Lightwave Communications LDX-3232 manual Common Laser Cathode Photodiode Anode

O P E R A T I O N

Connecting to the Laser

C H A P T E R 2

grounds in the circuit. Multiple earth grounds may provide circuit paths that induce spurious currents in the photodiode feedback circuit and output leads.

Note: Cable connections to the laser must be secure! Loose connections can cause momentary open circuits that can damage the laser.

Figures 2.1 - 2.4 show the possible configurations of connecting laser diodes and photodiodes with the LDX-3232 High Compliance Laser Current Source.

		OUTPUT	LDX-3232 Current Source
		7	+
			Bias
		6	+
			-
		9
		5
P. D.	L. D.	3
			Earth Ground
Figure 2.1		Common Laser Cathode - Photodiode Cathode

		OUTPUT	LDX-3232 Current Source
		7	+
			Bias
		6	+
			-
		9
		5
P. D.	L. D.	3
			Earth Ground

Figure 2.2 Common Laser Cathode - Photodiode Anode

		OUTPUT	LDX-3232 Current Source
		7	+
			Bias
		6	+
			-
		9
		5
P. D.	L. D.	3
			Earth Ground

Figure 2.3 Common Laser Anode - Photodiode Cathode

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