公开(公告)号：WO2021255347A1

公开(公告)日：2021-12-23

申请号：PCT/FI2021/050468

申请日：2021-06-18

Applicant: TEKNOLOGIAN TUTKIMUSKESKUS VTT OY

Inventor： LEHTIMÄKI, Lauri ,  HARJANNE, Mikko ,  CHERCHI, Matteo

IPC: G02B6/122 ,  G02B6/126 ,  G02B6/28 ,  G02B6/1228 ,  G02B6/2813

Abstract: A polarizing device (500) comprises: - a first waveguide (WG1) to guide input light (LBO), - a second waveguide (WG2) to guide TE-polarized light (LB2), wherein the second waveguide (WG2) comprises a tapered input portion (TAP1) to polarization-selectively couple TE-polarized light from the first waveguide (WG1) to the second waveguide (WG2), wherein the tapered input portion (TAPI) symmetrically overlaps the first waveguide (WG1), and the thickness (ti2) of the tapered input portion (TAP1) has been selected to substantially prevent coupling of TM-polarized light from the first waveguide (WG1) to the second waveguide (WG2), wherein the refractive index (n2) of the second waveguide (WG2) is higher than the refractive index (ni) of the first waveguide (WG1), - a multimode interferometer (MMI) having a multimode portion (CR12).

公开(公告)号：WO2022269361A1

公开(公告)日：2022-12-29

申请号：PCT/IB2022/000373

申请日：2022-06-24

Applicant: ROCKLEY PHOTONICS LIMITED

Inventor： LEE, Brian, S. ,  SCOFIELD, Adam ,  DRISCOLL, Jeffrey ,  GROTE, Richard ,  GONDARENKO, Alexander ,  LEE, Yi Ho ,  TRITA, Andrea

IPC: G02B6/12 ,  G02B6/125 ,  G02B6/28 ,  G02B27/48 ,  G02B6/12004 ,  G02B6/12007 ,  G02B6/2813

Abstract: A transmitter photonic integrated circuit (PIC) for generating an optical signal for optical spectroscopy of a surface, the transmitter PIC comprising: One or more coherent light source(s); a homogenizer, the homogenizer comprising a planar waveguide device and/or an optical phased array (OP A) which receives light from the coherent light source(s) and generates interference to produce multiple statistically uncorrelated speckle patterns that are combined to provide the optical output.

公开(公告)号：WO2022013752A1

公开(公告)日：2022-01-20

申请号：PCT/IB2021/056310

申请日：2021-07-13

Applicant: DENSELIGHT SEMICONDUCTORS PTE LTD

Inventor： PIPER, Andy ,  LOH, Ter Hoe ,  SIM, Hon Yuen Aaron ,  KOH, Long Cheng ,  CHAN, Yuen Chuen ,  LAM, Yee Loy

IPC: G02B6/12 ,  G02B6/122 ,  G02B2006/12061 ,  G02B2006/12147 ,  G02B2006/1215 ,  G02B6/0288 ,  G02B6/12004 ,  G02B6/1228 ,  G02B6/2813 ,  H01S2301/176 ,  H01S3/0675 ,  H01S3/06754 ,  H01S5/0071 ,  H01S5/0078 ,  H01S5/021 ,  H01S5/0287 ,  H01S5/04256 ,  H01S5/04257 ,  H01S5/101 ,  H01S5/1014 ,  H01S5/1032 ,  H01S5/1085 ,  H01S5/12 ,  H01S5/50 ,  H01S5/5027

Abstract: A photonic integrated circuit (PIC) includes various mode field adapters (MFAs), a waveguide, and various contact pads. All the MFAs are on a same facet of the PIC. One MFA of the PIC outputs a first optical signal that is an amplified version of a second optical signal. The waveguide is divided into two waveguide arms and a bend portion to join the two waveguide arms. The waveguide extends between the MFAs such that the second optical signal propagates through the waveguide. Further, each waveguide arm is formed between the contact pads. The second optical signal propagating through the waveguide is amplified based on a current that is injected in the PIC by way of the contact pads.