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    VARIABLE PHASE STOP FOR USE IN INTERFEROMETERS
    2.
    发明申请
    VARIABLE PHASE STOP FOR USE IN INTERFEROMETERS 审中-公开
    用于干扰计的可变相位停止

    公开(公告)号：WO1988006302A1

    公开(公告)日：1988-08-25

    申请号：PCT/US1987003295

    申请日：1987-12-14

    Applicant: HUGHES AIRCRAFT COMPANY

    Inventor： HUGHES AIRCRAFT COMPANY ,  PEPPER, David, M. ,  O'MEARA, Thomas

    IPC: G02F01/03

    CPC classification number: G01J9/02 ,  G02F1/1313 ,  G02F1/134309

    Abstract: An electro-optical device (10) is used to alter characteristics of a light beam passing through it. In a particularly preferred embodiment, the device (10) is used as a phase stop having a dynamically variable aperture whose size is defined by the selected application of an electrical potential across one or more concentric, transparent ring-like electrodes (13, 14, 16 and 18). The electro-optical device (10) finds particular utility in a common-path interferometer (40) where fringe visibility is optimized by using suitable servo-electronics (56) to select an appropriate aperture size for the phase stop (10).

    Abstract translation: 电光装置（10）用于改变通过它的光束的特性。 在特别优选的实施例中，装置（10）用作具有动态可变孔径的相位停止器，其尺寸由所选择的跨越一个或多个同心的透明环形电极（13,14， 16和18）。 电光装置（10）在公共路径干涉仪（40）中具有特别的用途，其中通过使用合适的伺服电子设备（56）来选择相位停止（10）的适当孔径尺寸来优化边缘可见度。

    SYSTEM AND METHOD FOR ENCODING INFORMATION ONTO AN OPTICAL BEAM
    3.
    发明申请
    SYSTEM AND METHOD FOR ENCODING INFORMATION ONTO AN OPTICAL BEAM 审中-公开
    用于将信息编码到光束上的系统和方法

    公开(公告)号：WO1987005715A1

    公开(公告)日：1987-09-24

    申请号：PCT/US1987000292

    申请日：1987-02-12

    Applicant: HUGHES AIRCRAFT COMPANY

    Inventor： HUGHES AIRCRAFT COMPANY ,  PEPPER, David, M.

    IPC: G02F01/35

    CPC classification number: G02F1/3538 ,  G02F1/0541

    Abstract: A system and method for encoding information onto an optical beam in which a photorefractive material (18) is used to modulate the beam. An alternating electric field is applied to the photorefractive material (18) and modulated so as to vary the material's index ellipsoid via the electro-optic effect and hence modulate an output beam (20A) in accordance with the information to be encoded. The invention has applications to both externally pumped and self-pumped phase conjugate mirrors, and to other optical systems. Various modulation techniques can be used, and the modulation can be isolated from noisy beams by applying the modulating electric field on a high frequency carrier.

    BANDWIDTH-PRESERVING BRILLOUIN PHASE CONJUGATE MIRROR AND METHOD
    4.
    发明申请
    BANDWIDTH-PRESERVING BRILLOUIN PHASE CONJUGATE MIRROR AND METHOD 审中-公开

    公开(公告)号：WO1990010889A1

    公开(公告)日：1990-09-20

    申请号：PCT/US1990000914

    申请日：1990-02-22

    Applicant: HUGHES AIRCRAFT COMPANY

    Inventor： HUGHES AIRCRAFT COMPANY ,  ROCKWELL, David, A. ,  LIND, Richard, C. ,  PEPPER, David, M.

    IPC: G02F01/35

    CPC classification number: G02F1/3538 ,  H01S3/305

    Abstract: A coherent input beam from a laser (82) is fed into a Brillouin-enhanced four wave mixer (88) which generates a phase conjugated seed beam in counterpropagation with the input beam. A Brillouin amplifier (86) is provided between the laser and four wave mixer to transfer energy from the input beam (Ep) to the seed beam (Ec) and thereby amplify the seed beam to produce a phase conjugated output beam with approximately 50 % of the energy of the input beam and narrow bandwidth which is free from random phase jumps associated with the acoustic noise generally required to initiate and sustain stimulated Brillouin scattering. The phase conjugated output beam can be modulated or steered in direction, as desired. Reference beams for the four wave mixer may be derived from the same laser source as the input beam and have energies one or more orders of magnitude smaller than the energy of the input beam.

    BANDWIDTH-PRESERVING BRILLOUIN PHASE CONJUGATE MIRROR AND METHOD
    5.
    发明授权
    BANDWIDTH-PRESERVING BRILLOUIN PHASE CONJUGATE MIRROR AND METHOD 失效
    与节约带宽和程序布里渊相位共轭镜。

    公开(公告)号：EP0416066B1

    公开(公告)日：1994-01-26

    申请号：EP90904503.1

    申请日：1990-02-22

    Applicant: Hughes Aircraft Company

    Inventor： ROCKWELL, David, A. ,  LIND, Richard, C. ,  PEPPER, David, M.

    IPC: G02F1/35

    CPC classification number: G02F1/3538 ,  H01S3/305

    Abstract: A coherent input beam from a laser (82) is fed into a Brillouin-enhanced four wave mixer (88) which generates a phase conjugated seed beam in counterpropagation with the input beam. A Brillouin amplifier (86) is provided between the laser and four wave mixer to transfer energy from the input beam (Ep) to the seed beam (Ec) and thereby amplify the seed beam to produce a phase conjugated output beam with approximately 50 % of the energy of the input beam and narrow bandwidth which is free from random phase jumps associated with the acoustic noise generally required to initiate and sustain stimulated Brillouin scattering. The phase conjugated output beam can be modulated or steered in direction, as desired. Reference beams for the four wave mixer may be derived from the same laser source as the input beam and have energies one or more orders of magnitude smaller than the energy of the input beam.

