公开(公告)号：US20200271837A1

公开(公告)日：2020-08-27

申请号：US16802339

申请日：2020-02-26

Applicant: Finisar Corporation

Inventor： Christoph M. Greiner ,  Jianji Yang ,  Dmitri Iazikov

IPC: G02B5/18

Abstract: An optical element includes a substrate, an intermediate layer, a topmost layer, and a contiguous multitude of recessed and non-recessed areal regions. The intermediate layer is formed over a top surface of the substrate and has a refractive index nI. The topmost layer is formed directly on the intermediate layer and has a refractive index nT where nT≠nI. The intermediate and topmost layers are substantially transparent over an operational wavelength range that includes a design wavelength λ0. A subset of areal regions has a largest transverse dimension less than about λ0. Each non-recessed areal region includes corresponding portions of the intermediate and topmost layers. Each recessed areal region extends entirely through the topmost layer and at least partly through the intermediate layer. A fill medium fills the recessed areal regions. The areal regions are variously sized and distributed transversely across the optical element.

公开(公告)号：US11294107B2

公开(公告)日：2022-04-05

申请号：US16558033

申请日：2019-08-30

Applicant: Finisar Corporation

Inventor： Christoph M. Greiner ,  Jianji Yang ,  Dmitri Iazikov ,  Justin M. Hannigan

IPC: G02B5/02 ,  G02F1/1335 ,  F21K9/69 ,  H01L33/60 ,  F21K9/68 ,  F21Y115/10

Abstract: Incident optical signals propagate within a diffuser substrate and impinge upon an optical diffuser within the diffuser substrate or on its output surface. The optical diffuser redirects or transforms respective portions of each incident signal into corresponding forward- and backward-directed optical signals. The backward-directed signals are redirected or transformed into additional incident signals, and so on. The forward-directed optical signals collectively form the optical output of an illumination source that exhibits reduced speckle. The illumination source can include multiple laser sources formed on or attached to an input surface of the diffuser substrate.

公开(公告)号：US20210026047A1

公开(公告)日：2021-01-28

申请号：US16558033

申请日：2019-08-30

Applicant: Finisar Corporation

Inventor： Christoph M. Greiner ,  Jianji Yang ,  Dmitri Iazikov ,  Justin M. Hannigan

IPC: G02B5/02 ,  G02F1/1335 ,  F21K9/69 ,  F21K9/68 ,  H01L33/60

Abstract: Incident optical signals propagate within a diffuser substrate and impinge upon an optical diffuser within the diffuser substrate or on its output surface. The optical diffuser redirects or transforms respective portions of each incident signal into corresponding forward- and backward-directed optical signals. The backward-directed signals are redirected or transformed into additional incident signals, and so on. The forward-directed optical signals collectively form the optical output of an illumination source that exhibits reduced speckle. The illumination source can include multiple laser sources formed on or attached to an input surface of the diffuser substrate.

公开(公告)号：US11487053B2

公开(公告)日：2022-11-01

申请号：US16802339

申请日：2020-02-26

Applicant: Finisar Corporation

Inventor： Christoph M. Greiner ,  Jianji Yang ,  Dmitri Iazikov

IPC: G02B5/18

Abstract: An optical element includes a substrate, an intermediate layer, a topmost layer, and a contiguous multitude of recessed and non-recessed areal regions. The intermediate layer is formed over a top surface of the substrate and has a refractive index nI. The topmost layer is formed directly on the intermediate layer and has a refractive index nT where nT≠nI. The intermediate and topmost layers are substantially transparent over an operational wavelength range that includes a design wavelength λ0. A subset of areal regions has a largest transverse dimension less than about λ0. Each non-recessed areal region includes corresponding portions of the intermediate and topmost layers. Each recessed areal region extends entirely through the topmost layer and at least partly through the intermediate layer. A fill medium fills the recessed areal regions. The areal regions are variously sized and distributed transversely across the optical element.

公开(公告)号：US11378724B2

公开(公告)日：2022-07-05

申请号：US16525574

申请日：2019-07-30

Applicant: Finisar Corporation

Inventor： Thomas W. Mossberg ,  Jianji Yang ,  Dmitri Iazikov ,  Christoph M. Greiner

IPC: G02B5/18 ,  G02B27/48

Abstract: An incident optical beam illuminates a subset of contiguous array of diffraction gratings on a substrate and produces one or more diffracted output beams. The grating array can be arranged so that (i) multiple incident beams result in a contiguous composite solid angle of far-field illumination, (ii) multiple output beams arising from any one incident beam do not overlap in the far field, or (iii) both. The gratings of the array can be arranged to produce a desired far-field illumination intensity profile. The grating array can be arranged so as to suppress or eliminate laser speckle arising from the output beams.

公开(公告)号：US10823365B2

公开(公告)日：2020-11-03

申请号：US16719098

申请日：2019-12-18

Applicant: Finisar Corporation

Inventor： Timothy S. Gray ,  Christoph M. Greiner ,  Justin M. Hannigan ,  Dmitri Iazikov ,  Charles B. Roxlo ,  Jianji Yang

IPC: F21V3/00 ,  G02B5/02 ,  F21V5/00 ,  F21Y105/10 ,  F21Y115/30

Abstract: Input optical signals propagate toward first optical diffuser, resulting in first-forward-directed optical signals that propagate toward a second optical diffuser, in turn resulting in second forward-directed optical signals. The second forward-directed optical signals collectively form the optical output of an illumination source that appears to emanate from an enlarged extended source and exhibits reduced speckle. The illumination source can include multiple laser sources formed on or attached to the first optical diffuser.