All-optical 40Gbit/s format conversion from NRZ to RZ based on SFG in a PPLN waveguide

Jian Wang; Junqiang Sun

doi:10.1117/12.667020

28 January 2006 All-optical 40Gbit/s format conversion from NRZ to RZ based on SFG in a PPLN waveguide

Jian Wang, Junqiang Sun

Proceedings Volume 6025, ICO20: Optical Communication; 60250T (2006) https://doi.org/10.1117/12.667020
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

A novel all-optical 40Gbit/s NRZ-to-RZ data format conversion scheme based on sum-frequency generation (SFG) interaction in a periodically poled LiNbO³ (PPLN) waveguide is presented for the first time, using a Mach-Zehnder interferometer (MZI). The conversion mechanism relies on the combination of attenuation and nonlinear phase shift Φ_NL induced on the signal field. The performance of the conversion is numerically evaluated, with the result showing that it is more effective to yield Φ_NL when appropriately phase mismatched for SFG process but Φ_NL≈0 when quasi-phase-matching (QPM). Compared with the cascaded second-order nonlinear interactions (SHG+DFG) with the influence of walk-off effect, a high conversion efficiency and good performance are achieved with peak power 500mw and width 2ps of the pump, which can be used in super high-speed situation (40Gbit/s and above). Finally, the inverse process of SFG and corresponding walk-off effect are analyzed and the optimum arrangement of power is proposed, showing that proper power, pump width, and waveguide length are necessary for achieving a satisfied conversion effect.

Citation Download Citation

Jian Wang and Junqiang Sun "All-optical 40Gbit/s format conversion from NRZ to RZ based on SFG in a PPLN waveguide", Proc. SPIE 6025, ICO20: Optical Communication, 60250T (28 January 2006); https://doi.org/10.1117/12.667020

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