    VARIABLE PHASE STOP FOR USE IN INTERFEROMETERS
    6.
    发明授权
    VARIABLE PHASE STOP FOR USE IN INTERFEROMETERS 失效
    用于干扰计的可变相位停止

    公开(公告)号：EP0303630B1

    公开(公告)日：1993-08-04

    申请号：EP88900737.3

    申请日：1987-12-14

    Applicant: Hughes Aircraft Company

    Inventor： PEPPER, David, M. ,  O'MEARA, Thomas

    IPC: G02F1/03 ,  G02F1/13 ,  G01J9/02

    CPC classification number: G01J9/02 ,  G02F1/1313 ,  G02F1/134309

    Abstract: An electro-optical device (10) is used to alter characteristics of a light beam passing through it. In a particularly preferred embodiment, the device (10) is used as a phase stop having a dynamically variable aperture whose size is defined by the selected application of an electrical potential across one or more concentric, transparent ring-like electrodes (13, 14, 16 and 18). The electro-optical device (10) finds particular utility in a common-path interferometer (40) where fringe visibility is optimized by using suitable servo-electronics (56) to select an appropriate aperture size for the phase stop (10).

    SYSTEM AND METHOD FOR ENCODING INFORMATION ONTO AN OPTICAL BEAM
    7.
    发明授权
    SYSTEM AND METHOD FOR ENCODING INFORMATION ONTO AN OPTICAL BEAM 失效
    用于将信息编码到光束上的系统和方法

    公开(公告)号：EP0262177B1

    公开(公告)日：1992-09-30

    申请号：EP87901866.1

    申请日：1987-02-12

    Applicant: Hughes Aircraft Company

    Inventor： PEPPER, David, M.

    IPC: G02F1/35 ,  H04B10/00 ,  G02F1/03

    CPC classification number: G02F1/3538 ,  G02F1/0541

    Abstract: A system and method for encoding information onto an optical beam in which a photorefractive material (18) is used to modulate the beam. An alternating electric field is applied to the photorefractive material (18) and modulated so as to vary the material's index ellipsoid via the electro-optic effect and hence modulate an output beam (20A) in accordance with the information to be encoded. The invention has applications to both externally pumped and self-pumped phase conjugate mirrors, and to other optical systems. Various modulation techniques can be used, and the modulation can be isolated from noisy beams by applying the modulating electric field on a high frequency carrier.

    VARIABLE PHASE STOP FOR USE IN INTERFEROMETERS
    8.
    发明公开
    VARIABLE PHASE STOP FOR USE IN INTERFEROMETERS 失效
    可变相位PANEL FOR USE IN干涉。

    公开(公告)号：EP0303630A1

    公开(公告)日：1989-02-22

    申请号：EP88900737.0

    申请日：1987-12-14

    Applicant: Hughes Aircraft Company

    Inventor： PEPPER, David, M. ,  O'MEARA, Thomas

    IPC: G02F1 ,  G01J9

    CPC classification number: G01J9/02 ,  G02F1/1313 ,  G02F1/134309

    Abstract: Un dispositif électro-optique (10) est utilisé pour modifier les caractéristiques d'un rayon de lumière y passant à travers. Dans un mode de réalisation préféré particulier, le dispositif (10) est utilisé comme arrêt en phase ayant une ouverture variable dynamique dont la taille est définie par l'application sélectionnée d'un potentiel électrique en travers d'une ou plusieurs électrodes (13, 14, 16 et 18) concentriques, transparentes en forme d'anneau. Le dispositif électro-optique (10) trouve une utilité particulière dans un interféromètre de trajectoire ordinaire (40) où la visibilité en bordure est optimisée en utilisant des dispositifs servo-électroniques idoines (56) pour sélectionner une taille d'ouverture appropriée pour l'arrêt en phase (10).

    SYSTEM AND METHOD FOR ENCODING INFORMATION ONTO AN OPTICAL BEAM
    9.
    发明公开
    SYSTEM AND METHOD FOR ENCODING INFORMATION ONTO AN OPTICAL BEAM 失效
    DEVICE AND METHOD FOR信息编码的光学JET。

    公开(公告)号：EP0262177A1

    公开(公告)日：1988-04-06

    申请号：EP87901866.0

    申请日：1987-02-12

    Applicant: HUGHES AIRCRAFT COMPANY

    Inventor： PEPPER, David, M.

    IPC: G02B5 ,  G02F1 ,  G03H1 ,  H04B10

    CPC classification number: G02F1/3538 ,  G02F1/0541

    Abstract: Un système et un procédé, servant à coder des informations sur un faisceau optique, utilise un matériau photoréfractif (18), afin de moduler le faisceau. Un champ électrique alternatif est appliqué au matériau photoréfractif (18) et modulé de façon à faire varier l'ellipsoïde de référence du matériau par l'intermédiaire de l'effet électro-optique et, partant, de moduler un faisceau de sortie (20A) selon les informations à coder. La présente invention s'applique à la fois à des miroirs à conjugaison de phase à pompage externe et à autopompage et à d'autres systèmes optiques. Différentes techniques de modulation peuvent être utilisées et la modulation peut être isolée des faisceaux bruyants par application du champ électrique de modulation sur un porteur à haute fréquence.

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