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High power gratings

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High power transmission grating High power transmission grating
Fused silica transmission gratings offer an order of magnitude higher power handling capability than any other grating technology including conventional Au-coated reflection gratings.

While specific substrate materials and optional AR coatings may differ, all Ibsen gratings are based on fused silica, with excellent transmission characteristics in all wavelength regions - from below 200 nm to above 2000 nm.

All the below grating products are therefore ideal for high power applications, and we furthermore manufacture custom gratings for many different niche applications:

"High power applications" is a broad term; power damage threshold cannot easily be stated in just one or two numbers. Furthermore, to date we do not have information of any power level that has in fact caused damage to our gratings. The table below therefore provides compiled experimental data provided by customers/partners.

Sample illuminations - below damage threshold

Wavelength Operation Pulse energy Pulse length Beam diameter Peak power Rep rate Reference
1064 +/- 20 nm Pulsed 1.5 μJ 5 ps 1-2 mm 17 MW/cm2 100 MHz
1064 nm Pulsed/CW 1 μJ 100 fs 10-20 mm 5,6 MW/cm2 40 GHz
1064 nm Pulsed, input 150 nJ 10 ps 0.75-1 mm 2,5 MW/cm2 80 MHz NKT Research
1064 nm Pulsed, output 87 nJ 500 fs 0.75-1 mm 30 MW/cm2 80 MHz NKT Research
1064 nm CW N/A N/A 1.6 mm 80 kW/cm2 N/A
975 nm CW N/A N/A ~0.2 mm 250 kW/cm2 N/A
808 nm CW N/A N/A ~1.4 mm 65 kW/cm2 N/A
800 nm Pulsed 2.1 mJ 70 fs 5 mm 150 GW/cm2 1 kHz Temple University, CAPR
800 nm Pulsed 2.0 mJ 100 fs 6x8 mm 40 GW/cm2 1 kHz Sincrotrone Trieste
264 nm Pulsed 300 μJ 220 fs 3 mm (before 1D focusing) 19 GW/cm2 27 Hz University College Cork
248 nm Pulsed 55 mJ/cm2 500 fs N/A 100 GW/cm2 10 Hz FORTH-IESL
248 nm Pulsed 105 mJ/cm2 5 ps N/A 20 GW/cm2 10 Hz FORTH-IESL

Temple University, provider of one of the results above, has graciously allowed us to make their full test report available here:

Temple University test report

We will be adding to this table as we receive further results from our customers - please send us any such data you have - we are especially interested in hearing of any acheived power levels that actually have led to grating damage! We are equally happy to reference you or not as you prefer.

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Created by kjb
Last modified 2008-08-18 15:16
 
 
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