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laser_backplane_dvi

Laser backplane with DVI connector featuring fast current modulation and a laser diode protection.

https://github.com/tu-darmstadt-apq/laser_backplane_dvi

Science Score: 75.0%

This score indicates how likely this project is to be science-related based on various indicators:

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    CITATION.cff file
    Found CITATION.cff file
  • ✓
    codemeta.json file
    Found codemeta.json file
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    .zenodo.json file
    Found .zenodo.json file
  • ✓
    DOI references
    Found 2 DOI reference(s) in README
  • ✓
    Academic publication links
    Links to: arxiv.org
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    Academic email domains
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    Organization tu-darmstadt-apq has institutional domain (www.iap.tu-darmstadt.de)
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    Low similarity (8.0%) to scientific vocabulary

Keywords

kicad-8 lasers
Last synced: 9 months ago · JSON representation ·

Repository

Laser backplane with DVI connector featuring fast current modulation and a laser diode protection.

Basic Info
  • Host: GitHub
  • Owner: TU-Darmstadt-APQ
  • License: other
  • Language: Prolog
  • Default Branch: master
  • Homepage:
  • Size: 25.5 MB
Statistics
  • Stars: 4
  • Watchers: 2
  • Forks: 1
  • Open Issues: 0
  • Releases: 12
Topics
kicad-8 lasers
Created over 5 years ago · Last pushed 10 months ago
Metadata Files
Readme License Citation

README.md

Build manufacturing files

Laser Head with fast Modulation Input

This repository contains the KiCad design files for a compact laser backplane with a DVI connector for application in an ECDL laser system. The laser backplane features a fast current modulation input designed for large-bandwidth laser-frequency stabilization and a laser diode protection circuit. An additional connector for the laser piezo actuator is available.

RedPitaya_Lockbox

RedPitaya_Lockbox

Laser diode protection circuit

The protection circuit consists of a relay and a reverse protection diode. The latching relay shorts the laser diode whenever the cable is disconnected or the current driver is turned off. In order to reduce the relay idle current, a latching relay and circuit are used. A fast switching transistor is used as reverse protection diode. The transistor features a very low reverse current leakage and a fast reverse recovery time.

Fast Current Modulation

The fast modulation input consists of a Howland Current Pump complemented by a passive impedance matching network (see related work for details). It features: - 3 dB gain flatness DC to 100 MHz - Phase lag below 90° up to 25 MHz - Transconductance gain of 1 mA / V - Input voltage range ±4.8 V

Note on the compliance voltage The compliance voltage of the Howland Current Pump is half of the positive output voltage swing of the operational amplifier. The circuit is implemented by a rail-to-rail output operational amplifier (ADA4807) supplied by ±5 V. Hence, the voltage at the laser diode anode is limited to 2.4 V accounting for a small head-room. Some additional head-room should be reserved for the (small) rise of the voltage required for the maximal output of the current source (5 mA). The maximal laser diode anode voltage is sufficient as a compliance voltage for infra red laser diodes.

Pin Configuration

Connector: DVI-I Dual Link (female)

Source: https://en.wikipedia.org/wiki/Digital_Visual_Interface#/media/File:DVI_Connector_Pinout.svg

| Pin | Signal | Description | | --- | --- | --- | | 1 to 5 | NC | | | 6 | -12 V | Negative supply for fast current modulation: -20 V to -5.5 V / 10 mA (max.) | | 7 | EEPROM | Optional single wire EEPROM: AT21CS11 | | 8 | NC | | | 9 | Ld- | Laser diode cathode current pin 1/2 | | 10 | LD+ | Laser diode anode current pin 1/2 | | 11 | NC | | | 12 | Ld- | Laser diode cathode current pin 2/2 | | 13 | LD+ | Laser diode anode current pin 2/2 | | 14 | +12 V | Positive supply for fast current modulation and protection circuit: 7 V to 18 V / 50 mA (max.) | | 15 | GND | Ground reference for power supply and modulation circuit | | 16 | Relay- | Connect to GND to switch the relay to 'laser on' state | | 17 to 22 | NC | | | 23 | Vdiode+ | Laser anode voltage sense connection | | 24 | Vdiode- | Laser cathode voltage sense connection | | C1 to C5 | NC | | | SH | NC | Connect the shield to the laser case only |

Design Files

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.

