Power-On State; Connections For General Operation; Table 3.1 Ldx-36000 Series Default Configuration - ILX Lightwave LDX-36000 Series User Manual

3
C H A P T E R

Power-On State

The last saved instrument state may be cleared by recalling the default values.
These values are stored in bins from which instrument configurations (described
in more detail in Chapter 4) are set. Bin 0 is a read-only location and resets the
instrument to the default parameters listed in Table 3.1.

Table 3.1 LDX-36000 Series Default Configuration

GPIB mode in LOCAL via front panel, or in REMOTE
via GPIB
Left-hand display displaying laser current
Right-hand display displaying pulsewidth
Mode = QCW
QCW Mode = PULSE
Current Limit Setpoint (Lim I) = ½ full scale (value
dependent on model)
Voltage Limit Setpoint (Lim V) = 5 V
Temperature Limit Setpoint (Lim T) = 30°C
Pulsewidth = 100 µs
Frequency = 100 Hz
Current Setpoint = 0.0 A

Connections for General Operation

When connecting a laser diode to the LDX-36000 Series current source, it is
recommended that the instrument be powered up and the output disabled. In this
condition, a low impedance shunt is active across the output terminals. When
disconnecting devices, it is only necessary to disable the output. The low
impedance shunt exists across the output terminals with the power to the
instrument off as well.
We recommend low resistance and inductance cabling for operation of the LDX-
36000 in CW, QCW, and Hard Pulse modes. For best performance in any of
these instrument modes we recommend the ILX CC-390 or CC-395 cable. These
are flat copper cables with low inductance and resistance that connect directly to
the instrument through the rear panel connector. We also recommend that the
end of the cable be as close to the laser as possible. Stranded wire cables can be
used for operation in CW mode only. The proper wire gauge should be used to
minimize heating and twisted from the instrument to the laser to minimize
inductance as a result of the loop of conductive wire formed between the
instrument and the laser.
24
 LDX-36000 Series
O P E R A T I O N
Connections for General Operation
Laser Output = OFF
-3
C = 1.125 (x10 )
1
-4
C = 2.347 (x10 )
2
-7
C = .855 (x10 )
3
Laser Current Step = 0.01A
Laser P Setpoint = 0.0 W
Cal P = 0.1 W/A, 0.0 A
Cal PD = 0.0 mA/W