
  • from 1528 nm - 1562 nm
  • Built-in TEC, Thermistor & Monitor PD

Feature Name Description
General Specifications
Wavelength Range 1528 nm- 1562 nm
Wavelength Accuracy ± 1 nm
Optical Output Power 20, 30 mW
Operating Current 220 mA max. @ CW
Forward Voltage 2.5 V typ.
Wavelenth Tuning ± 1.5 nm
Threshold Power 150 μW
Monitor Current 0.10 mA min., 1.0 mA max.
Photodiode Dark Current 2 nA typ., 100 nA max.
Side Mode Suppression 30 dB min.
Linewidth 2 MHz typ.
Optical Isolation 35 dB min.
Relative Intensity Noise -145 dB/Hz max.
Polarization Extinction Ratio 20 dB typ.
TEC and Thermistor Characteristics
TEC Current 1.0 A max.
TEC Voltage 2.4 V max.
TEC Resistance 2.4 Ω typ.
Thermistor Resistance 7.7 k Ω min., 12.6 k Ω max.
Thermistor B Constant 3,270 K min., 3,630 K max.
Absolute Maximum Ratings
Reverse Voltage 2 V
Operating Current 300 mA
PD Reverse Voltage 20 V
PD Forward Current 10 mA
TEC Voltage 4 V
TEC Current 4 A
Mechanical Specifications
Operating Temperature -10 ºC to +60 ºC
Storage Temperature -40 ºC to +70 ºC
Operating Humidity 95% @ <30ºC
Optical Fiber Type Panda PM
Optical Connector FC/APC, others available