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公开(公告)号：US11719993B2
公开(公告)日：2023-08-08
申请号：US17415090
申请日：2019-12-18
发明人： Valentin Gapontsev , Aleksander Cherepakhin , Anatolii Zamkov , Nikolay Evtikhiev , Dan Perlov , Aleksander Zaytsev , Andrey Sadovskiy , Nikita Radionov
IPC分类号： G02F1/355 , G02F1/37 , G02F1/39 , H01S3/00 , H01S3/11 , H01S3/23 , G02F1/35 , G02F1/377 , H01S3/109
CPC分类号： G02F1/3551 , G02F1/3501 , G02F1/353 , G02F1/354 , G02F1/355 , G02F1/3558 , G02F1/37 , G02F1/3775 , G02F1/39 , H01S3/0092 , H01S3/109 , H01S3/11 , H01S3/2308
摘要： The disclosed laser system is configured with a laser source outputting light at a fundamental frequency. The output light is incident on a frequency converter operative to convert the fundamental frequency to a higher harmonic including at least one frequency converting stage. The frequency converter is based on a SrB4O7 (SBO) or PbB4O7 (PBO) nonlinear crystal configured with a plurality of domains. The domains have periodically alternating polarity of the crystal axis enabling a QPM use and formed with each with highly parallel walls which deviate from one another less than 1 micron over a 10 mm distance.
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公开(公告)号：US11868022B2
公开(公告)日：2024-01-09
申请号：US17415211
申请日：2019-12-16
发明人： Dan Perlov , Alexander Zaytsev , Anatolii Zamkov , Nikita Radionov , Aleksandr Cherepakhin , Nikolay Evtikhiev , Andrey Sadovskiy
CPC分类号： G02F1/3551 , C30B29/22 , C30B33/00 , G02F1/354 , G02F1/3548 , H01S3/109
摘要： An SrB4O7 or PbB4O7 crystal is configured with a plurality of domains with respective periodically alternating polarity of the crystal axis so that the disclosed crystal is capable of quasi-phasematching (QPM). The disclosed crystal is manufactured by a method including patterning a surface of a crystal block of SrB4O7 or PbB4O7, thereby providing patterned uniformly dimensioned regions with a uniform polarity sign on the surface. The method further includes generating a disturbance on the patterned surface, thereby inverting a sign of crystal polarity of every other region to form the SrB4O7 or SrB4O7 crystal with a plurality of domains with alternating polarity enabling a QPM mechanism.
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