公开(公告)号：US20230266466A1

公开(公告)日：2023-08-24

申请号：US17678908

申请日：2022-02-23

申请人： Scantinel Photonics GmbH

发明人： Sandeep UMMETHALA ,  Naser HOSSEINI ,  Vladimir DAVYDENKO

IPC分类号： G01S17/34 ,  G01S17/931 ,  G01S17/89 ,  G01S7/35 ,  G01S7/481 ,  G01S7/4911

CPC分类号： G01S17/34 ,  G01S17/931 ,  G01S17/89 ,  G01S7/354 ,  G01S7/4814 ,  G01S7/4911

摘要： A device for scanning Frequency-Modulated Continuous Wave LiDAR range measurement comprises a light source that produces light having a varying frequency, a splitter that splits the light into reference light and output light, and a distribution matrix (36) that distributes the output light among a plurality of free space couplers that outcouple the output light into free space. A plurality of optical waveguides guide input light that was reflected at an object. A detector detects a superposition of the input light with the reference light, and a calculation unit determines the range to the object from the superposition detected by the detector. The device further comprises a common optical waveguide that is optically connected to the plurality of optical waveguides and the detector so that input light that is guided in any of the optical waveguides propagates through the common optical waveguide towards the detector without passing the distribution matrix.

公开(公告)号：US20230127941A1

公开(公告)日：2023-04-27

申请号：US17511361

申请日：2021-10-26

申请人： Scantinel Photonics GmbH

发明人： Sandeep UMMETHALA

IPC分类号： G02B6/126 ,  G01S7/481 ,  G01S17/42

摘要： An integrated on-chip polarization rotator splitter (26) comprises a waveguide polarization rotator (54) having a first and a second layer (62) that form a rib waveguide (66) together and are both made of silicon nitride. The first layer (62) has a first, a second and a third section. The first layer (64) has a first width (w1) that increases in the first section (S1), is constant in the second section (S1) and decreases in the third section (S3). The second layer (64) has a second width (w2) that continuously increases. The polarization rotator splitter (26) further includes a waveguide polarization splitter (61) comprising a first strip waveguide (71) and a second strip waveguide (72) that are separated by a gap (74). The first and second strip waveguides (71, 72) are also made of silicon nitride. The first and second strip waveguide (71, 72) form an asymmetric evanescent direction coupler.