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Linear Laser Diode Drivers

Photonics.com
Jun 2011
Wavelength Electronics Inc.Request Info
 
BOZEMAN, Mont., June 8, 2011 — Wavelength Electronics Inc.’s PLD-CH chassis mount series is now available in a 12.5-A model, the PLD12.5K-CH. This compact linear laser diode driver supports the fiber-coupled lasers used in applications such as medical, dental, micromachining, materials processing, imaging and semiconductor inspection.

The PLD-CH series offers low-voltage operation from a 5-VDC supply, which minimizes heat dissipation. For applications that require a higher forward voltage, a separate laser diode power supply input allows for flexible compliance voltages up to 28 VDC.

Safety features include a slow start circuit, a mechanical shorting relay and active current limit. These offer maximum protection for the laser diode, even when power is removed. The active current limit ensures that it is operating with maximum stability. Two photodiode ranges provide variable sensitivities for optimum performance. Good stability is maintained in both constant-current and constant-power modes.

The PLD-CH series supports all laser diode/photodiode pin configurations. The 12.5-A model has a 50-kHz bandwidth with <0.05% output stability, 1-h stability of <200 ppm and a <200 ppm/ºC temperature coefficient.

Other features include remote enable/disable, remote monitoring and analog modulation of set point current. Drivers can be paralleled for up to 25 A of stable output current


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