EP 0619032 A4 19940802 - OPTICAL INTERFEROMETER WITH SQUEEZED VACUUM AND REDUCED GUIDED-ACOUSTIC-WAVE BRILLOUIN SCATTERING NOISE.
Title (en)
OPTICAL INTERFEROMETER WITH SQUEEZED VACUUM AND REDUCED GUIDED-ACOUSTIC-WAVE BRILLOUIN SCATTERING NOISE.
Title (de)
OPTISCHES INTERFEROMETER MIT GEQUETSCHTEM VAKUUMZUSTAND UND VERRINGERUNG DES RAUSCHENS, DAS DURCH BRILLOUIN-STREUUNG GELEITETER AKUSTISCHER WELLEN VERURSACHT IST.
Title (fr)
INTERFEROMETRE OPTIQUE A VIDE COMPRIME ET A BRUIT DIMINUE DE DISPERSION DE BRILLOUIN D'ONDE ACOUSTIQUE GUIDEE.
Publication
Application
Priority
- GB 9218235 A 19920827
- US 9301421 W 19930217
Abstract (en)
[origin: WO9405967A1] An interferometric measurement scheme utilizing squeezed light wherein an input pulse is split (14) into two consecutive input pulses (15a, 15b) separated by a time interval that is less than the inverse spectral width of GAWBS. The two pulses are further split (16) into first (20a, 20b) and second (22a, 22b) pairs of pulses and are caused to propagate in opposite directions through a fiber optic interferometer loop (18) and are recombined upon exiting the loop (16). The recombined pulses are caused to pass through a (pi) phase modulator (38) which modulates one of the two pulses. The output is then introduced to a balanced detector (50) where the detected signal of the two is averaged such that GAWBS noise is cancelled.
IPC 1-7
IPC 8 full level
G01B 9/02 (2006.01); G01J 9/02 (2006.01); G02F 1/35 (2006.01); G02F 1/21 (2006.01)
CPC (source: EP)
G01J 9/02 (2013.01); G02F 1/3519 (2013.01); G01J 2009/0226 (2013.01); G02F 1/211 (2021.01)
Citation (search report)
- [PX] M. SHIRASAKI & H.A. HAUS: "Reduction of guided-acoustic-wave Brillouin scattering noise in a squeezer", OPTICS LETTERS, vol. 17, 1 September 1992 (1992-09-01), WASHINGTON US, pages 1225 - 1227, XP000293926
- See references of WO 9405967A1
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9405967 A1 19940317; EP 0619032 A1 19941012; EP 0619032 A4 19940802; GB 9218235 D0 19921014; JP H07503800 A 19950420
DOCDB simple family (application)
US 9301421 W 19930217; EP 93906030 A 19930217; GB 9218235 A 19920827; JP 50715894 A 19930217