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Chapter 5 Operation Guide
（7）Switch the EE ON applying HIGH to the pin 18.
（8）Wait 5ms.
（9）Laser can be fast modulated via Pin 19 and the laser state of ON or
OFF can be set with a HIGH or LOW input signal respectively. Switching
ON/OFF of the laser has a finite rise/fall time (refer to the specification for
the particular model). The time of the modulation should not be less than
the sum of rise and fall times, otherwise laser optical response may not be
as expected.
（10）If the EM OFF time between subsequent ON/OFF batches (jobs) is
more than 500ms, it is recommended to switch OFF the Emission Enable
pin. This will reduce power consumption, avoid unnecessary aging of the
laser and eliminate the residual MO power at the laser output.
（11） After finishing the laser operation, switch OFF the EM and EE (set
LOW to pin 19 and pin 18).
（12）Remove all power supplies.
2 .Operation Features
（1）PRR can be changed during laser operation with the adjustment of
the signal frequency at the pin 20. The laser has its own internal frequency
generator to ensure correct optical PRR for driving MO. The internal
generator is a “slave” circuit and is controlled by the “master” pulses
applied to the pin 20. Control circuit attempts to synchronize the frequency
and phase of “slave” pulses with “master” pulses by an appropriate
frequency tuning of internal generator. When synchronization pulses of
a stable frequency within a specified range are applied to the pin 20, the
laser synchronizes the frequency and phase of the optical pulses with
the“master” pulses at the pin 20.
（2）If the “master” PRR (pin 20) is higher than the maximum allowed
PRR, the laser will operate at the maximum specified PRR. If the “master”
PRR (pin 20) is lower than the minimum allowed PRR, the laser will
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