Multiplexing two separate optical links with the same wavelength using asymmetric combining and splitting

• US 10,135,561 B2
• Filed: 07/20/2017
• Issued: 11/20/2018
• Est. Priority Date: 12/11/2014
• Status: Active Grant

• Current Assignee: Corning Optical Communications LLC (Corning Incorporated)
• Original Assignee: Corning Optical Communications Wireless Ltd. (Corning Incorporated)
• Inventors: Rosenfelder, Pinhas Yehuda, Shapira, Carmi
• Primary Examiner(s): Liu, Li
• Application Number:
  US15/655,228
• Publication Number:
  US 20170324505A1
• Time in Patent Office: 488 Days
• Field of Search: None
• CPC Class Codes: H04B 10/2507 for the reduction or elimination of distortion or dispersion
• CPC Class Codes: H04B 10/2589 Bidirectional transmission
• CPC Class Codes: H04J 14/0204 Broadcast and select arrangements, e.g. with an optical splitter at the input before adding or dropping
• CPC Class Codes: H04J 14/0205 Select and combine arrangements, e.g. with an optical combiner at the output after adding or dropping
• CPC Class Codes: H04J 14/0256 at the optical channel layer
• CPC Class Codes: H04J 14/0279 WDM point-to-point architectures
• CPC Class Codes: H04J 14/0282 WDM tree architectures

Abstract

An optical communications system includes an optical transmitter and an optical receiver optically coupled to an optical combiner/splitter, the combiner/splitter coupled to optical media; and, another optical transmitter and another optical receiver optically coupled to another optical combiner/splitter, the another combiner/splitter remotely coupled to the optical media; wherein the optical transmitter and the another optical transmitter are configured to transmit optical signals at substantially the same wavelength.

Claims

1. A method for providing an optical network configured for bi-directional communication using optical signals, the method comprising:

selecting a first operator comprising a first optical transmitter and a second optical receiver optically coupled to a first asymmetric optical combiner/splitter, the first asymmetric optical combiner/splitter coupling the first operator to a first end of optical media;

selecting a second operator comprising a second optical transmitter and a second first optical receiver optically coupled to a second asymmetric optical combiner/splitter, the second asymmetric optical combiner/splitter remotely coupled to the optical media;

attenuating a first signal transmitted from the first optical transmitter based on a low transmittance ratio, T_R, corresponding to the first asymmetric optical combiner/splitter prior to providing the first signal to the optical media;

attenuating the first signal received from the optical media based on a high transmittance ratio, T_R, corresponding to the second asymmetric optical combiner/splitter prior to providing the first signal to the first optical receiver;

attenuating a second signal transmitted from the second optical transmitter based on a low transmittance ratio, T_R, corresponding to the second asymmetric optical combiner/splitter prior to providing the second signal to the optical media; and

attenuating the second signal received from the optical media based on a high transmittance ratio, T_R, corresponding to the first asymmetric optical combiner/splitter prior to providing the second signal to the second optical receiver; and

selecting the second optical transmitter for operation at substantially a same wavelength as the first optical transmitter.

2. The method of claim 1, further comprising associating the low transmittance ratio, T_R, of each of the first and second asymmetric combiner/splitters with a respective one of the first and second optical transmitters.

3. The method of claim 2, further comprising associating the high transmittance ratio, T_R, of each of the first and second asymmetric combiner/splitters with a respective one of the first and second optical receivers.

4. The method of claim 3, wherein the high transmittance ratio, T_R, and the low transmittance ratio T_R comprise a combination of ratios that is one of 95/5, 90/10, 85/15, 80/20, 75/25, 70/30, and a ratio therebetween.

5. The method of claim 3, wherein the first optical transmitter is substantially insensitive to optical interference received at an operational wavelength of the optical network.

6. The method of claim 5, wherein the second optical transmitter is substantially insensitive to optical interference received at the operational wavelength of the optical network.

7. The method claim 4, further comprising selecting a Fabry-Perot laser as at least one of the first and second optical transmitters.

8. The method of claim 3, wherein the high transmittance ratio, T_R, and the low transmittance ratio, T_R, comprise a combination of ratios that is about 90/10.