Posted by
Andreas Bruckbauer on
URL: http://confocal-microscopy-list.275.s1.nabble.com/Multi-photon-Laser-tp7581421p7581427.html
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This surprises me, our service people always use the power meter, you need to make sure that you are in the linear range of the meter, as you can get several hundred mW of IR power out of the objective with todays lasers.
-----Original Message-----
From: "Claire Brown" <
[hidden email]>
Sent: 19/12/2013 21:57
To: "
[hidden email]" <
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Subject: Re: Multi-photon Laser
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Thanks for your input Craig. Here is a bit more detail about our situation.
Our Zeiss service people tell us they do the calibration using the standard
PMTs in the microscope which only measure up to 700 because of the optical
separation on the 710 (non filter based). So they do the calibration at 699
nm but we want it to be linear out into the IR. We are trying to see if
there is an issue with their calibration technique as it doesn't seem ideal.
That being said when we measure the laser output at 700 nm or 800 nm are not
linear. This is after two service visits and calibrations when the service
people tell us all is fine. So it is unclear if it is a calibration or AOM
issue.
Any input would be appreciated.
Sincerely,
Claire