Fast gain-transient recovery of cascaded EDFAs in WDM networks using a disturbance observer with a PID controller

Seoyong Shin; Sungchul Kim; Sungho Song

doi:10.1117/12.817989

18 November 2008 Fast gain-transient recovery of cascaded EDFAs in WDM networks using a disturbance observer with a PID controller

Seoyong Shin, Sungchul Kim, Sungho Song

Author Affiliations +

Proceedings Volume 7138, Photonics, Devices, and Systems IV; 71380P (2008) https://doi.org/10.1117/12.817989
Event: Photonics, Devices, and Systems IV, 2008, Prague, Czech Republic

Abstract

We propose a new method of minimizing the gain-transient recovery time of wavelength-division-multiplexing (WDM) signals in cascaded erbium-doped fiber amplifiers (EDFAs) in WDM network as the gain of signals in EDFA fluctuates due to channel add/drops. To minimize the gain-related errors at the receivers, the gain of the signal should be recovered back to its original level as fast as possible. In this paper, we have applied, for the first time in our knowledge, the wellknown control theory of disturbance observer technique to the control of gain-transient recovery of cascaded EDFAs. We have used a disturbance observer to detect and compensate the gain variations due to WDM channel add/drops. While the major compensation of the gain is performed by the disturbance observer, the fine control process for exact gain recovery is done by a proportional/integral/differential (PID) controller. The proposed gain control algorithm for EDFA was implemented by MATLAB and the performance of the technique was verified by simulations for the cases of different numbers of cascaded EDFAs in WDM networks. For simulation, we have used a commercially available numerical modeling software package such as the Optsim^TM. Simulation results show that the technique decreases the amount of gain-transient recovery time to less than 3μsec in all the cases. This amount of gain recovery time is just about 1% of the one for commercial WDM EDFAs in these days.

Citation Download Citation

Seoyong Shin, Sungchul Kim, and Sungho Song "Fast gain-transient recovery of cascaded EDFAs in WDM networks using a disturbance observer with a PID controller", Proc. SPIE 7138, Photonics, Devices, and Systems IV, 71380P (18 November 2008); https://doi.org/10.1117/12.817989

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