PhotoSonus X

High Output Power DPSS Tunable Laser for Photoacoustic Imaging
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datasheet
  • Integrated DPSS pump laser and OPO system
  • Up to 65 mJ in range 665 – 2600 nm
  • 100 Hz pulse repetition rate
  • Certification ready
  • Quite operation < 65 dB
  • Integrated DPSS pump laser and OPO system
  • Up to 65 mJ in range 665 – 2600 nm
  • 100 Hz pulse repetition rate
  • Certification ready
  • Quite operation < 65 dB

Features & Options

Features

  • Hands-free wavelength tuning from 665 to 1064 nm and 1065 – 2600 nm
  • Fully motorized wavelength tuning
  • Externally triggerable
  • High, up to 65 mJ pulse energy from OPO
  • 100 Hz or 50 Hz pulse repetition rate
  • Low-cost maintenance
  • Certification ready
  • Quite operation < 65 dB
  • Integrated DPSS pump laser and OPO into a single housing
  • Fiber bundle holder with safety interlock
  • Signal and Idler through the same output (optional)
  • Fast Wavelength Switching of up to 300 nm range between two consecutive pulses (optional)
  • Motorized attenuator (optional)
  • Integrated energy meter (optional)
  • Electromechanical output shutter with laser self-test capability (optional)

Description

PhotoSonus X is a perfect solution for photoacoustic imaging in pre-clinical and clinical use and when fast sample scanning is required. Having high output energy of up to 65 mJ at the peak, a broad wavelength tuning range from 665 to 2600 nm, high pulse repetition rate up to 100 Hz and fast wavelength switching makes it a perfect photoacoustic imaging source for gaining high-resolution images and ensuring high data acquisition rate. Moreover, being built on a diode pumped solid-state laser platform, PhotoSonus X assures significantly quieter operation (< 65 dB) compared with flash-lamp pumped lasers, which is very beneficial for clinical use.

Diode pumped laser technology and well-engineered system design ensures high reliability and low-cost system operation. PhotoSonus X output can be coupled with almost any type of fiber bundle.

With additional options of an internal energy meter and electromechanical shutter with laser self-test capability, PhotoSonus X can be ready for certification in clinical photoacoustic applications.

Specifications

MODEL 1) PhotoSonus X
OPO
Wavelength range
    Signal665 – 1064 nm
    Idler (optional)1065 – 2600 nm
OPO output pulse energy 2)>50 mJ at 100 Hz or >65 mJ at 50 Hz
Pulse repetition rate 3) 100 Hz or 50 Hz
Scanning step
    Signal (665 –1064 nm) 0.1 nm
    Idler (1065 – 2600 nm) 1 nm
Pulse duration 4)2 – 5 ns
Signal linewidth 5)< 10 cm-1 at 100 Hz or < 15 cm-1 at 50 Hz
Typical signal beam diameter (1/e²) 6)5 ± 1 mm
Control interfacesUSB, LAN, RS232
PHYSICAL CHARACTERISTICS
CoolingClosed loop air-water cooled 7)
Unit size (W × L × H)551 × 400 × 162 mm
Power supply size (W × L × H)483 × 390 × 140 mm
Umbilical length, m2.5 m
OPERATING REQUIREMENTS
Room temperature18 – 27 °C
Relative humidity20 – 80 % (non-condensing)
Power requirements100 – 240 VAC, single phase 50/60 Hz
Power consumption < 2 kW
  1. Due to continuous improvement, all specifications are subject to change without notice. The parameters marked typical are not specifications. They are indications of typical performance and will vary with each unit we manufacture. Unless stated otherwise all specifications are measured at 700 nm.
  2. Free space measurement at 700 nm. See tuning curves for typical outputs at other wavelengths.
  3. Other fixed pulse repetiton rates are available upon request.
  4. FWHM measured with photodiode featuring 1 ns rise time and 300 MHz bandwidth oscilloscope.
  5. At 700 nm or higher wavelength.
  6. Measured at the free space output at 700 nm wavelength.
  7. Using external chiller.

