Digital Laser Components

PLM-24-SPGD 24-Channel Laser SPGD Control Unit

Performing beam combining and compensating phase distortions through a stochastic parallel gradient descent (SPGD) algorithm

PLM-24-SPGD 24-Channel Laser SPGD Control Unit
  • PLM-24-SPGD 24-Channel Laser SPGD Control Unit
  • PLM-24-SPGD 24-Channel Laser SPGD Control Unit
  • PLM-24-SPGD 24-Channel Laser SPGD Control Unit
  • PLM-24-SPGD 24-Channel Laser SPGD Control Unit

    • Digital Laser Components

    PLM-24-SPGD 24-Channel Laser SPGD Control Unit

    Performing beam combining and compensating phase distortions through a stochastic parallel gradient descent (SPGD) algorithm

    PLM-24-SPGD 24-channel laser SPGD control unit is a laser array parameter controller based on a Stochastic Parallel Gradient Descent (SPGD) iterative optimization algorithm. It is primarily used to control the delay, phase, polarization, and optical axis of a laser array. This laser SPGD controller can be widely applied in fields such as laser coherent beam combining (CBC), power combining, and industrial optimization control, effectively mitigating the effects of mechanical vibration and thermal noise on laser beams.

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    Parameters
    Input Parameters
    Voltage range (V) 0 to +1.8 (50Ω load)
    Bit width (bit) 12
    Sampling frequency (MHz) 200
    Number of channels 2 (including 1 synchronous signal)
    Output Parameters
    Voltage range (V) -10 to +10 (50Ω load)
    Bit width (bit) 14
    Iteration frequency (MHz) 1
    Number of channels 24 (customizable)
    Power Requirements
    Supply voltage AC220V
    Power consumption 0.5A @ AC220V
    Dimensions & Weight
    Dimensions (L×W×H) (mm) 598 x 430 x 111
    Weight (kg) 5
    Environmental Adaptability
    Operating conditions -5 to +45°C, < 90%RH, can be reinforced for special environments
    Storage conditions -20 to +45°C, < 90%RH, can be reinforced for special environments
    Features
    • Multi-parameter control
      By using phase locking for the fiber laser array, the unit can precisely control the optical axis to combine multiple beams at a single target point. It can also drive a modulator to compensate for optical phase distortion.
    • Fast phase locking
      The advanced algorithm achieves a convergence speed of a few tens of microseconds, enabling rapid coherent beam combining for multiple lasers.
    • User customization
      A single controller can simultaneously output 24 control parameters. The system is scalable via clock synchronization, and the number of channels can be customized to meet user-specific needs.
    Applications
    • High-energy laser array incoherent (ICBC)/coherent (CBC)/spectral beam combining (SBC).
    • Non-coherent/coherent/spectral synthesis of high-energy laser arrays on a target.
    • Laser material processing.
    • Multi-input multi-output (MIMO) lidar/laser communication.
    • Optical system parameter stabilization.
    Composition & Principle

    The laser SPGD controller consists of an AC220V/DC24V power supply circuit, an SPGD control circuit, and SMA input/output interfaces. It receives an analog input signal as the objective function for the control algorithm. The algorithm runs simultaneously in the computing unit for each individual channel, calculating a digital output value based on the current input, which is then converted into an analog output signal to achieve high-speed multi-channel control.
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