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    • 1550nm 1.0mW SM VCSEL without Isolator

    Vertical-Cavity Surface-Emitting Laser, or VCSEL for short, is a semiconductor laser that emits light vertically from the top surface.Based on GaAs semiconductor material, it differs from both LEDs (Light-Emitting Diodes) and LDs (Laser Diodes).The structure consists of mirrors, an active layer, and a metal contact layer.The two emission mirrors are P-type and N-type Bragg reflectors respectively.The active region is composed of quantum wells.A metal contact layer is formed on the outer surface of the P-type DBR to provide ohmic contact,and a circular aperture is patterned on the P-type DBR for laser output.It features a small far-field divergence angle with a narrow and circular beam;low threshold current and high modulation frequency up to 300 kHz.Wavelength tuning can be achieved by varying the drive current and temperature.Packaged with built-in TEC and PD, it is specifically designed for high-speed optical fiber communications.

    Product features：High stability; narrow linewidth; low noise; stable wavelength; industrial-grade reliability

    Part Number：MP-VCS-1550-1-A81-SA-TEC

    Application area：Fiber Optic Sensing | Coherent Communications | LiDAR | Quantum Technology | Scientific Research

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    Main parameters
  • Core parameters

  • Central Wavelength

    1550 nm

  • Dimension Drawing
    • General Parameters

    Technical Specifications

    Tc = 20 °C, IOP = 2.0 mA unless otherwise noted(Tc = chip backside temperature, controlled by TEC)

    Parameter

    Symbol

    Min.

    Typ.

    Max.

    Unit

    Optical Output Peak Power @ 25 °C

    P

    1.0

    1.6

    –

    mW

    Operating Bias Current

    Iop

    0

    18

    25

    mA

    Operating Temperature Range

    Top

    -40

    25

    85

    °C

    Threshold Current

    Ith

    –

    8

    12

    mA

    Slope Efficiency (CW, Tc = 25 °C)

    SE

    0.14

    0.18

    –

    mW/mA

    Laser Drive Voltage

    VCC

    0

    1.5

    2.5

    V

    Series Resistance

    Rs

    –

    50

    –

    Ω

    Center Wavelength

    –

    1525

    –

    1575

    nm

    Guaranteed Tuning Range(Positive voltage reduces peak wavelength)

    λ

    8

    10

    –

    nm

    Max. Frequency Tuning Response

    fmax

    100

    200

    –

    kHz

    Side Mode Suppression Ratio

    SMSR

    30

    40

    –

    dB

    Linewidth (-3 dB FWHM, CW bias = IOP)

    σ

    –

    –

    300

    MHz

    Relative Intensity Noise

    RIN

    –

    –

    -128

    dB/Hz

    Tuning Voltage

    Vtune

    0

    Test Sheet

    Test Sheet

    V

    Tuning Current

    Itune

    0

    –

    100

    μA

    TEC Voltage

    VTEC

    –

    0.35

    1.5

    V

    TEC Current

    ITEC

    –

    0.05

    0.6

    A

     

    Experimental Data

    We conducted experiments on the VCSEL laser, measuring the relationships of voltage, current with wavelength, as well as the relationship with frequency.

    1779245057831406.jpg 

    VCSEL Spectrum


    1779244632124588.png 

    VCSEL Test Socket

     

    Relationship between current and wavelength:

    We kept the voltage constant and adjusted the current from 13 mA to 25 mA in steps of 3 mA. It was found that as the current was adjusted, the wavelength changed significantly and exhibited a positive linear curve.

    1779244639568790.png 


    Relationship between voltage and wavelength:

    We applied voltages from 4V to 18V to the laser, increasing in 2V steps, and measured the data shown in the figure above. We observed that as the voltage increased, the wavelength decreased by approximately 8 nm, exhibiting a negative, nearly linear curve.

    1779244645860999.png

     

    Load Variation at Different Frequencies：

    1.5.png 

    Waveform@5V 20kHz


    1.6.png 

    Waveform@5V 40kHz

     

    1.7.png 

    Waveform@5V 60kHz


    1.8.png 

    Waveform@5V 80kHz


    1.9.png 

    Waveform@5V 100kHz


    1.10.png 

    Waveform@5V 120kHz

     

    1.11.png 

    Waveform@5V 140kHz

    With a constant 5V voltage applied, the frequency was varied to obtain the figure above. Our modulation frequency is extremely high, allowing it to carry a greater amount of information and provide a faster response speed.

     

    Pin Definition

    1.12.png 

    The generation of VCSEL laser mainly consists of three components: the laser gain medium, the pump source, and the optical resonant cavity.The pump source excites the gain medium to achieve population inversion and generate light emission.Within the resonant cavity formed by the bottom and top mirrors, the light is amplified and oscillates, finally outputting from the top mirror.The output light is confined only to the central region without an oxide layer, forming vertical-cavity surface-emitting laser and producing a stable, continuous, high-quality laser beam with sufficient output power.

     

    Optional Configurations

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    Downloads

    1550nm 1.0mW SM VCSEL without Isolator.pdf

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  • Product title: 1550nm 1.0mW SM VCSEL without Isolator
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