User’s guide Ytterbium Pulsed Fiber Laser RFL-P20MB Ver.: 2.0
Figure 6 DB25 sequence diagram
T1
：
Represent the initialization time of the laser machine. The initialization time is less than
10s from power-on to perform initialization.
T2
：
Represent the pump recharge time, usually around 5ms.
T3
：
Represent the frequency switching time. Frequency needs to be adjusted before optical
laser output, and the switching time should not less than 5ms.
T4
：
Represent the pulse build-up time. Usually the build-up time is less than 200 us from
the pump current raising up to reach the 90% power of the optical pulse.
T5
：
Represent the pulse shut down time. Usually the shut down time is less than 100 us
from the pump current decliner to drop to the 10% power of the optical pulse.
6)
Definition of alarm signal
Table 5 Definition of warning signal
PIN12
PIN11
PIN16
PIN21
Alarm content
X
Low
Low
Low
Laser Temperature
Warning
1
X
Low
Low
High
Normal
X
High
Low
Low
Abnormal State
2
X
Low
High
High
Main Oscillator Error
3
PS 1
：
PIN 17 receives external DC voltage to provide power supply for alarm signal. Therefore,
please make sure PIN17 is connected to the +5V
power supply. The temperature warning will
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