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The QL63D43A/B from Quantum Semiconductor International is a Continuous Wave Red Laser Diode that operates at a wavelength of 635 nm with a slope efficiency of 0.65 mW. This single transverse laser diode delivers an optical output power of 5 mW. It has a parallel beam divergence of 8 degrees and a perpendicular beam divergence of 34 degrees. This QL63D43A/B requires a threshold current of 21 mA, an operating current of 30 mA, and a reverse voltage of 30 V. It is available in a 3.3 mm TO-Can package and is ideal for optical leveler, laser module, and bar code reader applications.

Product Specifications View similar products

Product Details

  • Part Number
  • Manufacturer
    Quantum Semiconductor International
  • Description
    635 nm CW Single Mode Laser Diode for Optical Leveler & Bar Code Reader Applications


  • Application
    Bar Code Reader, Laser module, Optical Leveler

General Parameters

  • Configuration
    Single Emitter
  • Operation Mode
    CW Laser
  • Wavelength
    635 nm
  • Output Power
    5 mW
  • Operating Voltage
    2.3 V
  • Operating Current
    30 mA
  • Reverse Voltage(PD)
    30 V
  • Threshold Current
    21 mA
  • Beam Divergence Parallel
  • Beam Divergence Perpendicular
  • Package Type
  • Package
    3.3 mm TO Can Package
  • Type
    Free Space Laser Diode


  • Operating Temperature
    -10 to +40 °C
  • Storage Temperature
    -40 to +85 °C

Technical Documents

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