Evidence and modeling of paired ions and other loss mechanisms in erbium-doped silica fibers

Paul F. Wysocki; Jefferson L. Wagener; Michel J. F. Digonnet; H. John Shaw

doi:10.1117/12.141147

23 March 1993 Evidence and modeling of paired ions and other loss mechanisms in erbium-doped silica fibers

Paul F. Wysocki, Jefferson L. Wagener, Michel J. F. Digonnet, H. John Shaw

Proceedings Volume 1789, Fiber Laser Sources and Amplifiers IV; (1993) https://doi.org/10.1117/12.141147
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

To explain the sub-optimal performance of erbium-doped resonant fiber lasers and superfluorescent fiber sources observed experimentally, the effects of potential loss mechanisms are explored via computer simulations. Pump excited-state absorption (ESA) at 980 nm and 1.48 micrometers , and signal ESA are unable to explain the dependence of the observed effects on concentration. Cooperative upconversion among uniformly distributed erbium ions fails to explain the observed reduction in source slope efficiency with increasing concentration. On the other hand, rapid cross-relaxation between paired ions, which might form in high concentration fibers, can produce the observed dependences. Rate equations for paired ions are used to understand their saturation behavior and their effect on the slope and threshold of fiber sources. Methods to assess the fraction of paired ions are discussed. Measurements suggest that about 18% of the ions in an aluminum co-doped silica fiber with 5 X 10¹⁹ Er³⁺/cm³ are paired. The effects of paired ions on the gain of Er-doped fiber amplifiers are also briefly discussed.

Citation Download Citation

Paul F. Wysocki, Jefferson L. Wagener, Michel J. F. Digonnet, and H. John Shaw "Evidence and modeling of paired ions and other loss mechanisms in erbium-doped silica fibers", Proc. SPIE 1789, Fiber Laser Sources and Amplifiers IV, (23 March 1993); https://doi.org/10.1117/12.141147

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