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HORIBA Jobin Yvon has pioneered the design and development of pulse compression gratings using holographic techniques. By carefully designing the grating groove parameters, gold-coated pulse compression gratings can achieve diffraction efficiencies as high as 94% at either 800 nm or 1.053 µm. In addition, the holographic manufacturing technique can produce very large gratings that demonstrate an excellent stability and quality of the diffracted wavefront.
Master Pulse Compression Gratings
In CPA lasers where the highest optical performance and damage thresholds are required, a master gold-coated holographic grating ensures best performance. Master gratings are the technology of choice for large-area gratings, and HORIBA Jobin Yvon currently supplies several standard sizes up to 210x420 mm . Standard groove densities include 1200, 1480, 1740 and 2000 lines/mm, for operation at 800 nm or 1053 nm. Custom sizes can be considered up to 500x500 mm, and alternate groove densities, non-standard wavelength optimization, and/or larger grating sizes will be reviewed upon request.
Features
- Optimized holographic ruling
- Gold layer coating
- Highly polished blanks
- Large range of standard and custom sizes for all groove densities
Benefits
- High diffraction efficiency with minimal light absorption
- High damage threshold
- Maintains wavefront quality
- Can be matched to your compression and pulse energy requirements.
Guaranteed specifications:
- Efficiency:
90% average absolute efficiency at 800 nm or 1053 nm in near-Littrow configuration (10° deviation angle between the incident and diffracted beams).
- Wavefront quality:
better than l/4 at 800 nm or at 1 053 nm in the -1 diffracted order..
Ordering information:
- Five standard groove densities
- Eight standard sizes
- Optical coating: gold (included)
Delivered documentation with master pulse compression gratings
For large gratings (165x220 mm and larger):
- Absolute efficiency, measured in nine spots distributed over the clear aperture of the grating
- Interferograms of -1 order and 0-order wavefronts
- A certificate of conformity
For small gratings:
- Absolute efficiency, measured in the center of the grating
- Quality of the -1 order diffracted wavefront
- A certificate of conformity
Typical Holographic Master Efficiencies for Pulse Compression
 1200 g/mm, 800 nm, Dev=10°, inc. angle=23.8°, TM, Au |
 1200 g/mm, 1050 nm, Dev=10°, inc. angle=44°, TM, Au |
 1480 g/mm, 800 nm, Dev=10°, inc. angle= 31.5°, TM, Au |
 1480 g/mm, 1050 nm, Dev=10°, inc. angle=46.3°, TM, Au |
 1740 g/mm, 800 nm, Dev=10°, inc. angle=39.3°, TM, Au |
 1740 g/mm, 1050 nm, Dev=10°, inc. angle=61.5°, TM, Au |
 2000 g/mm, 800 nm, Dev=10°, inc. angle=48.4°, TM, Au |
NOTE:
These efficiency curves are absolute theoretical efficiencies, calculated using rigorous electromagnetic theory, taking into account the true groove profiles of manufactured gratings measured with an atomic force microscope (AFM).
These curves are for reference only and do not indicate grating specifications.
The efficiency can vary significantly depending upon the usage geometry.
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 Typical absolute efficiency vs Incidence Angle 1740 gr/mm - coating Au, Wavelength = 800 nm TM polarisation (Littrow angle = 44.1°) |
