ITTC Project


High Resolution Optical Spectrum Analyzer for Optical System Link Quality Monitoring

Project Award Date: 06-01-1999



Description

Increasing bandwidth in optical networks brings both greater system capacity and the challenge to carry that capacity at good quality over long distances. This increasing stress on quality has put greater importance on optical network management. The need for consistent quality monitoring, however, comes at a time when the networks themselves are more complex and more difficult to manage.

To check the quality of an optical transmission system, traditional electronic domain performance monitoring needs opto-electronic conversion for each individual wavelength channel.

For WDM (wavelength division multiplexed) optical networks with a large number of wavelength channels, optical domain performance monitoring is more efficient and cost effective compared to its electronic domain counterpart. An optical spectrum analyzer is more efficient because it can scan through all the wavelength channels simultaneously and save carriers both time and money.

But when it comes to checking a channel's modulation and data rate, most analysis systems cannot distinguish frequency components within a resolution bandwidth of 10 GHz, so they are unable to see the modulation performance and data rate of optical signal.

During this yearlong project, the team investigated various ways to build an ultra high-resolution, optical spectrum analyzer that had good resolution, wide spectrum range and compact size. Conventional optical spectrum analyzers that use defraction gratings may have wide spectrum range, but they have relatively poor resolution or big size. To achieve good spectral resolution, wide optical bandwidth and can potentially be packed into a circuit card, Hui combined the excellent spectral resolution of Febry-Perot interferometer and the wide bandwidth of thin film WDM optical demultiplexers.

Hui sees a good commercial application to the analyzer developed at ITTC. His team made the analyzer box both smaller and significantly cheaper than other systems, and it will fit into the transmission system rack.


Investigators

Faculty Investigator(s): Rongqing Hui (PI)


Project Sponsors


Primary Sponsor(s): Nortel Networks


Partner with ITTC

The Information and Telecommunication Technology Center at the University of Kansas has developed several assistance policies that enhance interactions between the Center and local, Kansas, or national companies. 

ITTC assistance includes initial free consulting (normally one to five hours). If additional support is needed, ITTC will offer one of the following approaches: 

Sponsored Research Agreement

Individuals and organizations can enter into agreements with KUCR/ITTC and provide funds for sponsored research to be performed at ITTC with the assistance of faculty, staff and students.

Licensing and Royalty/Equity Agreement

An ITTC goal is the development of investment-grade technologies for transfer to, and marketing by, local, Kansas, and national businesses. To enhance this process, the Center has developed flexible policies that allow for licensing, royalty, and equity arrangements to meet both the needs of ITTC and the company.

Commercialization Development

Companies with a technology need that can be satisfied with ITTC's resources can look to us for assistance. We can develop a relationship with interested partners that will provide for the development of a technology suited for commercialization.

ITTC Resource Access

ITTC resources, including computers and software systems, may be made available to Kansas companies in accordance with the Center's mission and applicable Regents and University policies.

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