Note: Laser must be connected to the mains electricity all the time. If there will be no mains electricity for longer that 1 hour then laser (system) needs warm up for a few hours before switching on.

Performance & Drawings

Publications

Found total :
7 articles, 7 selected
Application selected :
All Applications
All Applications
Biomedical – applications focusing on the biology of human health and disease
Photoacoustic Imaging – biomedical imaging modality based on the photoacoustic effect

Image Enchancement Algorithm of Photoacoustic Tomography using Active Countour Filtering

Related applications:  Photoacoustic Imaging Biomedical

Authors:  P. Palaniappan, D. H. Shin, C. G. Song

The photoacoustic images are obtained from a custom developed linear array photoacoustic tomography system. The biological specimens are imitated by conducting phantom tests in order to retrieve a fully functional photoacoustic image. The acquired image undergoes the active region based contour filtering to remove the noise and accurately segment the object area for further processing. The universal vack projection method is used as the image reconstruction algorithm. The active contour filtering is analyzed by evaluating the signal to noise ratio and comparing it with the other filtering methods.

Published: 2016.   Source: World Academy of Science, Engineering and Technology International Journal of Computer and Information Engineering Vol:10, No:4, 2016

Detecting Rat’s Kidney Inflammation Using Real Time Photoacoustic Tomography

Related applications:  Photoacoustic Imaging Biomedical

Authors:  M. Y. Lee, D. H. Shin, S. H. Park, W.C. Ham, S.K. Ko, C. G. Song

Photoacoustic Tomography (PAT) is a promising medical imaging modality that combines optical imaging contrast with the spatial resolution of ultrasound imaging. It can also distinguish the changes in biological features. But, real-time PAT system should be confirmed due to photoacoustic effect for tissue. Thus, we have developed a real-time PAT system using a custom-developed data acquisition board and ultrasound linear probe. To evaluate performance of our system, phantom test was performed. As a result of those experiments, the system showed satisfactory performance and its usefulness has been confirmed. We monitored the degradation of inflammation which induced on the rat’s kidney using real-time PAT.

Published: 2017.   Source: World Academy of Science, Engineering and Technology International Journal of Biotechnology and Bioengineering Vol:11, No:8, 2017

A Custom Developed Linear Array Photoacoustic Tomography for Noninvasive Medical Imaging

Related applications:  Photoacoustic Imaging Biomedical

Authors:  P. Palaniappan, D. H. Shin, S. H. Park, M. Y. Lee, B. Y. Kim, S. Y. Lee, S. K. Go, C. G. Song

A real-time photoacoustic tomography which is capable of imaging the changes in biological features of living subject is presented. A custom developed data acquisition board and linear array transducer is used in this photoacoustic system. A phantom test were carried out to evaluate performance of the system. The developed system showed a satisfactory performance and its usefulness were evaluated. The universal back projection algorithm is used for image reconstruction and the sensitivity is analyzed from the obtained photoacoustic images.

Published: 2016.   Source: Event: 2016 IEEE International Conference on Consumer Electronics-Asia (ICCE-Asia)

Photoacoustic signal detection using interferometric fiber-optic ultrasound transducers

Related applications:  Photoacoustic Imaging Biomedical

Authors:  A. D. Salas-Caridad, G. Martínez-Ponce, R. Martínez-Manuel

The cross-section of a metallic sample was photoacoustically imaged using a pulsed nanosecond laser as the excitation source and a fiber-optic hydrophone system to acquire the pressure signal. The ultrasound sensor was an extrinsic Fabry-Perot fiber-optic interferometer and the band-limited photodetected output signal was recorded in a digital oscilloscope. In order to reconstruct the image, a time set of ultrasound signals acquired in a circular scan around the sample were used to solve the time-reversal equations. It was observed that image contrast can be enhanced considering the deconvolution of the sensor frequency response from each measured pressure signal.

