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

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, Jian Wang, Junqiang Sun, 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); doi: 10.1117/12.667020; https://doi.org/10.1117/12.667020

ACCESS THE FULL ARTICLE

PERSONAL SIGN IN
Full access may be available with your subscription

Email or Username Forgot your username?

Password Forgot your password?

Show

Remember Email/Username on this computer

Remember Password

No SPIE account? Create an account
or Institutional Sign In via Shibboleth

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

Members: $14.40

Non-members: $18.00 ADD TO CART

Show All Keywords

Keywords/Phrases

Search In:

Publication Years