caa a22 4500 469040920 CHVBK 20180323132811.0 cr unu---uuuuu 170328e19921201xx s 000 0 eng 10.1007/BF02847285 doi (NATIONALLICENCE)springer-10.1007/BF02847285 A technique for frequency stabilization of an internal mirror He-Ne laser [Elektronische Daten] [H Dahiya, V Chitnis, Kowsalya,, V Dandawate] A technique for frequency stabilization of an internal mirror He-Ne laser using phase sensitive detection without cavity length modulation is suggested. The orthogonally plane polarized modes are separated and then convered into two photoelectric signals using two photodetectors. The photoelectric signals are switched alternately so as to generate a square wave, whose amplitude is proportional to the intensity difference between the two orthogonal polarizations. A lock-in amplifier is used to detect this square wave, with the switching frequency as reference. The phase detected signal is used for thermal stabilization of the laser. The frequency stability of 5 × 10−9 was obtained with an integration time of 1 s. the Indian Academy of Sciences, 1992 Laser nationallicence frequency stabilization nationallicence electronic switching nationallicence phase sensitive detection nationallicence 6.60 nationallicence 7.60 nationallicence Dahiya H. Length Standard Section, Standards Division, National Physical Laboratory, Dr. K S Krishnan Road, 110 012, New Delhi, India aut Chitnis V. Length Standard Section, Standards Division, National Physical Laboratory, Dr. K S Krishnan Road, 110 012, New Delhi, India aut Kowsalya, Length Standard Section, Standards Division, National Physical Laboratory, Dr. K S Krishnan Road, 110 012, New Delhi, India aut Dandawate V. Length Standard Section, Standards Division, National Physical Laboratory, Dr. K S Krishnan Road, 110 012, New Delhi, India aut Pramana Springer India 39/6(1992-12-01), 667-671 0304-4289 39:6<667 1992 39 12043 https://doi.org/10.1007/BF02847285 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02847285 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Dahiya H. Length Standard Section, Standards Division, National Physical Laboratory, Dr. K S Krishnan Road, 110 012, New Delhi, India aut NATIONALLICENCE 700 1- Chitnis V. Length Standard Section, Standards Division, National Physical Laboratory, Dr. K S Krishnan Road, 110 012, New Delhi, India aut NATIONALLICENCE 700 1- Kowsalya Length Standard Section, Standards Division, National Physical Laboratory, Dr. K S Krishnan Road, 110 012, New Delhi, India aut NATIONALLICENCE 700 1- Dandawate V. Length Standard Section, Standards Division, National Physical Laboratory, Dr. K S Krishnan Road, 110 012, New Delhi, India aut NATIONALLICENCE 773 0- Pramana Springer India 39/6(1992-12-01), 667-671 0304-4289 39:6<667 1992 39 12043 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer