Silica waveguide (SiWG)-based dynamic gain equalizing filter (DGEF)

Chellappan Narayanan; Gail A. Bogert; Robert M. Pafchek; Said Belhaj

doi:10.1117/12.475517

11 July 2002 Silica waveguide (SiWG)-based dynamic gain equalizing filter (DGEF)

Chellappan Narayanan, Gail A. Bogert, Robert M. Pafchek, Said Belhaj

Proceedings Volume 4870, Active and Passive Optical Components for WDM Communications II; (2002) https://doi.org/10.1117/12.475517
Event: ITCom 2002: The Convergence of Information Technologies and Communications, 2002, Boston, MA, United States

Abstract

Equalization of power divergence over the wavelength spectrum is very important in optical WDM networks for optimizing the link performance and maximizing the transmission distance of the link, thereby reducing the cost/bit/km of transmission. In addition to extending the reach of long-haul networks, the ability to from a remote terminal to dynamically equalize the power level changes due to long-term aging of fibers and components, reduces system maintenance costs of today's point-to-point links. As the network evolves to include optical cross-connects and re-configurable optical add-drop nodes for agile and dynamic provisioning, the dynamic gain equalization function allows the ability to compensate the gain variation of the optical amplifiers resulting from varying input power levels. In this presentation we will talk about the DGEF based on silica-on-silicon technology. The device is based on cascading an arrayed waveguide grating (AWG) based de-multiplexer which separates the wavelengths into different bands, an array of Mach-Zhender interferometer (MZI) based attenuators, and an AWG-based multiplexer which recombines all the wavelength bands in to one fiber, all of which are monolithically integrated on one die. The dynamic tuning of the attenuation is achieved by varying the phase of one of the arms of the MZI using the thermo-optic effect. We will present the theory of the DGEF, talk about the control algorithm that is used to obtain the control parameters, and discuss the limitations of the device.

Citation Download Citation

Chellappan Narayanan, Gail A. Bogert, Robert M. Pafchek, and Said Belhaj "Silica waveguide (SiWG)-based dynamic gain equalizing filter (DGEF)", Proc. SPIE 4870, Active and Passive Optical Components for WDM Communications II, (11 July 2002); https://doi.org/10.1117/12.475517

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available