Quanta ControlQuantaControl

FPGA-Based Feedback Control for Quantum Optics

Control at the
Speed of Light

FPGA-native feedback control for optical quantum research. Kerr-comb and EO-comb stabilization, cavity locking, and quantum-limited measurement — with sub-microsecond loop latency and no proprietary software.

125MHz

FPGA Clock Rate

<1µs

Loop Latency

14bit

ADC Resolution

1MSPS

Controller Rate

See it in Action

Watch a demonstration of our FPGA-based feedback controller in real-time.

Engineered for Precision

Every component of the signal chain is designed for maximum performance and minimum latency.

FPGA-Native Processing

All signal processing runs directly on the Xilinx Zynq FPGA at 125 MHz clock rate. No CPU bottleneck, no OS jitter — deterministic real-time control.

Lock-in Amplification

Quadrature demodulation via DDS and 6-stage CIC decimation. Extract PDH error signals and phase-sensitive measurements buried deep in noise.

Real-time PID Control

Fixed-point PI/PID controller with configurable gains and anti-windup. Designed for cavity locking, comb stabilization, and multi-loop optical systems.

Web-Based Control

Real-time oscilloscope display, parameter tuning, and Allan deviation analysis — all from your browser. No proprietary software needed.

Signal Chain Architecture

Open-source reference implementation from our RedPitaya-FPGA repository. RTL in modeling/, web interface in rp_web/.

Signal Gen3-tone DDS+DAC14-bit OUTSMA CableADC14-bit INCIC Filter6-stageScaler64b → 14bPIDKp + KiOutput MUXCH1 / CH2Web UIScope + Control-Closed-Loop Feedback Controller — FPGA Signal Chain125 MHz125 MSPSR=125 → 1 MSPSFPGA (Zynq-7010/7020)

Have a locking problem?

Whether you are stabilizing a Kerr-comb, locking a cavity, or designing a custom control loop for a demanding optical system, we can help.

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