PICOLAS LDP-AV 4N55-90, Руководство пользователя, Страница: 7 / 14

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Connection of the Laser Diode
Figure 1: Dimensions of bonding pads for the laser diode
The LD- and LD+ pads are located in the upper edge of the driver. For the standard
dimensions please refer to the dimensions in Figure 1.
Many elements and parasitic “stray” components may affect the performance of the driver
unit. The stray inductance of the load connected to the driver is very important. The term
“load” not only includes the diode itself but also the packaging (bond wires!) and the
connection between the driver and the diode. However, PicoLAS has no influence on these
parts.
Refer to the PicoLAS Application Notes “Impedance of Diodes” and “LD-Connections”
for more information on parasitic elements and their effect on the pulse shape.
If you need different pad sizes for your laser diode, please do not hesitate to contact
us. Customized pad layouts are possible for adapting the dimensions of your load.
LD-
1.6 x 4.4 mm²
LD+
4 pads with
0.7 x 0.3 mm²
Distance between LD+ and
LD- pad: 0.9 mm
Ch0
Ch1
Ch2
Ch3