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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 18 — Sep. 9, 2013
  • pp: 21224–21235

Counterdiabatic mode-evolution based coupled-waveguide devices

Shuo-Yen Tseng  »View Author Affiliations


Optics Express, Vol. 21, Issue 18, pp. 21224-21235 (2013)
http://dx.doi.org/10.1364/OE.21.021224


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Abstract

The goal in designing mode-evolution based devices is to realise short and high-fidelity components. The counterdiabatic protocol in coherent quantum state control can be used to cancel unwanted coupling between adiabatic modes in mode evolution but is not directly realisable in the coupled-waveguide system. By finding alternative coupled-mode equations that links to the same interaction picture dynamical equation as the counterdiabatic protocol via unitary transformations, we have derived a universal formalism for the design of short and high-fidelity mode-evolution based coupled-waveguide devices. Starting from a traditional adiabatic device design, the counterdiabatic protocol leads to a high-fidelity device, with its evolution following the adiabatic modes exactly even when the adiabatic condition is violated. Tolerance analysis shows that the countera-diabatic devices combine the advantages of adiabatic and resonant devices. The formalism is used to design asymmetric waveguide couplers.

© 2013 OSA

OCIS Codes
(000.1600) General : Classical and quantum physics
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(130.2790) Integrated optics : Guided waves
(130.3120) Integrated optics : Integrated optics devices

ToC Category:
Integrated Optics

History
Original Manuscript: August 12, 2013
Manuscript Accepted: August 19, 2013
Published: September 3, 2013

Citation
Shuo-Yen Tseng, "Counterdiabatic mode-evolution based coupled-waveguide devices," Opt. Express 21, 21224-21235 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-18-21224


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