User’s guide Ytterbium Pulsed Fiber Laser RFL- P100M Ver.: 2.0
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3.
Control Interface
There are DB9 and DB25 interfaces at the rear of the laser. The DB9 is a RS232 interface
only used for debugging, no needs to connect. And DB25 is the joint interface connecting control
system to the laser system, please make sure the connection is reliable before operation. Feet of the
DB25 are defined as follows in Fig. 5.
Figure 5. Connect port of controller
Table 3 Definition of connect ports of controller
PIN No.
Name
Description
1-8
(D0-D7)
Power Setting
8 bit Parallel port;
D0 is minimum bit and D7 is maximum bit;
Range: 0-255 (hexadecimal: 0X00-0XFF).
10,14
Ground
Digital GND.
11,12,16,21
Laser alarms status
see alarm codes in table 5.
17
VCC
+5VDC power supply input for independent operation
of the guide laser and PCB
18
EE
Emission Enable (EE) signal.
HIGH(>3V): Emission Enable
LOW or disconnected (<1V): Emission Disable
19
EM
Emission Modulation (EM) input.
HIGH (>3V): Emission ON
LOW or disconnected (<1V): Emission OFF
20
Sync
Pulse Repetition Rate (Synchronization) input, square
wave.
22
Guide Laser signal
(pulse duration control enable signal)
Guide Laser (red diode) ON/OFF input.
Definition of pulse duration control is shown in table 5.
9,23
Obligate PIN
Reserved
1)
The pump current of diode laser and the laser output power are controlled by setting the
value of PIN1-PIN8 (TTL level). PIN1-PIN8 can be set from 0
～
255
，
corresponding to the
