Phocus Mini

The Phocus Mini is a scaled down version of the Phocus with nanosecond, NIR pulse energies for photoacoustic imaging applications that require less power. The entire laserhead fits into a 7x12” footprint and ships completely sealed to protect optical components from the environment. Requiring no installation, the system includes verification hardware to check alignment after shipping or relocation. The Phocus Mini eases integration of the light source inside commercial instrumentation with space constraints.

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Wavelength Range [nm]:

690 – 950

Peak OPO Energy [mJ]:

See tuning curve

Spectral Linewidth [cm-1]:

30 – 100

Beam Divergence [mrad]:

10 (FWHM, full angle)

Linear Polarization:


UV Tuning [nm]:


Residual Pump Energy [mJ]:


Dimensions [in (mm)]:

12.0 (305) x 7.0 (178) x 4.9 (125)

Pump Wavelength [nm]:


Repetition Rate [Hz]:


Pulse Length [ns]:


Beam Diameter [mm]:

3 or 4

Trigger Connections:


PSU Dimensions [in(mm)]:

17.2 (435) x 14.2 (360) x 5.25 (133)

PSU Cooling:

Closed-loop air-water cooled

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Option 2 Group

Access to pump laser wavelengths

Residual 1064 nm pump laser wavelength exits the system from a front aperture simultaneous with OPO laser light. External beam dumps block the light when not in use. The amount of residual pump laser wavelength energy varies depending on the harmonic or OPO conversion efficiency. Access to the residual OPO pump laser wavelength comes included by default.

Option 3 Group

Fiber Delivery Kit

Simplify delivery of tunable laser light by choosing the Fiber Delivery Kit. Propagation of laser light through an optical fiber 'homogenizes' the beam and transform the profile into a flat top-hat. A flexible metal sheath protects the fiber.  The transmission percentage depends on the coupling efficiency into the fiber. The Fiber Delivery Kit includes the 2.5 m long, 1 mm diameter optical fiber with 0.22 NA, focusing/imaging optics/mounts and SMA on input/output connectors. End-user installs fiber hardware outside the system following alignment instructions. Removal of fiber hardware allows free-space access. Integrated, alignment-free fiber delivery available upon request (no free-space access).

Option 4 Group

Access to Idler

Extend the tunable range of the Phocus system further into the near-infrared with access to the Idler. All tunable beams exit the system from the same port. Option includes automated range selection for seamlessly switching between Signal and Idler and continuous scan over the entire tunable range.

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. Choice of internal (10% optical loss at max) or external (removable for full access to OPO energy).

Option 6 Group

Real-time Wavelength Monitoring and Auto Harmonic Optimization

The option includes a built-in wavemeter combined with motorized harmonics. The wavemeter provides real time measurement of the OPO wavelength, which is displayed in the control software screen. The option allows closed-loop tuning of the OPO , which provides better than 1 nm accuracy of the Signal wavelength. In addition, the wavemeter signal serves as a feed-back reference, which can be used to optimize the phase-matching of the harmonics.  Complete automation of phase matching simplifies the procedure to a single click through the Harmonics Auto-optimization software command (included).

Option 9 Group

Rackmount power supply

Choice of standard bench-top power supply and OPO control electronics box (default) or 19" rackmountable versions.

Option 10 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.

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