Realizing coarse wavelength-division multiplexing using standard multimode optical fibers

Patent metadata

Field	Value
Publication number	US-9608761-B2
Application number	US-201514744259-A
Country	US
Kind code	B2
Filing date	Jun 19, 2015
Priority date	Mar 11, 2015
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

Tuning parameters of individual wavelength channels transmitted over a multimode optical fiber is provided. Characteristics of the multimode optical fiber used for an optical data link within an optical signal transmission system are retrieved. A wavelength channel grid including each central wavelength in a plurality of central wavelengths that corresponds to each particular wavelength channel in a plurality of wavelength channels used to transmit data via optical signals over the multimode optical fiber is determined. A maximum allowable data rate is calculated for each wavelength channel based on the characteristics of the multimode optical fiber at defined channel wavelengths, optical signal transceiver specifications, and data transmission performance requirements for the optical signal transmission system. Operational parameters are assigned to each wavelength channel based on the calculated maximum allowable data rate for each wavelength channel to achieve the data transmission performance requirements for the optical signal transmission system.

First claim

What is claimed is:

1. A computer-implemented method for tuning parameters of individual wavelength channels transmitted over a multimode optical fiber, the computer-implemented method comprising:
retrieving, by a processor, characteristics of the multimode optical fiber used for an optical data link within an optical signal transmission system;
determining, by the processor, a wavelength channel grid including each central wavelength in a plurality of central wavelengths that corresponds to each particular wavelength channel in a plurality of wavelength channels used to transmit data via optical signals over the multimode optical fiber;
calculating, by the processor, a maximum allowable data rate for each wavelength channel in the plurality of wavelength channels based on the characteristics of the multimode optical fiber at defined channel wavelengths, optical signal transceiver specifications, and data transmission performance requirements for the optical signal transmission system;
assigning, by the processor, operational parameters to each wavelength channel in the plurality of wavelength channels based on the calculated maximum allowable data rate for each wavelength channel in the plurality of wavelength channels to achieve the data transmission performance requirements for the optical signal transmission system; and
determining, by the processor, a bandwidth versus wavelength profile of the multimode optical fiber that transmits the plurality of wavelength channels;
providing, by the processor, an electrical data transmission signal to each wavelength channel in the plurality of wavelength channels, each wavelength channel comprises a laser diode of a specific wavelength and a laser diode driver and each wavelength channel is driven at a data transmission rate corresponding to the bandwidth of the multimode optical fiber at the wavelength of each wavelength channel based on the determined bandwidth versus wavelength profile of the multimode optical fiber; and
using, by the processor, a wavelength-division multiplexer to couple an optical data transmission signal from each laser diode corresponding to a particular wavelength channel in the plurality of wavelength channels into the multimode optical fiber to transmit the optical data transmission signal.

2. The computer-implemented method of claim 1 further comprising:
assessing, by the processor, data transmission performance during operation of the optical data link.

3. The computer-implemented method of claim 2 further comprising:
responsive to the processor determining that the assessed data transmission performance of the optical data link does not meet or exceed the data transmission performance requirements for the optical signal transmission system, calculating, by the processor, new operational parameters for one or more wavelength channels in the plurality of wavelength channels to achieve the data transmission performance requirements of the optical signal transmission system.

4. The computer-implemented method of claim 1 further comprising:
reducing, by the processor, an output power of one or more wavelength channels in the plurality of wavelength channels in response to not utilizing all of a bandwidth of the multimode optical fiber.

5. The computer-implemented method of claim 1 further comprising:
adjusting, by the processor, a data rate of one or more wavelength channels in the plurality of wavelength channels based on assessing data transmission performance of the multimode optical fiber.

6. The computer-implemented method of claim 1 further comprising:
disabling, by the processor, one or more wavelength channels in the plurality of wavelength channels in response to data transmission performance of the multimode optical fiber exceeding the data transmission performance requirements.

7. The computer-implemented method of claim 1 further comprising:
enabling, by the processor, one or more disabled wavelength channels in the plurality of wavelength channels in response to data transmission performance of the multimode optical fiber not meeting the data transmission performance requirements.

Assignees

• IBM

Inventors

• Doany Fuad E
• Kuchta Daniel M
• Lee Benjamin G
• Pepeljugoski Petar K
• Schow Clint L
• Soyuer Mehmet

Classifications

• H04J14/0241 Primary

  Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths · CPC title

• H04J14/02

  Wavelength-division multiplex systems · CPC title

• H04B10/2581 Primary

  Multimode transmission · CPC title

• H04B10/07957

  Monitoring or measuring wavelength · CPC title