Re: Can someone Explain GDD and how it is adjusted? **Commercial Posting**

Posted by Andreas Bruckbauer on
URL: http://confocal-microscopy-list.275.s1.nabble.com/Re-Can-someone-Explain-GDD-and-how-it-is-adjusted-Commercial-Posting-tp7583159p7583164.html

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 It will also depend on the microscope setup. Our system contains an AOM an this contributes about 10,000 fs^2 to the overall GDD which is about 17000 fs^2. A 100 fs pulse would broaden to about 480 fs and a 70 fs pulse to 680 fs without pulse compensation. The spectra-physics Deepsee and Coherent Vision lasers have this built in but i can image that the pulse compensation has to be more carefully adjusted for the shorter pulse, but i have not used a 70 fs pulse yet.

best wishes

Andreas

 

 

-----Original Message-----
From: Craig Brideau <[hidden email]>
To: CONFOCALMICROSCOPY <[hidden email]>
Sent: Thu, 18 Dec 2014 9:12
Subject: Re: Can someone Explain GDD and how it is adjusted? **Commercial Posting**


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If you are also getting a pulse compressor, get the 70fs laser. if you are
not getting a pulse compressor then get the 140fs laser.

Craig
On Dec 17, 2014 6:47 PM, "cycylai" <[hidden email]> wrote:

> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> Post images on http://www.imgur.com and include the link in your posting.
> *****
>
> Dear microscopist,
>
> I'm in a lab which also purchasing new multiphotons laser for intravital
> imaging. We are also in the dilemma of choosing laser of 140fs and 70fs
> which as the white paper suggest would have different fluorescent signal
> intensity and background. Can you the expert share your experience? Thanks
> very much.
>
> Best regards,
>
> Cyril Lai
>
> Faculty Core Facility
> LKS Faculty of Medicine, HKU
>
>
>  ________________________________________
> From: Confocal Microscopy List [[hidden email]] On
> Behalf Of Darryl McCoy [[hidden email]]
> Sent: 18 December 2014 06:28
> To: [hidden email]
> Subject: Re: Can someone Explain GDD and how it is adjusted? **Commercial
> Posting**
>
> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> Post images on http://www.imgur.com and include the link in your posting.
> *****
>
> Dear List Users
>
> The whitepaper we recently produced goes into some detail on this topic,
> and also into
> areas such as peak power, average power and photodamage.
>
> It may be of some use to users not only choosing lasers (type – not
> brand!),  but
> configuring their setups.  It can be downloaded here: http://goo.gl/SzGuaL
>
> Any feedback or comments very welcome.
>
> Best
> Darryl
>
>
> Darryl McCoy | Coherent Inc.
> Acre Rd Glasgow, UK, G20 OXA | Phone: [phone]
> New - Chameleon Discovery: One-box, wide tuning range, dual output laser
> for MPE.
> http://www.coherent.com/chameleon
>