Wavelength conversions ∼1.5 μm by difference frequency generation in periodically domain-inverted LiNbO3 channel waveguides

Xu, Chang Qing; Okayama, Hideaki; Shinozaki, K.; Watanabe, Kenji; Kawahara, M.

doi:10.1063/1.109812

Cited by 64 publications

(15 citation statements)

References 6 publications

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“…For a fixed Ak, we verified that Wf scales as WW, .We define -2 -14-2 32 (3) the quantity = WfWp W n L AX . The absolute value of Xeff can be obtained by comparison with a material ofknown .…”

Section: Resultsmentioning

confidence: 99%

<title>Second-order cascaded frequency shifting and signal amplification in organic and inorganic crystals</title>

et al. 1999

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We report wavelength shifting (generation of a pulse at the wavelength 2-AX from a signal at 2,+A2 under the action of a pump at ?) and parametric amplification through a cascaded second order process in a periodically poled lithium niobate crystal and also in an organic crystal N-(4-nitrophenyl)-L-prolinol (NPP). NPP could convert signal pulse (from 1 .16 to 1 . 14 rim) with unit gain under the action of a pump pulse (at 1 .1 5 pm) of peak intensity as low as 9 MW/cm2. In the limit ofnegligible conversion, where the cascading effect can be described through an effective we derive for NPPIx7 2.4 x 1017 rn2/V2 , which is iO2 larger than of conjugated polymers or semiconductors. In a 19 lTflifl long PPLN sample, at ?=l .8 pin and zX as large as 60 nm, we could obtain unit gain with a pump intensity of 6 MW/cm2, while amplification by a factor of 1 0 requires 1 8 MW/cm2. We also present a theoretical comparison between frequency mixing and cascading.

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Section: Resultsmentioning

confidence: 99%

<title>Second-order cascaded frequency shifting and signal amplification in organic and inorganic crystals</title>

et al. 1999

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“…It has been pointed out that wavelength conversion is a key to the WDM network in this case [9]. For wavelength conversion, difference frequency conversion in a wide wavelength range and up-converters with a wavelength demultiplexing property have been studied by using periodic domain inversion structure media [10,11]. Also, PRCM (Photorefractive Connection Module) has been proposed, in which optical signals are extracted by an optical control signal in photorefractive orthogonally polarized four-wave mixing [12].…”

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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“…QPM difference frequency generation (DFG) has been demonstrated in LiNbO 3 waveguides using domain-inverted gratings formed by Ti-indiffused technique. [4][5][6] Application of the DFG devices includes a mid-IR light source for spectroscopy or chemical sensors, wavelength converter for high-speed optical signal processing, 7) and wavelength switch for multiplexed communication networks. 5,6) In this letter we demonstrate LiNbO 3 waveguide QPM-DFG devices with domain-inverted gratings fabricated by the voltage application technique.…”

Section: Introductionmentioning

confidence: 99%

Wavelength Conversion in LiNbO₃ Waveguide Difference-Frequency Generation Devices with Domain-Inverted Gratings Fabricated by Voltage Application

Fujimura

Shiratsuki

Suhara

et al. 1998

Jpn. J. Appl. Phys.

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LiNbO 3 waveguide quasi-phasematched (QPM) difference-frequency generation (DFG) devices were studied for wavelength conversion in wavelength range of 1-2 µm. The device performance was analyzed, and DFG output power was estimated to be 1.0 mW for 10 mW signal power, 500 mW pump power, and 3 mm interaction length. A prototype device was fabricated for DFG at 1.67 µm wavelength from 1.54 µm signal and 0.8 µm pump. Voltage application technique was successfully used in fabrication of ferroelectric domain inverted gratings for QPM. DFG experiments were performed using a distributed feedback laser diode as a signal light source and a Ti:Al 2 O 3 laser as a pump light source, and DFG light of 1.67 µm wavelength was obtained.

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Wavelength conversions ∼1.5 μm by difference frequency generation in periodically domain-inverted LiNbO3 channel waveguides

Cited by 64 publications

References 6 publications

<title>Second-order cascaded frequency shifting and signal amplification in organic and inorganic crystals</title>

<title>Second-order cascaded frequency shifting and signal amplification in organic and inorganic crystals</title>

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

Wavelength Conversion in LiNbO₃ Waveguide Difference-Frequency Generation Devices with Domain-Inverted Gratings Fabricated by Voltage Application

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Wavelength conversions ∼1.5 μm by difference frequency generation in periodically domain-inverted LiNbO3 channel waveguides

Cited by 64 publications

References 6 publications

<title>Second-order cascaded frequency shifting and signal amplification in organic and inorganic crystals</title>

<title>Second-order cascaded frequency shifting and signal amplification in organic and inorganic crystals</title>

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

Wavelength Conversion in LiNbO3 Waveguide Difference-Frequency Generation Devices with Domain-Inverted Gratings Fabricated by Voltage Application

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Wavelength Conversion in LiNbO₃ Waveguide Difference-Frequency Generation Devices with Domain-Inverted Gratings Fabricated by Voltage Application