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The NLK1U5FAAA from NTT Electronics Corporation is a DFB Laser Diode that operates at a wavelength of 1650 nm. It delivers a minimum fiber output power of 15 mW and has a spectral linewidth of 2 MHz. This laser diode has a side mode suppression ratio above 35 dB and maximum dark current of 100 nA. It has a forward voltage of 1.2 V, maximum Peltier voltage of 2 V, and current of 1 A. This laser diode has a thermistor resistance of 10 kOhms and isolation of 30 dB. It has a threshold current of 15 mA and minimum monitoring current of 0.1 mA. This laser diode has an internal thermoelectric cooler, a thermistor, and photodiode. It has a pigtail fiber and supports an FC/PC connector. This laser diode is available in a butterfly-type 14-pin package and is ideal for Near-IR gas analysis, tunable diode laser absorption spectroscopy (TDLAS), and fiber optic sensor applications.

Product Specifications

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Product Details

  • Part Number
  • Manufacturer
    NTT Electronics Corporation
  • Description
    1650 nm DFB Laser Diode for Fiber Optic Sensor Applications


  • Application
    Near-IR gas analysis, Tunable diode laser absorption spectroscopy (TDLAS), Fiber optic sensors

General Parameters

  • Technology
    Distributed Feedback (DFB)
  • Operation Mode
    CW Laser
  • Wavelength
    1625 to 1670 nm
  • Output Power
    15 mW
  • Output Power
    0.015 W
  • Spectral Width (FWHM)
    2 MHz
  • Forward Voltage
    1.2 to 1.6 V
  • Forward Current(PD)
    10 mA
  • Peak Forward Current
    225 mA
  • Reverse Voltage
    2 V
  • Reverse Voltage(PD)
    10 V
  • Threshold Current :
    15 to 20 mA
  • Monitor Current
    0.1 mA
  • Laser Color
  • Package Type
  • Package
    14 pin
  • Photo Diode Dark Current
    100 nA
  • Type
    Fiber-Coupled Laser Diode
  • Output Power (CW)
    0.015 W

Connections & Interface

  • Connector
    FC, PC


  • Operating Temperature
    -5 to 70 Degree C
  • Storage Temperature
    -40 to 85 Degree C

Technical Documents

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