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US 11,693,167 B2Granted
System and method for improving the laser damage threshold of multilayer dielectric gratings
AssigneeLawrence Livermore National Security, LLC
InventorsHoang T. Nguyen, Jerald A. Britten
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Abstract
A system configuration that significantly improves the laser damage threshold of multi-layer dielectric gratings for lasers applications includes three main sections: 1) a laser module, 2) a TM polarization module, and 3) a multi-layer dielectric grating optimized for high efficiency operation with transverse magnetic polarized laser light.
Claims29
A system, comprising:
- means for providing polarized light;
- a transverse magnetic (TM) polarization optimized multilayer dielectric (MLD) grating arranged for operating at a first center wavelength;
- and
- means for directing said polarized light onto said TM polarization optimized MLD grating such that said light is TM polarized relative to said grating,
- wherein said TM polarization optimized MLD grating comprises:
- a grating pillar structure having a first profile width and a first grating profile height, wherein said first profile width and said first grating profile height are respectively wider and taller than those of a transverse electric (TE) polarization optimized multilayer dielectric (MLD) grating arranged for operating at said first center wavelength;
- and
- a multilayer structure supporting said pillar structure, wherein said multilayer structure comprises alternating index dielectric materials and has a bandwidth that is adjusted for TM polarization.
5 more elements
A method, comprising:
- directing polarized light onto a transverse magnetic (TM) polarization optimized multilayer dielectric (MLD) grating such that said light is TM polarized relative to said grating,
- wherein said transverse magnetic (TM) polarization optimized multilayer dielectric (MLD) grating is arranged for operating at a first center wavelength and comprises:
- a grating pillar structure having a first profile width and a first grating profile height, wherein said first profile width and said first grating profile height are respectively wider and taller than those of a transverse electric (TE) polarization optimized multilayer dielectric (MLD) grating arranged for operating at said first center wavelength;
- and
- a multilayer structure supporting said pillar structure, wherein said multilayer structure comprises alternating index dielectric materials and has a bandwidth that is adjusted for TM polarization.
2 more elements
A transverse magnetic (TM) multilayer dielectric (MLD) grating arranged for operating at a first center wavelength, said grating comprising:
- a grating pillar structure having a first profile width and a first grating profile height, wherein said first profile width and said first grating profile height are respectively wider and taller than those of a transverse electric (TE) multilayer dielectric (MLD) grating arranged for operating at said first center wavelength;
- and
- a multilayer structure supporting said pillar structure, wherein said multilayer structure comprises alternating index dielectric materials and has a bandwidth that is adjusted for TM polarization.
Dependencies are inferred from the claim text.