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公开(公告)号：DE69415577T2
公开(公告)日：1999-07-15
申请号：DE69415577
申请日：1994-03-17
Applicant: IBM
Inventor： BROCK PHILLIP JOE , FRANKLIN JACQLYNN ANN , SCHELLENBERG FRANKLIN MARK , TSAY JIUNN
Abstract: A plurality of noncontiguous polygonal regions of phase-shifting material have edges spaced apart less than the distance at which images of said edges would separate. The edges of the regions of phase-shifting material have differing arbitrarily selectable angular orientations (nonparallel as well as parallel) on a nonphase-shifting material. The noncontiguous phase-shifting regions may be arranged in a matrix of parallel columns and rows to facilitate fabrication and facilitate writing of the phase-shifting regions in any arbitrary pattern on an image plane. At least one of the phase-shifting regions constitutes a connective phase-shifting region with edges spaced from edges of adjacent ones of the phase-shifting regions to create a pattern with a continuous body of photoresist covering areas corresponding to the phase-shifting regions upon exposure of the mask. The phase-shifting regions may have different transmission coefficients to provide differing degrees of transparency or different degrees of phase shift to provide differing degrees of image intensity.
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公开(公告)号：DE69022685T2
公开(公告)日：1996-05-02
申请号：DE69022685
申请日：1990-11-07
Applicant: IBM
Inventor： ASTHANA RAHUL , MILLER ROBERT DENNIS , SCHELLENBERG FRANKLIN MARK , SINCERBOX GLENN TAVERNIA , ZAVISLAN JAMES MATTHEW
Abstract: An improved apparatus and method for detecting the polarization state of an optical wavefront is disclosed, which is especially suitable for use in an integrated magneto-optic recording head. An optically transparent waveguide structure (10) transmits TE and TM modes of the wavefront propagated as a beam coupled into the waveguide by a TE/TM grating coupler (16). In the waveguide structure is a periodic structure (21) comprising a birefringent mode separator that splits the propagating beam into TE and TM modes. The mode separator comprises an array of uniformly spaced volumes of identical configuration. Photosensitive devices (13,14) detect the intensity of the light contained within each of the separated beams. The signals from these photosensitive devices are used to determine the state of polarization of the optical wavefront. The periodic structure may, if desired, comprise regions of alternating birefringence, such as a Bragg grating, either in a waveguide layer or a cladding layer. Focal power is introduced (1) by providing focal power in the input grating coupler to the waveguide with a curved grating structure, (2) by varying the pitch of the birefringent mode separator extending in a direction transverse to the optical axis of the propagating beam, or (3) by introducing a surface grating with a varying pitch in a direction transverse of the optical axis.
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公开(公告)号：DE69025564D1
公开(公告)日：1996-04-04
申请号：DE69025564
申请日：1990-12-07
Applicant: IBM
Inventor： FUKUZAWA TADASHI , KANO SATORU S , KUMATA KIYOSHI , LEE VICTOR Y , SCHELLENBERG FRANKLIN MARK , TAKAHASHI YUTAKA
Abstract: The invention relates to a nonlinear optical device comprising a film structure (2) coated on a substrate (1) without interposition of adhesive. According to the invention the device is characterised in that the film structure comprises a modulated intercalation structure consisting of a layer of semi-conductor material and a layer of organic material, the layers having different energy gaps and the modulated structure being a super lattice structure. The invention also relates to a method of manufacturing a nonlinear optical device comprising dissolving an organic material in a solvent, and spin coating the solution onto a substrate and thereby forming an organic material film with one of its crystal axes oriented in the direction normal to the substrate, the film having a modulated structure of the two types of layers alternately intercalated and differing in energy gap in the direction.
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Patent Agency Ranking
公开(公告)号：DE69025564T2
公开(公告)日：1996-09-19
申请号：DE69025564
申请日：1990-12-07
Applicant: IBM
Inventor： FUKUZAWA TADASHI , KANO SATORU S , KUMATA KIYOSHI , LEE VICTOR Y , SCHELLENBERG FRANKLIN MARK , TAKAHASHI YUTAKA
Abstract: The invention relates to a nonlinear optical device comprising a film structure (2) coated on a substrate (1) without interposition of adhesive. According to the invention the device is characterised in that the film structure comprises a modulated intercalation structure consisting of a layer of semi-conductor material and a layer of organic material, the layers having different energy gaps and the modulated structure being a super lattice structure. The invention also relates to a method of manufacturing a nonlinear optical device comprising dissolving an organic material in a solvent, and spin coating the solution onto a substrate and thereby forming an organic material film with one of its crystal axes oriented in the direction normal to the substrate, the film having a modulated structure of the two types of layers alternately intercalated and differing in energy gap in the direction.
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公开(公告)号：DE69022685D1
公开(公告)日：1995-11-02
申请号：DE69022685
申请日：1990-11-07
Applicant: IBM
Inventor： ASTHANA RAHUL , MILLER ROBERT DENNIS , SCHELLENBERG FRANKLIN MARK , SINCERBOX GLENN TAVERNIA , ZAVISLAN JAMES MATTHEW
Abstract: An improved apparatus and method for detecting the polarization state of an optical wavefront is disclosed, which is especially suitable for use in an integrated magneto-optic recording head. An optically transparent waveguide structure (10) transmits TE and TM modes of the wavefront propagated as a beam coupled into the waveguide by a TE/TM grating coupler (16). In the waveguide structure is a periodic structure (21) comprising a birefringent mode separator that splits the propagating beam into TE and TM modes. The mode separator comprises an array of uniformly spaced volumes of identical configuration. Photosensitive devices (13,14) detect the intensity of the light contained within each of the separated beams. The signals from these photosensitive devices are used to determine the state of polarization of the optical wavefront. The periodic structure may, if desired, comprise regions of alternating birefringence, such as a Bragg grating, either in a waveguide layer or a cladding layer. Focal power is introduced (1) by providing focal power in the input grating coupler to the waveguide with a curved grating structure, (2) by varying the pitch of the birefringent mode separator extending in a direction transverse to the optical axis of the propagating beam, or (3) by introducing a surface grating with a varying pitch in a direction transverse of the optical axis.
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公开(公告)号：DE69415577D1
公开(公告)日：1999-02-11
申请号：DE69415577
申请日：1994-03-17
Applicant: IBM
Inventor： BROCK PHILLIP JOE , FRANKLIN JACQLYNN ANN , SCHELLENBERG FRANKLIN MARK , TSAY JIUNN
Abstract: A plurality of noncontiguous polygonal regions of phase-shifting material have edges spaced apart less than the distance at which images of said edges would separate. The edges of the regions of phase-shifting material have differing arbitrarily selectable angular orientations (nonparallel as well as parallel) on a nonphase-shifting material. The noncontiguous phase-shifting regions may be arranged in a matrix of parallel columns and rows to facilitate fabrication and facilitate writing of the phase-shifting regions in any arbitrary pattern on an image plane. At least one of the phase-shifting regions constitutes a connective phase-shifting region with edges spaced from edges of adjacent ones of the phase-shifting regions to create a pattern with a continuous body of photoresist covering areas corresponding to the phase-shifting regions upon exposure of the mask. The phase-shifting regions may have different transmission coefficients to provide differing degrees of transparency or different degrees of phase shift to provide differing degrees of image intensity.
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