1 / 19

Electronic Design of an Acousto Optic Tunable All Fiber Spectrometer

This project focuses on designing an Acousto-Optic Tunable Filter (AOTF) using an all-fiber spectrometer setup. The AOTF, based on PZT technology, enables precise frequency control for various applications like infrared imaging and spectral analysis. The system integrates components such as light sources, photodetectors, and microcontrollers. Results include successful VCO control with some heat issues that need further investigation.

dderry
Download Presentation

Electronic Design of an Acousto Optic Tunable All Fiber Spectrometer

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Electronic Design of an Acousto Optic Tunable All Fiber Spectrometer Tanuja A. Mouli Faculty Mentor: Professor Henry P. Lee Graduate Student: Fares Alhassen

  2. The Project: Big Picture Unknown Wavelength

  3. Acousto Optic Tunable Filter (AOTF) Metal Frame Optical Fiber PZT

  4. AOTF: The PZT (Piezo Electric Tansducer) • Aluminum cone is attached to PZT disk • When AC voltage is applied, the cone vibrates up and down CONE AC PZT

  5. The AOTF Acoustic wave RF PZT and horn (Piezo Electric Transducer) • When PZT vibrates, it creates a micro acoustic wave • Tunable filter is created by changing the frequency of PZT

  6. AOTF: Notch Filter • Acts to pass wide range of frequencies • While attenuating narrow band of frequencies

  7. AOTF PZT Aluminum Cone

  8. Why use AOTF? • AOTF is easily tuned and can be controlled electronically • Optic fibers have low insertion power loss • Original spectrometer used costs 30K • Spectrometer built with AOTF will be low cost ($100), compact and portable

  9. Common Applications • detect chemical compounds • particle sizes • Vibration • acoustic waves • electric field • fluid flow and temperature

  10. Spectrometric Applications • Broadband Infrared (BBIR) • Tunable Camera Filter (TCF) • Portable Optical Spectra Analyzer (POSA)

  11. The Design of the Spectrometer Light Source AOTF Photodetector (PD) RF Amplifier Current –to- Voltage Conversion VCO Microcontroller Output Data

  12. Schematic: Microcontroller Connection with VCO 1. Press button once 2. Press button again 1V 2V 3V 4V

  13. Schematic: Current to Voltage Converter

  14. Schematic: Overall Circuit

  15. Final Circuit VCO C-V converter MCU

  16. Problems and Solutions • VCO purchased (part #SN54LS624) did not output a clean sinusoidal. • A different VCO was used (MAX038) • When MAX038 was connected to microcontroller, the VCO gets hot

  17. Results/Conclusion • Successfully controlled VCO • Need to work on why VCO gets hot. • Controlled C-V converter • Could not view output data

  18. Said M. Shokair Dr. Henry P. Lee Fares Alhassen Patrick Chan Kevin Edmonds UROP UCI IM-SURE Acknowledgements

  19. ANY QUESIONS?

More Related