Phocus Core

The Phocus Core is a stream-lined low cost system that provides the essential features required from a photoacoustic imaging source. The Phocus Core is specifically designed for OEM applications and for integration with systems with space constrains. The OPO design is based on patented “ring-cavity” optical parametric oscillator (OPO) technology. The design increases the OPO damage threshold while maintaining high efficiency, delivering nanosecond pulses with energies of over 125 mJ. High damage thresholds combined with minimal maintenance and turn-key operation reduces system down-time and allows ease of operation for pre-clinical applications. The basic configuration provides motorized harmonics and access to the residual 1064 and 532 nm pump laser wavelengths. Customizable form factors and optional fiber bundles provide the flexibility to integrate the light into commercial instrumentation.

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Wavelength Range [nm]:

690 – 950

Peak OPO Energy [mJ]:

See tuning curve

Spectral Linewidth [cm-1]:


Beam Divergence [mrad]:

10 (FWHM, full angle)

Linear Polarization:


UV Tuning [nm]:


Residual Pump Energy [mJ]:


Dimensions [in (mm)]:

24 (610) x 12 (305) x 9 (230)

Pump Wavelength [nm]:


Repetition Rate [Hz]:

10 or 20

Pulse Length [ns]:


Beam Diameter [mm]:

6 or 9

Trigger Connections:


PSU Dimensions [in(mm)]:

20 (508) x 11 (279) x 20 (508)

PSU Cooling:

Closed-loop air-water cooled

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Option 1 Group

Energy Level

The Phocus Core can be configured for two energy levels, as presented in the tuning graphs. Select the desired configuration based on the graph. The outside dimensions are identical.

Option 2 Group

Software Development Kit

Software Development Kit (SDK) that allows end-users to integrate system control functions into third-party software can be downloaded for no charge. The SDK works under most Windows-based programming environments and provided with limited technical support.

Option 3 Group

Fast Tuning

This option (patent pending) enables fast switching of the output wavelength such that each consecutive pulse can be set to any wavelength within the wavelength range of the system. The user can enter a sequence of wavelengths into the control software, with any step size (zero to full range) in any order, and the system will generate these wavelengths pulse after pulse. It can be set to stop after a single sequence or to repeat the sequence as defined by the end-user.

Option 4 Group

Fiber Bundle

The desired method for coupling the tunable laser light to the photoacoustic target is through a fiber bundle. This allows for flexible system architecture, separating the laser source from the biological sample. Integrating the fiber bundle in the system will increase its length by 7”. Approximately 70% of the tunable laser light transmits through the fiber bundle. The standard Fiber Bundle option includes a 2 m long, 5 mm input/output diameter optical bundle with 0.37 NA, focusing/imaging optics and their mounts. Inquire about customizable fiber bundles with different geometries and multiple output arms.

Option 5 Group

Motorized Variable Attenuator

Vary the OPO pulse energy by choosing the Motorized Variable Attenuator (MVA) option. By default the end-user changes the OPO pulse energy by changing the pump laser pulse energy through software command. However, OPO pulse-pulse energy instability increases at lower pump laser energy levels. The MVA option involves maintaining the pump laser pulse energy at maximum and using optical attenuation to change the OPO pulse energy without compromising energy stability. The MVA option connects through the electronics unit for computer control. Placement of the attenuator results in about 10% optical loss. If needed the MVA can also be removed for full energy access and reinstalled without need for alignment. Adding the MVA in the system will increase its length by 7”.

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