ADVA Optical Networking has been granted a patent for a method that maximizes the channel capacity per optical channel in a wavelength division multiplexing (WDM) transmission system. The method involves using multiple optical channels in a WDM channel grid to transport optical signals and optimizing system performance parameters to maintain a calculated channel margin above a preset minimal value. The method aims to improve the efficiency and capacity of optical transmission systems. GlobalData’s report on ADVA Optical Networking gives a 360-degree view of the company including its patenting strategy. Buy the report here.

According to GlobalData’s company profile on ADVA Optical Networking, data center optical networking was a key innovation area identified from patents. ADVA Optical Networking's grant share as of June 2023 was 1%. Grant share is based on the ratio of number of grants to total number of patents.

Method for maximizing channel capacity in optical wdm transmission

Source: United States Patent and Trademark Office (USPTO). Credit: ADVA Optical Networking SE

A recently granted patent (Publication Number: US11689310B2) describes a method for maximizing the channel capacity per optical channel in an optical wavelength division multiplexing (WDM) transmission system. The method involves transmitting optical signals modulated with a specific format and symbol rate through an optical transmission link that includes a Reconfigurable Optical Add Drop Multiplexer (ROADM) or another optical filter. A controller associated with the transmitting and receiving transceivers is used to iteratively optimize a system performance parameter, Q, which depends on the link effective bandwidth and the generalized optical signal noise ratio. The goal is to maintain a calculated channel margin above a preset minimal value.

The patent also includes several additional claims and variations of the method. These include using a derivative of a bit error ratio or another performance metric as the system performance parameter, modulating the optical signal with a quadrature amplitude modulation (QAM) format or a probabilistically-shaped QAM format, optimizing the signal optical power based on the generalized optical signal noise ratio, calculating the link effective bandwidth by multiplying filter functions of link cascaded WSS modules and/or optical filters, and presetting the channel frequency slot and the initial value of the signal symbol rate.

Furthermore, the patent describes a wavelength division multiplexing (WDM) system that includes a transmitting transceiver, a receiving transceiver, a ROADM or another optical filter on the optical transmission link, and a controller. The controller is responsible for maximizing the channel capacity of each optical channel while maintaining the calculated channel margin above the preset minimal value.

Additionally, the patent includes a software-based WDM system design tool that can be used for planning an optical WDM transmission system. The tool allows for the selection of parameters for the transmitting and receiving transceivers to achieve maximum channel capacity per optical channel while maintaining the desired channel margin. The tool also involves iteratively optimizing the system performance parameter based on the link effective bandwidth and the generalized optical signal noise ratio.

Overall, this patent presents a method, system, and design tool for optimizing the channel capacity in an optical WDM transmission system by iteratively optimizing system performance parameters based on the link effective bandwidth and the generalized optical signal noise ratio.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.