LIGO Document T2100238-v3

Red Pitaya Digital Laser Controller

Document #:
LIGO-T2100238-v3
Document type:
T - Technical notes
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Abstract:
This report details using the Red Pitaya (125 MHz 14 bit) electronic board as a digital feedback controller for laser frequency stabilization. There is an exploration of various digital signal processing functionalities of a python interface to the onboard FPGA. Through a plant model approach, we attempt to validate the performance of Red Pitaya for feedback control. This is achieved by configuring the board to perform system identification and fitting frequency response data to a pole-residue model. The aim is to develop an automated device capable of determining the frequency response of some unknown plant and cancelling undesirable features (e.g. resonances) to produce a flat response.
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SURF21 SURF2021 SURF

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