Son, JY Strilets, IA Chun, JH Shin, S Choi, YJ Lee, HS 2024-01-21T15:12:10Z 2024-01-21T15:12:10Z 2021-09-05 1999-07-22 0013-5194 https://pubs.kist.re.kr/handle/201004/142048 The intensity difference between counterpropagating waves in ring lasers with back-reflection waves from external mirrors is analysed to enable a highly accurate measurement of displacement to be obtained. The difference is expressed as a periodic function of the distances between the ring laser mirrors and their corresponding mirrors. The measurement accuracy attainable with the difference can be in the sub-nanometre range. English IEE-INST ELEC ENG Possibility of measuring displacement with sub-nanometre accuracy by ring laser operating in lock-in regime Article 10.1049/el:19990878 1 ELECTRONICS LETTERS, v.35, no.15, pp.1258 - 1260 ELECTRONICS LETTERS 35 15 1258 1260 scie scopus 000081960100035 2-s2.0-0032638968 Engineering, Electrical & Electronic Engineering Article ring laser