Avantes 785nm Operation Manual - Page 10

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IIa.

Laser Start-Up (External Power Control Mode)

Note: The laser unit is normally designed for operation by interacting with front panel controls, however

users may wish to modulate or adjust the output power of the laser module in some circumstances. The unit

is equipped with an external DC bias port located on the back panel of the module. The following steps

should be taken if the user wishes to control the laser output power remotely via a signal generator or

computer:

Caution—use of controls or adjustments, or performance of procedures other than those specified herein

may result in hazardous radiation exposure.

1. Ensure that the laser is not operating by pressing the laser ON switch and assuring that the laser on

LED is not illuminated.

2. Switch the mode selection switch located on the back panel to the "External" position (the Amber

operating mode LED labeled "External" will be illuminated).

3. Connect a BNC cable to the port labeled "Control" on the back panel. The user may apply a DC bias

between 0 and 1.0 V to modulate the laser or to adjust the laser's output power. 0 V corresponds to

0 power, 1.0 V corresponds to full power. The unit can be modulated at rates up to approximately 1

KHz.

4. Turn on the laser by momentarily depressing the Laser On switch on the front panel. The laser will

now output a variable amount of output power that is dependent upon the DC bias voltage that has

been applied to the Control port on the back panel.

5. The unit can also be controlled via USB using our LCU software with a graphical computer interface

allowing the laser to be turned on and off. It also allows a percentage of the power to be set from 10

to 100%.The power is set by pulse width modulation (PWM) at around 1000 Hz.

III.

The following steps should be followed when shutting down the Laser Module.

1. Depress the Laser On button on the front panel and assure that the Laser On LED is not illuminated.

2. Turn the master power key switch on the back panel counter clockwise from the horizontal "On"

position to the vertical "Off" position.

3. Disconnect fiber patch cord and power cables as needed.

01-04-16

Avantes

AvaRaman Bundle Manual

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