Journal ArticleDOI
An all-optical switch employing the cascaded second-order nonlinear effect
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TLDR
In this paper, a cascaded second-order nonlinear switch based on a Mach-Zehnder interferometer with quasi-phase matching has been proposed, which can switch with power around 1.3 W in a length of approximately 1 cm.Abstract:
A new, ultrafast, low loss, all-optical switch based on the cascaded second-order nonlinearity is proposed. The device is based on an integrated Mach-Zehnder interferometer where quasi-phase matching produces a nonlinear phase shift with a different sign in each arm of the interferometer. A full treatment of the nonlinear phase shift indicates that the proposed device, if fabricated in AlGaAs, could switch with powers around 1.3 W in a length of approximately 1 cm. >read more
Citations
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Journal ArticleDOI
χ(2) cascading phenomena and their applications to all-optical signal processing, mode-locking, pulse compression and solitons
TL;DR: Cascading is the process by which the exchange of energy between optical beams interacting via second order nonlinearities leads to various effects such as nonlinear phase shifts, the generation of new beams, all-optical transistor action, the formation of soliton-like (solitary) waves, etc as mentioned in this paper.
Journal ArticleDOI
DC current induced second order optical nonlinearity in graphene.
TL;DR: It is found that the maximum value of the effective second order susceptibility appears when the fundamental photon energy matches the chemical potential.
Journal ArticleDOI
Femtosecond second-harmonic generation in periodically poled lithium niobate waveguides with simultaneous strong pump depletion and group-velocity walk-off
TL;DR: In this article, the second-harmonic generation (SHG) of femtosecond pulses in long periodically poled lithium niobate waveguides under large conversion conditions was studied.
Journal ArticleDOI
All-optical switching based on nondegenerate phase shifts from a cascaded second-order nonlinearity.
TL;DR: A Mach-Zehnder waveguide device is proposed to take advantage of this process and has applications for all-optical switching and demultiplexing, potentially at power levels near 10 W by using quasi-phase matching in semiconductor waveguides.
Journal ArticleDOI
Intensity-dependent polarization rotation associated with type II phase-matched second-harmonic generation: application to self-induced transparency
L Lefort,A Barthelemy +1 more
TL;DR: It is shown that a polarization rotation of the fundamental, associated with type II second-harmonic generation, occurs when the e-wave and o-wave inputs carry unbalanced intensities and may be used to realize an optical limiter.
References
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Journal ArticleDOI
Interactions between light waves in a nonlinear dielectric
TL;DR: In this paper, the induced nonlinear electric dipole and higher moments in an atomic system, irradiated simultaneously by two or three light waves, are calculated by quantum-mechanical perturbation theory.
Journal ArticleDOI
Quasi-phase-matched second harmonic generation: tuning and tolerances
TL;DR: The theory of quasi-phase-matched second-harmonic generation in both the space domain and the wave vector mismatch domain is presented in this paper, where various types of errors in the periodicity of these structures are analyzed to find their effects on the conversion efficiency and on the shape of the tuning curve.
Journal ArticleDOI
Self-focusing and self-defocusing by cascaded second-order effects in KTP.
Richard DeSalvo,David J. Hagan,Mansoor Sheik-Bahae,George I. Stegeman,E. W. Van Stryland,H. Vanherzeele +5 more
TL;DR: This work monitors the induced phase change produced by a cascaded chi((2)):chi((2)) process in KTP near the phase-matching angle on a picosecond 1.06-microm-wavelength beam using the Z-scan technique and predicts the maximum small-signal effective nonlinear refractive index.
Journal ArticleDOI
Efficient type I blue second‐harmonic generation in periodically segmented KTiOPO4 waveguides
TL;DR: In this article, the authors report type I phase matched blue second-harmonic generation from periodically segmented channel ion exchanged waveguides in KTiOPO4 with output wavelengths from 0.38 to 0.48 μm and efficiencies exceeding 50%/W cm2.
Journal ArticleDOI
Blue light generation by frequency doubling in periodically poled lithium niobate channel waveguide
TL;DR: In this paper, the blue light at 410 nm was generated by continuous-wave frequency doubling in a periodically poled lithium niobate channel waveguide at room temperature, using the d/sub 33/nonlinear coefficient.