US 12,149,043 B2
Phase stabilization system and phase stabilization method using the same
Taek Jeong, Daejeon (KR); Dong Kyu Kim, Daejeon (KR); Duk Young Kim, Daejeon (KR); Sang Kyung Lee, Daejeon (KR); Zae Ill Kim, Daejeon (KR); and Yong Sup Ihn, Daejeon (KR)
Assigned to AGENCY FOR DEFENSE DEVELOPMENT, Daejeon (KR)
Filed by AGENCY FOR DEFENSE DEVELOPMENT, Daejeon (KR)
Filed on Mar. 15, 2022, as Appl. No. 17/695,153.
Claims priority of application No. 10-2021-0034161 (KR), filed on Mar. 16, 2021.
Prior Publication US 2022/0302668 A1, Sep. 22, 2022
Int. Cl. H01S 3/13 (2006.01); G01J 3/42 (2006.01)
CPC H01S 3/1307 (2013.01) [G01J 3/42 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A phase stabilization system comprising:
a laser configured to emit a beam with a frequency fixed;
a first beam splitter configured to split the beam received from the laser into a first beam and a second beam;
a first mirror configured to reflect the first beam;
a second mirror configured to reflect the second beam, wherein a piezo actuator is attached to one side of the second mirror;
a second beam splitter configured to receive the first beam reflected at the first mirror and the second beam reflected at the second mirror and split the received first and second beams into a third beam and a fourth beam;
a first photodetector configured to detect the third beam output from one side of the second beam splitter;
a third beam splitter configured to receive the fourth beam output from the other side of the second beam splitter and split the received fourth beam into a fifth beam and a sixth beam;
a modulator bias controller configured to receive the fifth beam output from one side of the third beam splitter;
a second photodetector configured to detect the sixth beam output from the other side of the third beam splitter; and
a piezo controller configured to receive a signal controlled by the modulator bias controller.