Coherent DIAMOND Series User Manual

DIAMOND™ C-20 and C-30 Liquid-Cooled Laser Operator’s Manual
5 - 2
Cleanliness of
Output Optical
Element
The laser head must never be activated if the output optical element
is contaminated by water, dust, dirt, or any other contaminant.
Operation of the laser head with any contaminant on the surface of
that optical element may result in damage to the coating. If any
contamination is present, the laser must be returned to Coherent so
the problem can be corrected. The customer’s system design should
also be reviewed to prevent a recurrence of the contamination
problem.
Troubleshooting
Coherent recommends that the following checks be performed
before calling for service.
DC Power
and Voltage
•
Verify that DC power is available to the RF power module.
• Verify that the voltage on Pin 2 of the signal interface
connector is (+15 ± 0.5) VDC, as shown in Table 4-1, “Signal
Interface Description and Connector Pinout,” on page 4-1.
(The location of the signal interface connector is shown, for
example, in Figure 3-1 on page 3-3.)
• If the voltage is not within the specified range, the RF power
module is faulty and the laser must be returned to Coherent.
Control Inputs
•
Verify that the control inputs at the interface connector are set
to appropriate values in accordance with Table 4-1, “Signal
Interface Description and Connector Pinout,” on page 4-1.
• The response times of “RF Enable” and “Control Enable” are
discussed in “Response Times of Laser to RF Enable and
Control Enable” on page 4-7. In Gated CW mode it is
important to use “RF Enable” input to modulate the laser to
obtain short response time.
• The fault detection signals from the RF power module are
discussed in the section titled “Signals Used for Fault Detec-
tion” on page 4-8.
Over-Temperature
Warning
•
If the fault detection signal named “Temperature OK” (Pin 4 in
Table 4-1, “Signal Interface Description and Connector
Pinout,” on page 4-1) is active, troubleshoot the cooling
system to determine why the RF power module appears to be
overheating.

Coherent DIAMOND Series Specifications

General

Brand	Coherent
Model	DIAMOND Series
Category	Measuring Instruments
Language	English