Journal ArticleDOI
All-optical space switches with gain and principally ideal extinction ratios
TLDR
In this paper, three asymmetries in asymmetric Mach-Zehnder interferometer (MZI) configurations with SOA's on their arms are discussed. And the theoretical predictions are verified and found to be in excellent agreement with experiments for a switch with symmetric MZI splitters in a monolithically integrated InP waveguide version.Abstract:
Asymmetric Mach-Zehnder interferometer (MZI) configurations are proposed to build all-optical space switches with gain and principally ideal extinction ratios. Actually, three asymmetries in MZI configurations with semiconductor optical amplifiers (SOA's) on their arms are discussed. The asymmetries in the all-optical switches are necessary to overcome the extinction ratio limitations that are due to the disturbing gain changes that arise when control signals are introduced into the SOA's to induce the necessary refractive index change for switching. Starting from a generic MZI configuration with SOA's on the arms, a description in terms of transmission matrices is used and applied to identify 1/spl times/2 and 2/spl times/2 all-optical switch configurations with high on-state transmissions and close to ideally large extinction ratios. The theoretical predictions are verified and found to be in excellent agreement with experiments for a switch with symmetric MZI splitters in a monolithically integrated InP waveguide version that allows operation with equally or unequally biased SOA's.read more
Citations
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Journal ArticleDOI
Multimode interference couplers with tunable power splitting ratios
Juerg Leuthold,C.W. Joyner +1 more
TL;DR: In this paper, a compact multimode interference couplers with tunable power splitting ratios have been realized, which is needed to optimize ON-OFF ratios in interferometric devices and may find applications as extremely compact switches.
Journal ArticleDOI
Mach–Zehnder interferometer-based all-optical reversible logic gate
TL;DR: This paper proposes and design a novel scheme of Toffoli and Feynman gates in all-optical domain, described their principle of operations and used a theoretical model to assist this task, finally confirming through numerical simulations.
Journal ArticleDOI
All-optical switching at multi-100-Gb/s data rates with Mach-Zehnder interferometer switches
TL;DR: In this paper, experimental and theoretical results on ultrafast nonlinear dynamics in InGaAsP semiconductor optical amplifiers (SOAs) were presented, and the switching window with maximum transmission was shown to be 1.5 ps which translates into demultiplexing capabilities beyond 600 Gb/s.
Journal ArticleDOI
Cascadability and Regenerative Properties of SOA All-Optical DPSK Wavelength Converters
P. Vorreau,A. Marculescu,Jin Wang,Gunnar Böttger,B. Sartorius,Carsten Bornholdt,J. Slovak,M. Schlak,Christian Schmidt,Sagie Tsadka,Wolfgang Freude,Juerg Leuthold +11 more
TL;DR: In this article, a novel all-optical differential phase-shift keying wavelength converter based on semiconductor optical amplifier nonlinearities is demonstrated in the 25- to 40-Gb/s range with pseudorandom binary sequence of 27-1.
Journal ArticleDOI
All-Optical Modified Fredkin Gate
TL;DR: In this article, a modification of the Fredkin gate is proposed and an all-optical circuit of this modified gate is also designed using semiconductor optical amplifier on the Mach-Zehnder interferometer switch.
References
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Optical bandwidth and fabrication tolerances of multimode interference couplers
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Journal ArticleDOI
Planar monomode optical couplers based on multimode interference effects
TL;DR: In this article, the self-imaging property of a homogeneous multimoded planar optical waveguide has been applied in the design of passive planar monomode optical couplers based on multimode interference (MMI).
Journal ArticleDOI
Experimental investigation on high‐speed switching characteristics of a novel symmetric Mach–Zehnder all‐optical switch
TL;DR: In this article, a symmetric Mach-Zehnder (SMZ) all-optical switch is proposed, which achieves high speed switching and nearly square modulation, achieving the full width at half-maximum of the obtained wave form is 8 ps.
Journal ArticleDOI
Optical loop mirror with semiconductor laser amplifier
TL;DR: In this article, a nonlinear optical loop mirror employing a semiconductor laser amplifier (SLA) was reported, and the input-output characteristic was distinctly nonlinear, and when operating as an optical correlator, an extinction ratio of 13 dB was achieved.