Double-resonance grating mirror for polarization control in solid-state lasers

✍ Scribed by M. A. Ahmed; Th. Graf

• Book ID: 102444888
• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 87 KB
• Volume: 3
• Category: Article
• ISSN: 1612-2011
• DOI: 10.1002/lapl.200510088

✦ Synopsis

The spectral width of the polarizing effect of a
coupling grating on a standard quarter-wave multilayer laser
mirror can be increased by applying dual-duty-cycle gratings. As
an example this is discussed considering the requirements to
polarize a Yb:YAG thin-disk laser. By applying dual-duty-cycle
gratings the spectral tolerance can be widened by a factor of two
as compared to single-duty-cycle designs and at the same time
achieve a high reflectivity and low losses for the oscillating
polarized laser mode. The calculations of the structures were
carried out with the help of an exact modelling code based on the
modal method. The code simulates the interaction of a plane
electromagnetic wave with the corrugated multilayer structure to
compute amplitude and power of all reflected and transmitted
diffraction waves.