Newport PScout2 Series, Руководство пользователя

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6. Troubleshooting and Maintenance
6. Troubleshooting and Maintenance
6.1. Troubleshooting
Error characteristics Possible reason Check and removal
No SHG Signal wrong polarization direction check for horizontal polarization;
introduce a polarization rotator into
the input beam, if necessary
wrong alignment check beam position at input
aperture;
check back re ection at control
window;
check "FOCUS" position;
check phase matching
no input pulses or pulses too long check with an independent method
(fast photodiode, spectral width etc.)
input power too small compare with sensitivity
speci cations
delay zero position outside of check at wider scan ranges;
scan range check and correct for delay
"zero" position (see test report)
No clear ACF wrong scan range check at wider scan ranges
no input pulses or pulses too long check with an independent method
(fast photodiode, spectral width etc.)
SHG Signal non-collinear case wrong alignment of beam on check with shutters (if it reacts to
w / o ACF peak detector each of the shutters);
realign input beam in horizontal
direction only
collinear case wrong "FOCUS" position check and correct for "FOCUS"
position
Delay zero position outside of check at wider scan ranges;
scan range check and correct for delay "0"
position (see test report)
Pulse Scout2 Version 1.1 43 July 2015