	US 11,868,022 B2
	Method for manufacturing of patterned SrB₄BO₇and PbB₄O₇crystals
Dan Perlov, Oxford, MA (US); Alexander Zaytsev, Oxford, MA (US); Anatolii Zamkov, Oxford, MA (US); Nikita Radionov, Oxford, MA (US); Aleksandr Cherepakhin, Oxford, MA (US); Nikolay Evtikhiev, Oxford, MA (US); and Andrey Sadovskiy, Oxford, MA (US)
Assigned to IPG PHOTONICS CORPORATION, Marlborough, MA (US)
Appl. No. 17/415,211
Filed by IPG PHOTONICS CORPORATION, Oxford, MA (US)
PCT Filed Dec. 16, 2019, PCT No. PCT/US2019/066439 § 371(c)(1), (2) Date Jun. 17, 2021, PCT Pub. No. WO2020/131652, PCT Pub. Date Jun. 25, 2020.
Claims priority of provisional application 62/781,371, filed on Dec. 18, 2018.
Prior Publication US 2022/0066284 A1, Mar. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02F 1/355 (2006.01); G02F 1/35 (2006.01); C30B 29/22 (2006.01); C30B 33/00 (2006.01); H01S 3/109 (2006.01)

CPC G02F 1/3551 (2013.01) [C30B 29/22 (2013.01); C30B 33/00 (2013.01); G02F 1/354 (2021.01); G02F 1/3548 (2021.01); H01S 3/109 (2013.01)]

11 Claims

1. A strontium tetraborate (SrB₄O₇) or lead tetraborate (PbB₄O₇) crystal comprising a plurality of uniform domains with respective periodically alternating polarity of the crystal axis, the uniform domains defining a volume periodic structure of the SrB₄O₇or PbB₄O₇crystal enabling quasi phase-matching (QPM) use.