Published: 2017.   Source: Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Hydrophones based on interferometric fiber-optic sensors with applications in photoacoustics

Related applications:  Photoacoustic Imaging Biomedical

Authors:  A. D. Salas-Caridad, B. Eng.

Biomedical imaging used for medical diagnosis constantly requires improvement in the characteristics for imaging devices. The sensing devices are one of the most important pieces to improve in order to get images with better quality. In this thesis, it is proposed the use of interferometric fiber-optic sensors (which offer the advantages inherent to optical fibers) as devices to detect pressure/acoustic signals generated by the photoacoustic effect. It is explored the capability of using fiber-optic interferometric hydrophones in order to determine the thickness of a material derived from the acoustic signal generated when a sample is illuminated. In addition, the analysis of photoacoustic signals generated by the excitation of nanoparticles of an anisotropic material as absorption centers. Finally, the cross-section of a metallic sample was photoacoustically imaged by acquiring the pressure signals generated.

Published: 2017.   Source: Master of Optomechatronics | Leon, Guanajuato, Mexico

Enhancement of objects in photoacoustic tomography using selective filtering

Related applications:  Photoacoustic Imaging Biomedical

Authors:  D. Shin, Y. Yang, C. G. Song

Here we developed a real-time photoacoustic tomography (PAT) imaging acquisition device based on the linear array transducer utilized on ultrasonic devices. Also, we produced a phantom including diverse contrast media and acquired PAT imaging as the light source wavelength was changing to see if the contrast media reacted. Indocyanine green showed the highest reaction around the 800-nm band, methylene blue demonstrated the same in the 750-nm band, and gold nanoparticle showed the same in the 700-nm band. However, in the case of superparamagnetic iron oxide, we observed not reaction within the wavelength bands used herein to obtain imaging. Moreover, we applied selective filtering to the acquired PAT imaging to remove noise from around and reinforce the object’s area. Consequentially, we could see the object area in the imaging was effectively detected and the image noise was removed.

Published: 2015.   Source: Bio-Medical Materials and Engineering 26 (2015) S1223–S1230

Hybrid Photoacoustic/Ultrasound tomograph for real time finger imaging

Related applications:  Photoacoustic Imaging Biomedical

Authors:  M. Oeri, W. Bost, N. Sénégond, S. Tretbar, M. Fournelle

We report a target-enclosing, hybrid tomograph with a total of 768 elements based on capacitive micromachined ultrasound transducer technology and providing fast, high-resolution 2-D/3-D photoacoustic and ultrasound tomography tailored to finger imaging.A freely programmable ultrasound beamforming platform sampling data at 80 MHz was developed to realize plane wave transmission under multiple angles. A multiplexing unit enables the connection and control of a large number of elements. Fast image reconstruction is provided by GPU processing. The tomograph is composed of four independent and fully automated movable arc-shaped transducers, allowing imaging of all three finger joints. The system benefits from photoacoustics, yielding high optical contrast and enabling visualization of finger vascularization, and ultrasound provides morphologic information on joints and surrounding tissue. A diode-pumped, Q-switched Nd:YAG laser and an optical parametric oscillator are used to broaden the spectrum of emitted wavelengths to provide multispectral imaging. Custom-made optical fiber bundles enable illumination of the region of interest in the plane of acoustic detection. Precision in positioning of the probe in motion is ensured by use of a motor-driven guide slide. The current position of the probe is encoded by the stage and used to relate ultrasound and photoacoustic signals to the corresponding region of interest of the suspicious finger joint. The system is characterized in phantoms and a healthy human finger in vivo. The results obtained promise to provide new opportunities in finger diagnostics and establish photoacoustic/ultrasoundtomography in medical routine.

Published: 2017.   Source: Ultrasound in Med. & Biol., 2017

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