Phase-Matching and Parametric Conversion for the Mid-Infrared in As&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt;S&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt; Waveguides

Chen, Qi; Wang, Xin; Madsen, C.K.

doi:10.4236/opj.2012.24031

Cited by 4 publications

(4 citation statements)

References 22 publications

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“…MgF 2 , which has wide transmission range (0.2 μm -7 μm) at mid-IR, is a good candidate for cladding material because of its ruggedness and durability. It also keeps the potential of optical tuning by adding electrodes on it [8]. Since the phase-matching condition is met at 1.32 μm, 4.6 μm and the region around the pump wavelength, which means that this design can provide high efficiency FWM process.…”

Section: Four-wave Mixingmentioning

confidence: 97%

“…The eSNR improvement is defined by comparing the eSNR of InGaAs photodetector to those of PbSe and MCT mid-IR photodetectors, as described by Equation (8)…”

Section: Esnr Improvementmentioning

confidence: 99%

“…Previously, we successfully fabricated low-loss As 2 S 3 -on-LiNbO 3 for mid-IR at 4.8 µm [3]- [7]. Taking advantage from it, our phasematched As 2 S 3 -on-LiNbO 3 waveguides can be utilized to achieve high efficiency FWM [8], which converts 4.6 µm mid-IR signals to 1.32 µm for indirect detection. With high parametric conversion efficiency, significant electrical signal-to-noise ratio improvement can be expected.…”

Section: Introductionmentioning

confidence: 99%

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Electrical Signal-to-Noise Ratio Enhancement in Detection of Mid-IR Signals by Four-Wave Mixing in As2S3-on-LiNbO3 Waveguides

Chen¹,

Madsen²

2016

OPJ

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Mid-infrared (mid-IR) signals can be converted to near-infrared (near-IR) wavelengths in As2S3on-LiNbO3 waveguides by high efficiency four-wave mixing. It provided us a solution to detect mid-IR signals indirectly by state-of-the-art near-IR detectors. High efficiency four-wave mixing was demonstrated and electrical signal-to-noise ratio (eSNR) improvement was also investigated. Compared to direct detection by PbSe and HgCdTe (MCT) mid-IR detectors, the calculation indicated that, at room temperature, the indirect detection to mid-IR signals increased the electrical signal-to-noise ratio up to 67 dB.

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Section: Four-wave Mixingmentioning

confidence: 97%

“…The eSNR improvement is defined by comparing the eSNR of InGaAs photodetector to those of PbSe and MCT mid-IR photodetectors, as described by Equation (8)…”

Section: Esnr Improvementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Electrical Signal-to-Noise Ratio Enhancement in Detection of Mid-IR Signals by Four-Wave Mixing in As2S3-on-LiNbO3 Waveguides

Chen¹,

Madsen²

2016

OPJ

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“…In recent years, researchers have employed MgF 2 glass as a cladding/ buffer layer/substrate for waveguide fabrications with chalcogenide glass for several mid-infrared region applications. In this regard, we propose an air-clad Si 3 N 4 waveguide which is designed using MgF 2 glass as a bottom cladding for the generation of a broadband SC spectral evolution at the waveguide output for various MIR region sensing and imaging applications [30,31].…”

Section: Introductionmentioning

confidence: 99%

Dispersion-engineered silicon nitride waveguides for mid-infrared supercontinuum generation covering the wavelength range 0.8–6.5 μm

2019

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We numerically demonstrate the generation of a mid-infrared supercontinuum (SC) through the design of an on-chip complementary metal oxide semiconductor (CMOS) compatible 10-mm-long air-clad rectangular waveguide made using stoichiometric silicon nitride (Si 3 N 4) as the core and MgF 2 glass as its lower cladding. The proposed waveguide is optimized for pumping in both the anomalous and all-normal dispersion regimes. A number of waveguide geometries are optimized for pumping at 1.55 µm with ultrashort pulses of 50-fs duration and a peak power of 5 kW. By initially keeping the thickness constant at 0.8 µm, four different structures are engineered with varying widths between 3 µm and 6 µm. The largest SC spectral evolution covering a region of 0.8 µm to beyond 6.5 µm could be realized by a waveguide geometry with a width of 3 µm. Numerical analysis shows that increasing width beyond 3 µm by fixing thickness at 0.8 µm results in a reduction of the SC extension in the long wavelength side. However, the SC spectrum can be enhanced beyond 6.5 µm by increasing the waveguide thickness beyond 0.9 µm with the same peak power and pump source. To the best of our knowledge, this is first time report of a broad SC spectral evolution through numerical demonstration in the mid-infrared region by the silicon nitride waveguide. In the case of all-normal dispersion pumping, a flatter SC spectra can be predicted with the same power and pump pulse but with a reduced bandwidth spanning 950-2100 nm.

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Demonstration of an As2S3-on-LiNbO3 Grating Coupler and its Application of Measuring a Grating-based Filter

Zhang

Madsen

2016

IEEE Photonics J.

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Phase-Matching and Parametric Conversion for the Mid-Infrared in As<sub>2</sub>S<sub>3</sub> Waveguides

Cited by 4 publications

References 22 publications

Electrical Signal-to-Noise Ratio Enhancement in Detection of Mid-IR Signals by Four-Wave Mixing in As2S3-on-LiNbO3 Waveguides

Electrical Signal-to-Noise Ratio Enhancement in Detection of Mid-IR Signals by Four-Wave Mixing in As2S3-on-LiNbO3 Waveguides

Dispersion-engineered silicon nitride waveguides for mid-infrared supercontinuum generation covering the wavelength range 0.8–6.5 μm

Demonstration of an As2S3-on-LiNbO3 Grating Coupler and its Application of Measuring a Grating-based Filter

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