Nanosecond pulsed current source for light emitting diode (LED) driven photoacoustic signal acquisition systems
Photoacoustic imaging (PAI) is gaining attention for its non-invasive diagnostic capabilities. Traditionally, bulky and expensive laser systems have been used as excitation light sources in PAI, posing challenges for translation and remote applications. High-power light emitting diodes (LEDs) can be...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | JPhys Photonics |
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| Online Access: | https://doi.org/10.1088/2515-7647/adab59 |
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| author | Avishek Das Manojit Pramanik |
| author_facet | Avishek Das Manojit Pramanik |
| author_sort | Avishek Das |
| collection | DOAJ |
| description | Photoacoustic imaging (PAI) is gaining attention for its non-invasive diagnostic capabilities. Traditionally, bulky and expensive laser systems have been used as excitation light sources in PAI, posing challenges for translation and remote applications. High-power light emitting diodes (LEDs) can be an alternative light source. However, the necessary driver circuitry has not been extensively studied for driving the nanoseconds pulsed LEDs. This study develops and demonstrate for the first time the full circuit, performance, optimization and operating procedures of a nanosecond pulsed current source (NSPCS) to drive a high-power, high-speed LED array for PAI. The NSPCS driver can deliver tunable pulsed LED currents between 0 and 20 A, pulse widths of 50–100 ns, and trigger pulse repetition rates up to 20 kHz, achieving a driver efficiency of 58.27%. It can drive an array of 37 high-power LEDs (850 nm wavelength) with an electrical-to-optical efficiency of 24.8%. Illumination with this LED array produced a photoacoustic signal (after 79 dB amplification with low-noise amplifier) of 3.92 V (peak-to-peak) and a signal-to-noise ratio of 79.36 dB. The NSPCS circuit has demonstrated effective generation of tunable high-current pulses for LED-based PAI applications. |
| format | Article |
| id | doaj-art-ec2d23837e1c422ab97ce5715cd6c371 |
| institution | Kabale University |
| issn | 2515-7647 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | JPhys Photonics |
| spelling | doaj-art-ec2d23837e1c422ab97ce5715cd6c3712025-01-27T12:13:49ZengIOP PublishingJPhys Photonics2515-76472025-01-017101501510.1088/2515-7647/adab59Nanosecond pulsed current source for light emitting diode (LED) driven photoacoustic signal acquisition systemsAvishek Das0https://orcid.org/0000-0002-9250-8287Manojit Pramanik1https://orcid.org/0000-0003-2865-5714Department of Electrical and Computer Engineering, Iowa State University , Ames, IA, United States of AmericaDepartment of Electrical and Computer Engineering, Iowa State University , Ames, IA, United States of AmericaPhotoacoustic imaging (PAI) is gaining attention for its non-invasive diagnostic capabilities. Traditionally, bulky and expensive laser systems have been used as excitation light sources in PAI, posing challenges for translation and remote applications. High-power light emitting diodes (LEDs) can be an alternative light source. However, the necessary driver circuitry has not been extensively studied for driving the nanoseconds pulsed LEDs. This study develops and demonstrate for the first time the full circuit, performance, optimization and operating procedures of a nanosecond pulsed current source (NSPCS) to drive a high-power, high-speed LED array for PAI. The NSPCS driver can deliver tunable pulsed LED currents between 0 and 20 A, pulse widths of 50–100 ns, and trigger pulse repetition rates up to 20 kHz, achieving a driver efficiency of 58.27%. It can drive an array of 37 high-power LEDs (850 nm wavelength) with an electrical-to-optical efficiency of 24.8%. Illumination with this LED array produced a photoacoustic signal (after 79 dB amplification with low-noise amplifier) of 3.92 V (peak-to-peak) and a signal-to-noise ratio of 79.36 dB. The NSPCS circuit has demonstrated effective generation of tunable high-current pulses for LED-based PAI applications.https://doi.org/10.1088/2515-7647/adab59photoacoustic signallight emitting diodeLED arraycircuit designMOSFETnanosecond pulsed current source |
| spellingShingle | Avishek Das Manojit Pramanik Nanosecond pulsed current source for light emitting diode (LED) driven photoacoustic signal acquisition systems JPhys Photonics photoacoustic signal light emitting diode LED array circuit design MOSFET nanosecond pulsed current source |
| title | Nanosecond pulsed current source for light emitting diode (LED) driven photoacoustic signal acquisition systems |
| title_full | Nanosecond pulsed current source for light emitting diode (LED) driven photoacoustic signal acquisition systems |
| title_fullStr | Nanosecond pulsed current source for light emitting diode (LED) driven photoacoustic signal acquisition systems |
| title_full_unstemmed | Nanosecond pulsed current source for light emitting diode (LED) driven photoacoustic signal acquisition systems |
| title_short | Nanosecond pulsed current source for light emitting diode (LED) driven photoacoustic signal acquisition systems |
| title_sort | nanosecond pulsed current source for light emitting diode led driven photoacoustic signal acquisition systems |
| topic | photoacoustic signal light emitting diode LED array circuit design MOSFET nanosecond pulsed current source |
| url | https://doi.org/10.1088/2515-7647/adab59 |
| work_keys_str_mv | AT avishekdas nanosecondpulsedcurrentsourceforlightemittingdiodeleddrivenphotoacousticsignalacquisitionsystems AT manojitpramanik nanosecondpulsedcurrentsourceforlightemittingdiodeleddrivenphotoacousticsignalacquisitionsystems |