1.
Opt Lett
; 44(5): 1261-1264, 2019 Mar 01.
Article
in English
| MEDLINE
| ID: mdl-30821763
ABSTRACT
With conventional poling techniques of pyroelectric crystals, the thickness of the periodically poled crystals is typically limited to 0.5-1 mm. Such a small aperture of the crystal limits the amount of energy/power that this device may deliver. Here we discuss diffusion bonding as an alternative method to achieve a wider periodically poled crystal, with virtually unlimited width. It is shown that the amplified signal preserved a good beam profile despite a possible phase shift between the stitched crystals. This technique may be extended to larger aperture optical parametric amplifiers and allows for high energy output from periodically poled crystals.