This repository contains the KiCad design files of a module for PDH error-signal generation. The PCB is used with a DDS board providing signals for modulation and phase-sensitive demodulation (Gra&Afch AD9959).
The module features:
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Modulation output for resonant EOM: 15 dBm / 100 MHz
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Variable gain photodetector amplifier: 0 dB to 20 dB / 100 MHz
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Internal demodulation with 4th order filter (10 MHz)
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Error signal output
- Voltage range: ±0.5 V @ 50 Ohm
- Output noise level: <20 nV/√Hz
The PCB and the DDS are placed in a standard 19''-rack mount unit. Display and controls of the DDS board are moved to the frontpanel as intended by the manufacturer. Use the rotary encoder breakout board for this task. See frontpanel/ folder for drawings and BOM.
Assembly units (see BOM for details)
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PDH-module PCB
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Fischer rack mount unit
The design files can be found on the releases page and include the following resources:
- Schematics as a PDF
- Gerber files
- Pick & place position files
- Bill of materials as a CSV file and also as an interactive HTML version
The latest revision of those files can be found here.
T. Preuschoff, Laser Technologies for Applications in Quantum Information Science, Ph.D. thesis, TU Darmstadt, 2023, https://tuprints.ulb.tu-darmstadt.de/23242/
- Dual power supply
- +15 V (0.5 A typ.)
- - 15 V (0.1 A typ.)
- 19-inch rack mount (e.g. Fischer Elektronik BGT384)
This work is released under the CERN OHL v.1.2 See www.ohwr.org/licenses/cern-ohl/v1.2 or the included LICENSE file for more information.