Related Work

Review of Scientific Instruments 93, 063002 (2022); https://doi.org/10.1063/5.0093520

arXiv:2203.06097 [physics.optics]; https://arxiv.org/abs/2203.06097

T. Preuschoff, Laser Technologies for Applications in Quantum Information Science, Ph.D. thesis, TU Darmstadt, 2023, https://tuprints.ulb.tu-darmstadt.de/23242/

License

This work is released under the CERN-OHL-W See https://ohwr.org/cernohlw_v2.pdf or the included LICENSE file for more information.

Owner

  • Name: TU Darmstadt, Atoms - Photons - Quanta
  • Login: TU-Darmstadt-APQ
  • Kind: organization
  • Email: patrick.baus@physik.tu-darmstadt.de
  • Location: Darmstadt, Germany

Researching on Quantum Optics, Atomic Physics, Quantum Information, and Quantum Dynamics.

Citation (CITATION.cff) 

cff-version: 1.2.0
title: Laser Head with fast Modulation Input
message: >-
  If you use this software, please cite both the article
  from preferred-citation and the design itself.
type: software
authors:
  - given-names: Tilman
    family-names: Preuschoff
    affiliation: 'TU Darmstadt, Institut für Angewandte Physik'
    orcid: 'https://orcid.org/0000-0001-6158-6939'
  - given-names: Patrick
    family-names: Baus
    email: patrick.baus@physik.tu-darmstadt.de
    affiliation: 'TU Darmstadt, Institut für Angewandte Physik'
    orcid: 'https://orcid.org/0000-0002-0318-5245'
repository-code: 'https://github.com/TU-Darmstadt-APQ/Laser_Backplane_DVI'
license: CERN-OHL-1.2
version: 1.7.3
date-released: '2023-11-20'
preferred-citation:
  title: Wideband current modulation of diode lasers for
      frequency stabilization
  type: article
  authors:
    - given-names: Tilman
      family-names: Preuschoff
      affiliation: 'TU Darmstadt, Institut für Angewandte Physik'
      orcid: 'https://orcid.org/0000-0001-6158-6939'
    - given-names: Patrick
      family-names: Baus
      email: patrick.baus@physik.tu-darmstadt.de
      affiliation: 'TU Darmstadt, Institut für Angewandte Physik'
      orcid: 'https://orcid.org/0000-0002-0318-5245'
    - given-names: Malte
      family-names: Schlosser
      affiliation: 'TU Darmstadt, Institut für Angewandte Physik'
      orcid: 'https://orcid.org/0000-0001-9004-5664'
    - given-names: Gerhard
      family-names: Birkl
      affiliation: 'TU Darmstadt, Institut für Angewandte Physik'
      orcid: 'https://orcid.org/0000-0002-4137-9227'
  url: 'https://github.com/TU-Darmstadt-APQ/Laser_Backplane_DVI'
  doi: 10.1063/5.0093520
  journal: "Review of Scientific Instruments"
  volume: 93
  number: 6
  pages: 063002
  year: 2022
  month: 6
  abstract: "We present a current modulation technique for diode laser systems, which is specifically designed for high-bandwidth laser frequency stabilization and wideband frequency modulation with a flat transfer function. It consists of a dedicated current source and an impedance matching circuit both placed close to the laser diode. The transfer behavior of the system is analyzed under realistic conditions employing an external cavity diode laser (ECDL) system. We achieve a phase lag smaller than 90° up to 25 MHz and a gain flatness of ±3 dB in the frequency range of DC to 100 MHz, while the passive stability of the laser system is not impaired. The potential of the current modulation scheme is demonstrated in an optical phase-locked loop between two ECDL systems with a phase noise of 42 mradrms. The design files are available as an open-source project."
  issn: "0034-6748"

GitHub Events

Total
  • Release event: 6
  • Watch event: 1
  • Delete event: 19
  • Push event: 31
  • Pull request event: 27
  • Create event: 21
Last Year
  • Release event: 6
  • Watch event: 1
  • Delete event: 19
  • Push event: 31
  • Pull request event: 27
  • Create event: 21

Issues and Pull Requests

Last synced: 10 months ago

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  • Total pull requests: 17
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  • Average comments per issue: 0
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  • Merged pull requests: 12
  • Bot issues: 0
  • Bot pull requests: 1
Past Year
  • Issues: 0
  • Pull requests: 17
  • Average time to close issues: N/A
  • Average time to close pull requests: about 4 hours
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  • Average comments per pull request: 0.0
  • Merged pull requests: 12
  • Bot issues: 0
  • Bot pull requests: 1
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