PLM-24-SPGD 24-Channel Laser SPGD Control Unit
Digital Laser Components
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.
| 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 |
- 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.
- 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.
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.
