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  • HHL-8500-CW-1N 光发射机.jpg

HHL-8500-CW-1N optical transmitter

Classification:

Pulse light source

The HHL-8500-CW-1N Transmitter adopts 8.5um QCL laser, continuous or pulse operation mode. Pulse width range: 1ns-200ns, repetition frequency up to 300MHz. A 155Mbps-622Mbps(OC-3,OC-12) bitstream may be transmitted. Differential input with 200mV minimum input voltage swing. Dual power supply (5V, 12V). Laser temperature control range: 15 C- 28 C (customized according to user requirements). Output average optical power up to 250mW. Integrated thermal protection, overvoltage protection, overcurrent protection, power reverse connection protection function. The threshold current, optical power, extinction ratio and swing amplitude of the QCL laser can be adjusted. Small size, low power consumption, high speed, easy to connect and use. It is currently the world's fastest mid-infrared emission component.

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Cheryl Chen
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  • Product Information(PDF)

    The HHL-8500-CW-1N Transmitter adopts 8.5um QCL laser, continuous or pulse operation mode. Pulse width range: 1ns-200ns, repetition frequency up to 300MHz. A 155Mbps-622Mbps(OC-3,OC-12) bitstream may be transmitted. Differential input with 200mV minimum input voltage swing. Dual power supply (5V, 12V). Laser temperature control range: 15 C- 28 C (customized according to user requirements). Output average optical power up to 250mW. Integrated thermal protection, overvoltage protection, overcurrent protection, power reverse connection protection function. The threshold current, optical power, extinction ratio and swing amplitude of the QCL laser can be adjusted. Small size, low power consumption, high speed, easy to connect and use. It is currently the world's fastest mid-infrared emission component.

     

     

    Application field Applications

    mid-infrared space communication

    mid-infrared spectral analysis

    Mid-infrared gas detection

    mid-infrared imaging

    mid-infrared radar

    mid-infrared medical

     

     

    Performance parameters:

     

    CW operating mode:

    A. measure the voltage Vb across the constant current source sampling resistor R7, Ibias = Vb÷ R7, adjust VR2 to the target output average optical power according to the corresponding relationship in fig. 2 and fig. 3, and check whether it meets the target value with an optical power meter, with the maximum Ibias = 0.75A.

    B. according to the requirements of fig. 1, input the signal, connect the photodetector to the oscilloscope, and observe the quality of the light waveform. Adjust VR1 to change the power amplifier gain to the best waveform quality; adjust VR4 to change the power amplifier bias voltage, the higher the bias voltage, the greater the modulation current, the greater the waveform amplitude, the greater the extinction ratio. Maximum modulation current up to 1A. VR1 and VR4 are adjusted in combination to achieve optimum waveform quality and amplitude.

    C. When the input signal is a bit stream, please pay attention to the encoding method. It is recommended that the number of consecutive codes is less than 7,8b/10b Encoding to ensure the minimum jitter performance. Transmission rate range: 155Mbps-622Mbps.

    Pulse working mode:

    A. measure the voltage Vb across the constant current source sampling resistor R7, Ibias = Vb÷ R7, adjust VR2 to the vicinity of QCL threshold according to the corresponding relationship in fig. 2 and fig. 3, and use an optical power meter to check whether the output optical power meets the definition of no light, with the maximum Ibias = 0.75A.

    B. according to the requirements of fig. 1, input the signal, connect the photodetector to the oscilloscope, and observe the quality of the light waveform. Adjust VR1 to change the power amplifier gain to the best waveform quality; use an optical power meter to measure the output average optical power under different pulse widths and repetition frequencies, and adjust VR4 to change the power amplifier bias voltage. The higher the bias voltage, the greater the modulation current, the greater the waveform amplitude, the greater the extinction ratio, and the greater the output average optical power. Maximum modulation current up to 1A. VR1 and VR4 combine adjustments to achieve the best waveform quality, edge velocity, pulse amplitude, and output average optical power.

     

     

     

     

HY-HHL-8500-CW-1N 光发射机(中文版）(1).pdf

Key words:

HHL-8500-CW-1N optical transmitter

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