Wavelength-selective photonic switching in paraelectric potassium lithium tantalate niobate

Agranat, Aharon J.; Secundo, Lavi; Golshani, Noam; Razvag, Meir

doi:10.1016/s0925-3467(01)00166-5

Cited by 30 publications

(8 citation statements)

References 3 publications

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“…The need for ultra-fast optical switching methods is continuously growing [1,2]. Several techniques were developed in the last decades, some of which were based on the electro-optic effect [3]. Most of these techniques use special materials, such as Potassium Lithium Tantalum Niobate (KLTN) crystals [4].…”

Section: Ultra-fast Electro-optic Polarized Switchmentioning

confidence: 99%

Optical Polarization Sensitive Ultra-Fast Switching and Photo-Electrical Device

2019

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Ultra-fast electrical switches activated with an optical-polarized light trigger, also called photo-polarized activated electrical switches, are presented. A set of new transistor circuits is switched by light from above, illuminating deep V-grooves, whose angle is sensitive to the polarization of the incident. Thus, this application may serve for encryption/decryption devices since the strongest electrical responsivity is only obtained for very specific spatial polarization directions of the illumination beam. When this V-groove is sufficiently narrow, the device mainly responds to one polarization and not to the other. In such a way, electrons are generated only for one specific polarization. While the nature of the data remains electronic, the modulation control is optic, creating a photo-induced current depending on the polarization direction. This coupled device acts as a polarization modulator as well as an intensity modulator. The article focuses on the integration of several devices in different configurations of circuitry: dual, triple, and multi-element. Case studies of several adjacent devices are presented with varying critical variables, such as the V-groove aperture dimensions. Analytical models and complementary numerical analyses are presented for the future smooth integration into Complementary Metal-Oxide-Semiconductor (CMOS) technology.

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Section: Ultra-fast Electro-optic Polarized Switchmentioning

confidence: 99%

Optical Polarization Sensitive Ultra-Fast Switching and Photo-Electrical Device

2019

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“…This effect is commonly used for the generation of holographic gratings acting as tunable filters and switches [61][62][63] or as wavelength converters [64]. This effect is commonly used for the generation of holographic gratings acting as tunable filters and switches [61][62][63] or as wavelength converters [64].…”

Section: Photorefractive Effectsmentioning

confidence: 99%

Physics of Optical Modulation

Zalevsky¹,

Abdulhalim²

2010

Integrated Nanophotonic Devices

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“…However, several problems have been pointed out, including slow response speed. Recently, high-speed optical switches, wavelength selection, and optical interconnection have been studied by application of an electric field (voltage) affecting the characteristics of photorefractive crystals [1][2][3][4]. The present authors have used BaTiO 3 crystals, with a large electro-optical coefficient, and have studied orthogonally polarized four-wave mixing with writing by ordinary rays and readout by extraordinary rays.…”

Section: Introductionmentioning

confidence: 99%

Electro-optic wavelength demultiplexing using phase-matching property of photorefractive orthogonal polarized pump four-wave mixing in BaTiO3

Koyanagi

Mishima

2005

Electron. Comm. Jpn. Pt. II

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SUMMARYAn electro-optic wavelength demultiplexer using photorefractive orthogonally polarized four-wave mixing with writing by ordinary rays and readout by extraordinary rays is proposed. The demultiplexing characteristics based on the phase-matching properties are theoretically studied. A refractive index grating is induced within a photorefractive crystal by optical interference of the wavelength-multiplexed signal and the forward pump light with the same channel wavelengths. An external electric field is applied to the crystal in such a way that the phase match condition (Bragg condition) is satisfied for the diffracted light of the backward pump by means of the refractive index grating. As a result, the desired channel signal can be converted to a diffracted signal for demultiplexing by scanning of the external electric field and of the input and output angles of the forward pump and the diffracted signal. As a specific crystal, BaTiO 3 is considered. Numerical calculations are used to investigate the demultiplexing characteristics when the signal light is incident normally on the crystal surface. It is found that demultiplexing by spatial separation with a sufficient crosstalk level is achievable with wavelength spacings up to about 0.2 nm, near the wavelength of 0.5145 µm for a crystal size of 4 mm × 4 mm. Since the external electric field is applied only in the direction affecting the refractive index of the read-out signal, the formed refractive index grating is not disturbed and high-speed response is possible.

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Wavelength-selective photonic switching in paraelectric potassium lithium tantalate niobate

Cited by 30 publications

References 3 publications

Optical Polarization Sensitive Ultra-Fast Switching and Photo-Electrical Device

Optical Polarization Sensitive Ultra-Fast Switching and Photo-Electrical Device

Physics of Optical Modulation

Electro-optic wavelength demultiplexing using phase-matching property of photorefractive orthogonal polarized pump four-wave mixing in BaTiO3

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