公开(公告)号：NO852237A

公开(公告)日：1985-12-12

申请号：NO852237

申请日：1985-06-03

Applicant: LITTON SYSTEMS INC

Inventor： PAVLATH GEORGE A

IPC: G01D5/26 ,  G01D5/353 ,  G01D21/00 ,  G01H9/00 ,  G01J1/02 ,  G01N21/00 ,  G01R9/00 ,  G01R33/032 ,  G02B6/00 ,  G02B6/28 ,  G02B

CPC classification number: G01D5/35383 ,  G01H9/004 ,  G02B6/2821 ,  G02B6/2861

公开(公告)号：BR8501163A

公开(公告)日：1985-11-12

申请号：BR8501163

申请日：1985-03-15

Applicant: LITTON SYSTEMS INC

Inventor： PAVLATH GEORGE A

IPC: G02B5/30 ,  G02B6/024 ,  G02B6/28 ,  G02B6/34

Abstract: This invention relates to fiber optic apparatus and methods for polarizing light for use in fiber optic devices, such as rotation sensors. A phase grating (52) formed of alternating layers of dielectrics (54,56) having different indices of refraction is placed adjacent a half coupler (12) that includes a fiber (20,22) having a cladding thickness which forms an interaction region. The evanescent field of light of a selected polarization interacts with the phase grating (52) to couple out of the fiber (20,22) while light of a second selected polarization remains in the fiber (20,22).

公开(公告)号：AU3988885A

公开(公告)日：1985-09-19

申请号：AU3988885

申请日：1985-03-15

Applicant: LITTON SYSTEMS INC

Inventor： PAVLATH GEORGE A

IPC: G02B5/30 ,  G02B6/024 ,  G02B6/28 ,  G02B6/34 ,  G02B6/26

Abstract: This invention relates to fiber optic apparatus and methods for polarizing light for use in fiber optic devices, such as rotation sensors. A phase grating (52) formed of alternating layers of dielectrics (54,56) having different indices of refraction is placed adjacent a half coupler (12) that includes a fiber (20,22) having a cladding thickness which forms an interaction region. The evanescent field of light of a selected polarization interacts with the phase grating (52) to couple out of the fiber (20,22) while light of a second selected polarization remains in the fiber (20,22).

公开(公告)号：NO851016A

公开(公告)日：1985-09-17

申请号：NO851016

申请日：1985-03-14

Applicant: LITTON SYSTEMS INC

Inventor： PAVLATH GEORGE A

IPC: G02B20060101 ,  G02B

公开(公告)号：AU3208984A

公开(公告)日：1985-06-13

申请号：AU3208984

申请日：1984-08-20

Applicant: LITTON SYSTEMS INC

Inventor： PAVLATH GEORGE A

IPC: G02B5/30 ,  G02B6/00 ,  G02B6/024 ,  G02B6/10 ,  G02B6/14 ,  G02B6/26 ,  G02B6/28 ,  G02B6/34 ,  G02B27/28 ,  G02F1/01

Abstract: This invention provides apparatus and methods for converting a lightwave of an arbitrary polarization propagating in a single mode optical fiber into a wave having a single linear polarization state. A polarization couples light of an undesired polarization out of the fiber, and a photodetector produces an error signal responsive to light coupled from the fiber. Control circuitry processes the error signal to produce control signals which are input to a polarization of light input to the polarizer to null the error signal. With the error signal maintained at a minimum value the light input to the polarizer and, hence, the light output therefrom is a wave having only the desired linear polarization.