Mode-selective coupler for wavelength multiplexing using LiNbO3:Ti optical waveguides

Runde, D.; Breuer, Stefan; Kip, Detlef

doi:10.2478/s11534-008-0078-1

Cited by 7 publications

(10 citation statements)

References 16 publications

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“…where the contribution coefficient (measure of field contribution), C is estimated using a numerical model based on sinusoidal mode Simple Effective Index Method (SEIM) [10]- [12] as, C 2 2 2 2 2 1 1 1 2 1 3 3 2 0 2 exp 2 exp 2 exp 1 2 exp 2 exp 2 exp 1 64 π (2) where C 0 is the normalized coefficient and…”

Section: Silicon Substratementioning

confidence: 99%

“…Using SEIM, the optical waveguide based designed conventional DC and conventional MMI coupler are fabricated with the help of available standard Silicon Oxynitride (SiON) technology [1][2][3][4][5][6][7] by means of standard Photolithography [1] and Reactive Ion Etching (RIE) [1] technique. At the outset, using PECVD method [1] a layer of Silicon dioxide (SiO 2 ) for lower cladding of 3 μm thickness and then SiON core layer of thickness ~2.0 μm has been deposited on a RCA cleaned <100> silicon wafer.…”

Section: Silicon Substratementioning

confidence: 99%

“…This optical property permits to develop low loss waveguides for long range application such as optical networks, optical communications, optical waveguide based sensor and integrated quantum optical circuits etc. The basic component of integrated optical devices (WDM, optical matrix switches, add/drop multiplexer, mode converter, filters) are directional coupler (DC) [1][2][3][4][5][6][7][8], two-mode interference (TMI) coupler [6][7][8][9][10] and multimode interference (MMI) coupler [10][11] etc.…”

Section: Introductionmentioning

confidence: 99%

“…Extensive studies have been made for the fabrication and implementation of such integrated optic (IO) devices using a variety of materials such as Lithium Niobate [1]- [2], polymers [1] [3], III-V semiconductors [4]- [5] and silicon based materials [1]- [6]. Out of these materials Silicon based materials have the potential to allow strong confinement of light with moderately low propagation losses, high index contrast, low material cost and its compatibility with well known conventional silicon based IC technology.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fabrication and comprehensive study of silicon oxynitride based compact directional coupler and multimode interference coupler

et al. 2013

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In this paper a comprehensive study of compact conventional Directional Coupler (DC) and Multimode Interference (MMI) coupler using a numerical model based on Simple Effective Index Method (SEIM) have been presented. The coupling length of the couplers is then compared with the results obtained by using commercially available Beam Propagation Method (BPM) based software with respect to different waveguide separation gap and different coupling gap's refractive indices. The designed couplers are fabricated using SiON as a core and silica as a cladding. It is found both from the experimental and theoretical results that the beat length of conventional MMI coupler is ~ 1.9 times lower than that of conventional DC.

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Section: Silicon Substratementioning

confidence: 99%

Section: Silicon Substratementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fabrication and comprehensive study of silicon oxynitride based compact directional coupler and multimode interference coupler

et al. 2013

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“…An S-bend waveguide of initial and final width w 2 , and bending length L b , is attached to the end of the SMW. The center-to-center separation between the output of the S-bend and the TMW is denoted S. All S-bends considered in this paper have dimensions L b = 10 mm and S = 127 µm (the standard spatial separation [41]). (d) The even-mode coupler is implemented by bringing a second TMW, of width w 1 and length L 3 , into proximity with the original TMW.…”

Section: Photonic Circuit For Generating Degenerate Photons In Differmentioning

confidence: 99%

Photonic Circuits for Generating Modal, Spectral, and Polarization Entanglement

et al. 2010

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We consider the design of photonic circuits that make use of Ti:LiNbO3 diffused channel waveguides for generating photons with various combinations of modal, spectral, and polarization entanglement. Down-converted photon pairs are generated via spontaneous optical parametric down-conversion (SPDC) in a two-mode waveguide. We study a class of photonic circuits comprising: 1) a nonlinear periodically poled two-mode waveguide structure, 2) a set of single-mode and two-mode waveguide-based couplers arranged in such a way that they suitably separate the three photons comprising the SPDC process, and, for some applications, 3) a holographic Bragg grating that acts as a dichroic reflector. The first circuit produces two frequency-degenerate down-converted photons, each with even spatial parity, in two separate single-mode waveguides. Changing the parameters of the elements allows this same circuit to produce two nondegenerate down-converted photons that are entangled in frequency or simultaneously entangled in frequency and polarization. The second photonic circuit is designed to produce modal entanglement by distinguishing the photons on the basis of their frequencies. A modified version of this circuit can be used to generate photons that are doubly entangled in mode number and polarization. The third photonic circuit is designed to manage dispersion by converting modal, spectral, and polarization entanglement into path entanglement.

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Programmable high-dimensional Hamiltonian in a photonic waveguide array

Yang,

Chapman,

Haylock

et al. 2024

Nat Commun

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Waveguide lattices offer a compact and stable platform for a range of applications, including quantum walks, condensed matter system simulation, and classical and quantum information processing. However, to date, waveguide lattice devices have been static and designed for specific applications. We present a programmable waveguide array in which the Hamiltonian terms can be individually electro-optically tuned to implement various Hamiltonian continuous-time evolutions on a single device. We used a single array with 11 waveguides in lithium niobate, controlled via 22 electrodes, to perform a range of experiments that realized the Su-Schriffer-Heeger model, the Aubrey-Andre model, and Anderson localization, which is equivalent to over 2500 static devices. Our architecture’s micron-scale local electric fields overcome the cross-talk limitations of thermo-optic phase shifters in other platforms such as silicon, silicon-nitride, and silica. Electro-optic control allows for ultra-fast and more precise reconfigurability with lower power consumption, and with quantum input states, our platform can enable the study of multiple condensed matter quantum dynamics with a single device.

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Mode-selective coupler for wavelength multiplexing using LiNbO3:Ti optical waveguides

Cited by 7 publications

References 16 publications

Fabrication and comprehensive study of silicon oxynitride based compact directional coupler and multimode interference coupler

Fabrication and comprehensive study of silicon oxynitride based compact directional coupler and multimode interference coupler

Photonic Circuits for Generating Modal, Spectral, and Polarization Entanglement

Programmable high-dimensional Hamiltonian in a photonic waveguide array

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