Optical device

Patent metadata

Field	Value
Publication number	US-11119342-B2
Application number	US-202016791774-A
Country	US
Kind code	B2
Filing date	Feb 14, 2020
Priority date	Feb 14, 2020
Publication date	Sep 14, 2021
Grant date	Sep 14, 2021

Abstract

An aspect of the disclosure provides an optical device including a microring resonator (MRR).

First claim

We claim:

1. A short-haul optical transmitter comprising:
a distribution matcher (DM), for receiving data for transmission, from a data source at a data rate, and for generating a ring input data stream;
a micro-ring resonator (MRR) for receiving the ring input data stream, for modulating the ring input data onto a laser signal and for transmitting the modulated laser signal towards a destination; and
an MRR controller operating at a rate independent of the data rate for controlling an operational parameter of the MRR in accordance with at least one of data associated with the laser signal input to the MRR and data associated with the modulated laser signal transmitted by the MRR;
wherein the MRR comprises an input for receiving from an external source the laser signal and wherein the transmitter comprises a detector operatively connected to the input of the MRR for obtaining data associated with the laser signal received by the MRR and for providing the obtained data to the MRR controller.

2. The short-haul optical transmitter of claim 1 wherein the ring input data stream has a data rate different than the data rate of the data source.

3. The short-haul optical transmitter of claim 1 further comprising a detector operatively connected to an output of the MRR for obtaining data associated with the modulated laser signal transmitted by the MRR, and for providing the obtained data to the MRR controller.

4. The short-haul optical transmitter of claim 3 wherein the detector operates at rate independent of the data rate of the data source.

5. The short-haul optical transmitter of claim 1 wherein the data rate of the data source is at least ten of gigabits per second, and the MRR controller operates at a rate of at least one kilohertz.

6. The short-haul optical transmitter of claim 1 wherein the laser signal has a wavelength of λ 1 and the MRR has a resonant wavelength set in accordance with λ 1 .

7. The short-haul optical transmitter of claim 6 wherein the MRR controller controls the operational parameter of the MRR to maintain a resonant wavelength set in accordance with λ 1 .

8. The short-haul optical transmitter of claim 1 wherein the DM is configured with an encoding scheme to manipulate the distribution of the bit patterns of the data stream to minimize self-heating effects.

9. The short-haul optical transmitter of claim 1 wherein the DM is configured with an encoding scheme of length M to minimize self-heating effects over a block length of N bits of information dependent on the physical time constant of the MRR.

10. The short-haul optical transmitter of claim 9 wherein the DM is configured with an encoding scheme of M less than N to reduce the self-heating power dissipated inside the ring normalized to N bits of information dependent on the characteristics of the MRR and the modulation scheme employed.

11. The short-haul optical transmitter of claim 1 wherein the operational parameter is temperature.

12. The short-haul optical transmitter of claim 1 wherein the operational parameter is dc bias.

13. A method of optical short-haul data transmission comprising:
receiving, at a distribution matcher (DM), data from a data source at a data rate;
generating, by the DM, a data stream for input to a micro-ring resonator (MRR);
receiving, by the MRR, a laser signal at an input from an external source;
obtaining, by a detector operatively connected to the input of the MRR, data associated with the laser signal received by the MRR;
providing, by the detector, the obtained data to an MRR controller;
receiving, by the MRR, the data stream and modulating, by the MRR, the data stream onto the laser signal;
transmitting, by the MRR, the modulated laser signal towards a destination; and
controlling, by the MRR controller, an operational parameter of the MRR in accordance with at least one of data associated with the laser signal input to the MRR and data associated with the modulated laser signal transmitted by the MRR;
wherein the MRR controller operates at a rate independent of the data rate.

14. The method of claim 13 wherein the ring input data stream has a data rate different than the data rate of the data source.

15. The method of claim 13 wherein the DM is configured with an encoding scheme to manipulate the distribution of the bit patterns of the data stream to minimize self-heating effects.

16. The method of claim 13 wherein the DM is configured with an encoding scheme of length M to minimize self-heating power dissipated over a block length of N bits of information dependent on the physical time constant of the MRR.

17. The method of claim 16 wherein the DM is configured with an encoding scheme of M less than N to reduce the self-heating power dissipated inside the ring normalized to N bits of information dependent on the characteristics of the MRR and the modulation scheme employed.

18. The method of claim 13 wherein the operational parameter is temperature.

19. The method of claim 13 wherein the operational parameter is dc bias.

20. The method of claim 13 further comprising receiving, by an output detector operatively connected to an output of the MRR data associated with the modulated laser signal transmitted by the MRR, and providing the obtained data to the MRR controller, wherein the output detector operates at rate independent of the data rate of the data source.

Assignees

• Mansouri Rad Mohammad Mehdi
• Ebrahimzad Hamid
• Huawei Tech Co Ltd

Inventors

• Mansouri Rad Mohammad Mehdi
• Ebrahimzad Hamid

Classifications

• H04B10/5053 Primary

  using a parallel, i.e. shunt, combination of modulators · CPC title

• G02F1/011 Primary

  in optical waveguides, not otherwise provided for in this subclass · CPC title

• G02F2203/15

  involving resonance effects, e.g. resonantly enhanced interaction · CPC title

• H04B10/572

  Wavelength control · CPC title

• G02B2006/12061

  Silicon · CPC title