公开(公告)号：US20210286190A1

公开(公告)日：2021-09-16

申请号：US17301968

申请日：2021-04-20

Applicant: Cisco Technology, Inc.

Inventor： Tao LING ,  Yi Ho LEE ,  Ravi S. TUMMIDI ,  Mark A. WEBSTER

IPC: G02B27/42 ,  H04J14/02 ,  G02B27/10 ,  G02B5/18 ,  H04B10/40

Abstract: Aspects described herein include an optical apparatus comprising an input port configured to receive an optical signal comprising a plurality of wavelengths, and a plurality of output ports. Each output port is configured to output a respective wavelength of the plurality of wavelengths. The optical apparatus further comprises a first plurality of two-mode Bragg gratings in a cascaded arrangement. Each grating of the first plurality of two-mode Bragg gratings is configured to reflect a respective wavelength of the plurality of wavelengths toward a respective output port of the plurality of output ports, and transmit any remaining wavelengths of the plurality of wavelengths.

公开(公告)号：US20230119450A1

公开(公告)日：2023-04-20

申请号：US17451247

申请日：2021-10-18

Applicant: Cisco Technology, Inc.

Inventor： Yi Ho LEE ,  Tao LING ,  Ravi S. TUMMIDI ,  Mark A. WEBSTER ,  Prakash B. GOTHOSKAR

IPC: G02B6/12 ,  H04L1/00

Abstract: Fabrication-tolerant on-chip multiplexers and demultiplexers are provides via a lattice filter interleaver configured to receive an input signal including a plurality of individual signals and to produce a first interleaved signal with a first subset of the plurality of individual signals and a second interleaved signal with a second subset of the plurality of individual signals; a first Bragg interleaver configured to receive the first interleaved signal and produce a first output signal including a first individual signal of the plurality of individual signals and a second output signal including a second individual signal of the plurality of individual signals; and a second Bragg interleaver configured to receive the second interleaved signal and produce a third output signal including a third individual signal of the plurality of individual signals and a fourth output signal including a fourth individual signal of the plurality of individual signals.

公开(公告)号：US20210345022A1

公开(公告)日：2021-11-04

申请号：US17305287

申请日：2021-07-02

Applicant: Cisco Technology, Inc.

Inventor： Tao LING ,  Ravi S. TUMMIDI ,  Yi Ho LEE ,  Mark A. WEBSTER

IPC: H04Q11/00 ,  H04J14/02

Abstract: Process margin relaxation is provided in relation to a compensated-for process via a first optical device, fabricated to satisfy an operational specification when a compensated-for process is within a first tolerance range; a second optical device, fabricated to satisfy the operational specification when the compensated-for process is within second tolerance range, different than the first tolerance range; a first optical switch connected to an input and configured to output an optical signal received from the input to one of the first optical device and the second optical device; and a second optical switch configured to combine outputs from the first optical device and the second optical device.

公开(公告)号：US20210157033A1

公开(公告)日：2021-05-27

申请号：US16696957

申请日：2019-11-26

Applicant: Cisco Technology, Inc.

Inventor： Xunyuan ZHANG ,  Shiyi CHEN ,  Tao LING ,  Prakash B. GOTHOSKAR

IPC: G02B1/113 ,  G02B6/136 ,  G01M11/00

Abstract: Embodiments herein describe a photonic platform where an AR coating is disposed between an optical grating and a semiconductor substrate. In one embodiment, the optical grating is disposed within an insulative layer. A first side of the insulative layer provides an optical interface where an external optical source can transmit an optical signal into, or a receive an optical signal from, the grating. A second, opposite side of the insulative layer contacts the AR coating. When the external optical source transmits light through the first side of the insulative layer, some of the light passes through the grating and reaches the AR coating. The AR coating prevents this light from being reflected back to the grating by the semiconductor layer which can cause interference that varies the coupling efficiency of the grating.

公开(公告)号：US20210109281A1

公开(公告)日：2021-04-15

申请号：US17107298

申请日：2020-11-30

Applicant: Cisco Technology, Inc.

Inventor： Tao LING ,  Yi Ho LEE ,  Ravi S. TUMMIDI ,  Mark A. WEBSTER

IPC: G02B6/02 ,  G02B6/293 ,  G02B6/12 ,  H04J14/02

Abstract: Aspects described herein include an optical apparatus comprising a multiple-stage arrangement of two-mode Bragg gratings comprising: at least a first Bragg grating of a first stage. The first Bragg grating is configured to transmit a first two wavelengths and to reflect a second two wavelengths of a received optical signal. The optical apparatus further comprises a second Bragg grating of a second stage. The second Bragg grating is configured to transmit one of the first two wavelengths and to reflect an other of the first two wavelengths. The optical apparatus further comprises a third Bragg grating of the second stage. The third Bragg grating is configured to transmit one of the second two wavelengths and to reflect an other of the second two wavelengths.