US 11,855,405 B2
Device and method for adjusting laser pulse width using laser-induced plasma shutter
Hyung Rok Do, Seoul (KR); Sang Eun Bae, Seoul (KR); and Sung Kyun Oh, Seoul (KR)
Assigned to Seoul National University R&DBFoundation, Seoul (KR)
Filed by Seoul National University R&DB Foundation, Seoul (KR)
Filed on Oct. 25, 2019, as Appl. No. 16/663,359.
Claims priority of application No. 10-2019-0012133 (KR), filed on Jan. 30, 2019.
Prior Publication US 2020/0244028 A1, Jul. 30, 2020
Int. Cl. H01S 3/00 (2006.01); G02B 27/09 (2006.01); G02B 27/10 (2006.01); G02F 1/35 (2006.01); H01S 3/10 (2006.01); H05H 1/46 (2006.01)
CPC H01S 3/0057 (2013.01) [G02B 27/0905 (2013.01); G02B 27/10 (2013.01); G02F 1/3503 (2021.01); G02F 1/3505 (2021.01); G02F 1/3507 (2021.01); G02F 1/3511 (2013.01); G02F 1/3515 (2013.01); G02F 1/3523 (2013.01); H01S 3/0085 (2013.01); H05H 1/46 (2013.01); H01S 3/10092 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device for adjusting a laser pulse width, comprising:
a beam splitter for dividing the laser generated from a laser light source into a target pulse and a shutter pulse;
an optical path conversion unit capable of converting the optical path of the target pulse or the shutter pulse so that the path of the target pulse and the path of the shutter pulse intersect each other;
a plasma forming unit having adjustable internal pressure, and disposed at a point where the target pulse and the shutter pulse meet each other and capable of forming the plasma induced from the shutter pulse to adjust the pulse width of the target pulse; and
a focusing unit disposed on the path of the shutter pulse, and for focusing the shutter pulse so that the plasma induced from the shutter pulse is formed within the plasma forming unit.