Numerical simulation of a dual frequency all-optical flip-flop based on a nonlinear semiconductor distributed feedback laser structure

Abstract

A new all-optical flip-flop generating light at two different wavelengths ${\lambda }_1$ (state “$a$”), or ${\lambda }_2$ (state “$b$”) was suggested. It consists of an active layer and a nonlinear wave-guiding layer. Two parallel nonlinear gratings having different periods and periodic negative nonlinearities exist along the propagation direction in the wave-guiding layer. In state “$a$,” the first grating provides the optical feedback for lasing, and the second grating is weak. In state “$b$,” due to optical nonlinearity, the first grating weakens, and the second one provides the optical feedback for lasing. The refractive index nonlinearity is due to the direct absorption of photons at the Urbach tail. The device is triggered from state “$a$” to state “$b$” and vise versa by input optical pulses of wavelengths ${\lambda }_2$ and ${\lambda }_1$, respectively. The time domain simulations show switching dynamics in nanosecond time scale.

©2012 Optical Society of America

Theoretical modeling of an improved all-optical flip flop based on a nonlinear semiconductor distributed feedback laser structure

Hossam Zoweil
Appl. Opt. 49(28) 5199-5204 (2010)

Cross-phase modulation response of a DCC-DFB-SOA all-optical flip-flop

Masoud Jabbari, Mohammad Kazem Moravvej-Farshi, Rahim Ghayour, and Abbas Zarifkar
J. Opt. Soc. Am. B 26(9) 1720-1727 (2009)

All-optical hysteresis control by means of cross-phase modulation in semiconductor optical amplifiers

Drew N. Maywar, Govind P. Agrawal, and Yoshiaki Nakano
J. Opt. Soc. Am. B 18(7) 1003-1013 (2001)

All-optical flip-flop based on an active Mach–Zehnder interferometer with a feedback loop

R. Clavero, F. Ramos, and J. Martí
Opt. Lett. 30(21) 2861-2863 (2005)

Investigation of all-optical latching operation of a monolithically integrated SOA-MZI with a feedback loop

Yusuke Naito, Satoshi Shimizu, Tomoyuki Kato, Kohroh Kobayashi, and Hiroyuki Uenohara
Opt. Express 20(26) B339-B349 (2012)