Large off-resonance nonlinear index changes at 1310 nm and 1545 nm observed in ytterbium-doped fiber

John W. Arkwright; Pitchaimuth Elango; Trevor Whitbread; Graham R. Atkins

doi:10.1117/12.258972

20 November 1996 Large off-resonance nonlinear index changes at 1310 nm and 1545 nm observed in ytterbium-doped fiber

John W. Arkwright, Pitchaimuth Elango, Trevor Whitbread, Graham R. Atkins

Proceedings Volume 2841, Doped Fiber Devices; (1996) https://doi.org/10.1117/12.258972
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

The resonant nonlinearity observed in rare-earth doped fiber is of interest for all-optical switching due to the very low pump powers needed to achieve complete switching. Large nonlinear effects have been observed previously in both erbium and neodymium doped fibers, however, these large effects cannot be explained by taking into account the change in absorption of local transitions alone. Two mechanisms have been suggested to account for these anomalously large index changes, namely thermally induced effects and far from resonance population dependent effects. In this work, an ytterbium doped twin-core fiber is used to investigate the tow possible mechanisms, and by allowing the doped fiber to lase and observing the clamping of the induced phase change, it is demonstrated that the effect is population dependent in nature. The observed wavelength response of the effect shows an increase in induced phase towards shorter wavelengths, which suggests that the effect is due principally to changes in strong absorptions in the UV. This far-from-resonance effect has been used to demonstrate large phase changes at the preferred telecommunications windows of 1300nm and 1550nm.

Citation Download Citation

John W. Arkwright, Pitchaimuth Elango, Trevor Whitbread, and Graham R. Atkins "Large off-resonance nonlinear index changes at 1310 nm and 1545 nm observed in ytterbium-doped fiber", Proc. SPIE 2841, Doped Fiber Devices, (20 November 1996); https://doi.org/10.1117/12.258972

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