Brockton Electro-Optics Corp

Laser Power Controllers,
offering long term beam
power stability better
than .025% rms.

The LPC works with virtually any polarized CW or mode-locked laser. Your laser can now be controlled via front panel controls, aUSB interface, or an analog input jack. A single system can attenuate, stabilize and display laser power. Options are available toaccept external feedback from your own photodiode, PMT or any device of your choosing.

t

Wavelength ranges from 425 to 1700 nmtAttenuation of beam power over a 40:1 rangetStabilizes beam power to 0.025% long termt

Reduction of laser noise from DC up to 5kHzt

Typical low power He-Ne stability: better than 30 ppm over 5 minutest

Power handling up to 4W standard; 65W custom.

The LPC’s precise control of laser power is valuable in numerous applications.
t

Achieve precise powers for single molecule experimentst

Adjustment of laser power without changing lamp currentst

Remove baseline noise and 1/f noise from spectrat

Control beam power with Ti:Sapphire laserst

MetrologytMicroscopy

Typical stability plot with 4mw HeNe laser

LPC Laser Power Controller
The LPC is a patented intensity control system which fits externally in the beam of most lasers .It uses a high-speed liquid crystal element
together with a thermally-controlled monitor photodiode to regulate the beam intensity at a user-selected level (see Figure 2). The LPC
operates by modulating the laser beam, with no connections to the laser itself.
Among the LPC’s features are its compact size and large aperture, making it easy to align. Its liquid crystal modulator allows use withIR lasers, and offers high power handling. A modulation input permits analog selection of the desired output power, while a reference
output provides a signal proportional to the monitor photodiode reading.

Specifications
Clear aperture

4.0 mmTransmittance85%

Long-term stability

0.025% rms

Noise attenuation

200:1 at 1 hz (typical)

Servo bandwidth

up to 5 kHz

Power display accuracy

5% (typical)

Minimum input laser power

0.5 mW

Operating temperature+15oC to + 35oC

Storage temperature-10oC to +45oC

LPC block diagram

General Information:tttOperates with collimated, polarized laser sources, either CW, mode-locked or with pulse rates greater than 50kHz.
Consists of an optics module and rack-mountable electronics module, connect by a 10ft Cable.
Can be controlled from the front panel, or via USB interface. (GPIB interface optional: coming soon)Standard Models

Options and Accessories

LPC-VIS2 for lasers to 4 W, 425-780 nm

RD-40-Vis/NIR, Remote detector for VIS/NIR

LPC-NIR2 for lasers to 4 W, 700-1100 nm

RD-40-IR, Remote detector for IR

LPC-IR2 for lasers to 1 W, 950-1700 nm

RD-40-UV For use with doubled or tripled beams

LPC-VTN2 for lasers 450-900 nm

LPC-GPIB, GPIB interface (coming soon)

Contact us for Custom cofigurations

LPC-IP, input polarzier for use with unpolarized lasers
LPC-EXT-CBL, Extended-length cable set; 20ft
LPC-VIO for use with external detectors and preamps

Custom Capabilities:
The LPC can be customized to work with powers up to 65 watts. Low power operation to 375nm is possible as is operation up to2100nm. Custom OEM units are also available for integration into new or existing systems. Visit our website for additional information.

Warranty:
One year full pars and labor warranty against defects in manufacture or materials.

Brocton Electro-Optics Corp
50 Central Square Suite 3 | Bridgewater, MA 02324
Tel: 508.559.9958 | Fax: 508.861.0214
sales@broctoneo.com | www.brocktoneo.com
Optics module layout

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