Ultrafast optical switching using parity–time symmetric Bragg gratings

This paper reports on time-domain modeling of an optical switch based on the parity–time (PT) symmetric Bragg grating. The switching response is triggered by suddenly switching on the gain in the Bragg grating to create a PT-symmetric Bragg grating. Transient and dynamic behaviors of the PT Bragg gratings are analyzed using the time-domain numerical transmission line modeling method including a simple gain saturation model. The on/off ratio and the switching time of the PT Bragg grating optical switch are analyzed in terms of the level of gain introduced in the system and the operating frequency. The paper also discusses the effect the gain saturation has on the operation of the PT-symmetric Bragg gratings.

[1]  M. Martinelli,et al.  All-optical switching in phase-shifted fiber Bragg grating , 2000, IEEE Photonics Technology Letters.

[2]  Mohammad Kazem Moravvej-Farshi,et al.  A 2×2 spatial optical switch based on PT-symmetry. , 2011, Optics letters.

[3]  David W. P. Thomas,et al.  Generalized material models in TLM - part 3: materials with nonlinear properties , 2002 .

[4]  Sergey Eyderman,et al.  Waveguide structures with antisymmetric gain/loss profile. , 2010, Optics express.

[5]  Gain-switched CW fiber laser for improved supercontinuum generation in a PCF. , 2011, Optics express.

[6]  Tsampikos Kottos,et al.  Optical physics: Broken symmetry makes light work , 2010 .

[7]  F. Xia,et al.  High-throughput silicon nanophotonic wavelength-insensitive switch for on-chip optical networks , 2008 .

[8]  Zongfu Yu,et al.  What is — and what is not — an optical isolator , 2013, Nature Photonics.

[9]  Li Ge,et al.  PT-symmetry breaking and laser-absorber modes in optical scattering systems. , 2010, Physical review letters.

[10]  C. Christopoulos,et al.  Generalized material models in TLM .I. Materials with frequency-dependent properties , 1999 .

[11]  Usa,et al.  -symmetric electronics , 2012, 1209.2347.

[12]  Z. Musslimani,et al.  Beam dynamics in PT symmetric optical lattices. , 2008, Physical review letters.

[13]  D. Englund,et al.  All Optical Switching With a Single Quantum Dot Strongly Coupled to a Photonic Crystal Cavity , 2012, IEEE Journal of Selected Topics in Quantum Electronics.

[14]  Y. Kivshar,et al.  Nonlinear suppression of time reversals in PT-symmetric optical couplers , 2010, 1009.5428.

[15]  Ali Mostafazadeh,et al.  Invisibility and PT symmetry , 2012, 1206.0116.

[16]  M. Orenstein,et al.  Optical unidirectional devices by complex spatial single sideband perturbation , 2005, IEEE Journal of Quantum Electronics.

[17]  P. B. Johns.  On the Relationship Between TLM and Finite-Difference Methods for Maxwell's Equations (Short Paper) , 1987 .

[18]  Z. Musslimani,et al.  Theory of coupled optical PT-symmetric structures. , 2007, Optics letters.

[19]  Vijay Janyani,et al.  The Development of TLM Models for Nonlinear Optics , 2004 .

[20]  University of Central Florida,et al.  Unidirectional nonlinear PT-symmetric optical structures , 2010, 1005.5189.

[21]  A. Alexandrov,et al.  Integrability of Hurwitz partition functions , 2012 .

[22]  K. Worhoff,et al.  Silicon Oxynitride A Versatile Material for Integrated Optics Applications , 2002 .

[23]  Wolfgang J. R. Hoefer,et al.  The Transmission-Line Matrix Method--Theory and Applications , 1985 .

[24]  Christos Christopoulos,et al.  transmission-line modeling method , 1995 .

[25]  José Azaña,et al.  Nonreciprocal waveguide Bragg gratings. , 2005, Optics express.

[26]  A. Mostafazadeh.  Spectral singularities of complex scattering potentials and infinite reflection and transmission coefficients at real energies. , 2009, Physical review letters.

[27]  P. Russer,et al.  A field theoretical comparison of FDTD and TLM , 1995 .

[28]  M. Orenstein,et al.  Unidirectional complex grating assisted couplers. , 2004, Optics express.

[29]  U. Peschel,et al.  Parity–time synthetic photonic lattices , 2012, Nature.

[30]  Joseph Caulfield Schindler.  PT-symmetric electronics , 2013 .

[31]  Hui Cao,et al.  Unidirectional invisibility induced by PT-symmetric periodic structures. , 2011, Physical review letters.

[32]  Jianke Yang,et al.  Stability analysis for solitons in PT-symmetric optical lattices , 2012, 1201.2696.

[33]  M. Segev,et al.  Observation of parity–time symmetry in optics , 2010 .

[34]  C. Christopoulos,et al.  The Transmission-line Modeling Method: TLM , 1995, IEEE Antennas and Propagation Magazine.