SF57 rods for spectral focusing CARS

[Johanna Traegaardh]

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Dear all,

We are working with spectral focusing for CARS, and are thinking about
replacing the grating-based pulse strecher with a long piece of higly
dispersive glass (SF57 or similar).

Does anyone know of a company that would be able to polish the end
facets of the rather long (>10 cm at least) glass rods? That also do
small volume orders (since we only need two or possibly three rods).

Kind regards,
Johanna


--
--
Dr. Johanna Traegaardh

[hidden email]


Institute of Scientific Instruments of the CAS, v.v.i.
Czech Academy of Sciences
Kralovopolska 147
612 64 Brno
Czech Republic

[phone]

[Giuseppe de Vito]

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We bought these objects for the same purpose (spectral-focusing for
CARS) from the manufacturer: "SOLID Photonics Technology". The quality
was good and they accept also orders for very small batches.
Greets

Giuseppe

On 10/02/2020 11:49, Johanna Traegaardh 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 all,
>
> We are working with spectral focusing for CARS, and are thinking about
> replacing the grating-based pulse strecher with a long piece of higly
> dispersive glass (SF57 or similar).
>
> Does anyone know of a company that would be able to polish the end
> facets of the rather long (>10 cm at least) glass rods? That also do
> small volume orders (since we only need two or possibly three rods).
>
> Kind regards,
> Johanna
>
>

[Wilson Adams]

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I purchased our SF11 glass rods (AR-coated) from Newlight Photonics for
spectral focusing CARS/SRS. Very happy with them for the last couple years.
I use about 150mm of glass to chirp, and I get about 20cm-1 resolution. I'm
sure it can be optimized better, but it does the trick for what we need
right now.

The grating approach will get you much better spectral resolution. But if
that's not a huge concern for you, the glass rod approach is very
straightforward to implement.

-Wilson

On Mon, Feb 10, 2020 at 10:02 AM Giuseppe de Vito <[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.
> *****
>
> We bought these objects for the same purpose (spectral-focusing for
> CARS) from the manufacturer: "SOLID Photonics Technology". The quality
> was good and they accept also orders for very small batches.
> Greets
>
> Giuseppe
>
> On 10/02/2020 11:49, Johanna Traegaardh 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 all,
> >
> > We are working with spectral focusing for CARS, and are thinking about
> > replacing the grating-based pulse strecher with a long piece of higly
> > dispersive glass (SF57 or similar).
> >
> > Does anyone know of a company that would be able to polish the end
> > facets of the rather long (>10 cm at least) glass rods? That also do
> > small volume orders (since we only need two or possibly three rods).
> >
> > Kind regards,
> > Johanna
> >
> >
>

[Craig Brideau]

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Hi Guiseppe, big fan of your work. Johanna:  I came up with a compact
folded design that allows extreme chirp with easy alignment. I started out
with glass rods but found them too difficult to work with. Instead I
designed and manufactured a retro-reflecting prism that propagated the beam
internally, while maintaining normal entrance and exit angles to avoid
spatial chirp. They worked exceedingly well. Here's a link to my open
access paper for the entire system, but check out sections 3.2 and 4.1 for
details on my dispersion control system.
https://www.spiedigitallibrary.org/journals/journal-of-biomedical-optics/volume-24/issue-04/046502/Excitation-parameters-optimized-for-coherent-anti-Stokes-Raman-scattering-imaging/10.1117/1.JBO.24.4.046502.full

Craig

On Mon, Feb 10, 2020 at 9:02 AM Giuseppe de Vito <[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.
> *****
>
> We bought these objects for the same purpose (spectral-focusing for
> CARS) from the manufacturer: "SOLID Photonics Technology". The quality
> was good and they accept also orders for very small batches.
> Greets
>
> Giuseppe
>
> On 10/02/2020 11:49, Johanna Traegaardh 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 all,
> >
> > We are working with spectral focusing for CARS, and are thinking about
> > replacing the grating-based pulse strecher with a long piece of higly
> > dispersive glass (SF57 or similar).
> >
> > Does anyone know of a company that would be able to polish the end
> > facets of the rather long (>10 cm at least) glass rods? That also do
> > small volume orders (since we only need two or possibly three rods).
> >
> > Kind regards,
> > Johanna
> >
> >
>