IR Lenses

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Colin K. - 23 Nov 2005 05:34 GMT

I need some AR coated lenses for IR. Are there any suppliers that have them
in stock? I am not to picky on the fl as my requirements are flexible.
However I have little power and a good AR coating is essential.

Colin K.

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Peter R Hobson - 23 Nov 2005 09:31 GMT

> Date: Wed, 23 Nov 2005 05:34:29 GMT
> From: Colin K. <colinholo@yahoo.com>
[quoted text clipped - 6 lines]
>
> Colin K.

Perhaps if you gave us some more useful information we could help you!
What wavelength range do you wish to use and what external transmission is
acceptable for your application?

Professor Peter R Hobson
School of Engineering & Design
Brunel University, Uxbridge UB8 3PH G.B.

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Colin K. - 28 Nov 2005 07:22 GMT

> > Date: Wed, 23 Nov 2005 05:34:29 GMT
> > From: Colin K. <colinholo@yahoo.com>
[quoted text clipped - 14 lines]
> School of Engineering & Design
> Brunel University, Uxbridge UB8 3PH G.B.

I am making a 1064nm laser and I need to expand the beam in-between stages.
But as it is a design in progress I am looking for cheap since I will likely
have to redesign a few times. I have lots of 1" mounts so they would be a
good size. Right now I am only working on low power densities but when I get
to designing the last stage I will need to go up to .5G2/cm^2. Or at least
that is the highest power the last optic can handle so nothing will exceed
that. When I have a final design I can then switch the lenses to coatings
for a single frequency.

Colin K.

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redbelly - 28 Nov 2005 12:47 GMT

> I am making a 1064nm laser and I need to expand the beam in-between stages.
> But as it is a design in progress I am looking for cheap since I will likely
[quoted text clipped - 6 lines]
>
> Colin K.

That is a common wavelength, so finding lenses with AR coatings are not
a problem. Thorlabs and CVI are vendors that come to mind. Thorlabs
sells 1" coated lenses for around $30 (US $).

You can ask the vendor about power, and they may very well handle .5
GW/cm^2. Is this a pulsed or cw laser?

Regards,

Mark

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Colin K. - 29 Nov 2005 03:13 GMT

> You can ask the vendor about power, and they may very well handle .5
> GW/cm^2. Is this a pulsed or cw laser?
>
> Regards,
>
> Mark

Well, right now it is an idea, but I am hoping it will become a pulsed
laser. I only need high power on the last two optics. I picked the power not
on my requirements but on the damage threshold of KTP which will be the most
expensive part of the laser.

With surplus parts I think I can get 5J of IR power in a 6mm diameter beam.
Of course this is a back of the envelope calculation. Since I am limited to
surplus parts I have to make certian compromises.

I use Thore Labs often but CVI is new to me and I will check them out.

Thank you,

Colin

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Jonathan Scheuch - 23 Nov 2005 20:52 GMT

Janos Technologies carries IR lenses made from a variety of materials.
They also offer AR coatings for operation in different regions of the
IR.

http://www.janostech.com/

Jonathan Scheuch

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archilles - 23 Nov 2005 21:03 GMT

If you mean near IR like from 700 nm to ~1.5 um, then you can find AR
coated lenses from big suppliers like Newport and Melles Griot and I
would assume they have many items available in stock. However, if what
you are looking for is a far IR lens with AR coating, that would be a
whole another story. You cannot find such lenses everywhere where you
can get a mirror and lens.

arch

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Natural Science Forum / Physics / Optics / November 2005

IR Lenses