Efficient single-mode fiber to titanium diffused lithium niobate waveguide coupling for λ = 1.32 µm

Alferness, R. C.; Ramaswamy, V.; Korotky, S.K.; Divino, M. D.; Buhl, L. L.

doi:10.1109/jqe.1982.1071390

Cited by 65 publications

(13 citation statements)

References 12 publications

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“…If we use KTP for state generation due to the possibility to tune the number of generated modes there, and LiNbO 3 for the pulse gate, a few percent of losses will be unavoidable due to differences in the waveguide shapes and sizes. Couplings up to 92% have been achieved between Ti-indifused LiNbO 3 waveguides and single mode fibres [28]. Similar values should be reasonable for couplings between Rb:KTP and Ti:LiNbO 3 waveguides.…”

Section: (B) Loss Limitssupporting

confidence: 68%

Harnessing temporal modes for multi-photon quantum information processing based on integrated optics

Harder

Ansari

Bartley

et al. 2017

Phil. Trans. R. Soc. A.

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In the last few decades, there has been much progress on low loss waveguides, very efficient photon-number detectors and nonlinear processes. Engineered sum-frequency conversion is now at a stage where it allows operation on arbitrary temporal broadband modes, thus making the spectral degree of freedom accessible for information coding. Hereby the information is often encoded into the temporal modes of a single photon. Here, we analyse the prospect of using multi-photon states or squeezed states in different temporal modes based on integrated optics devices. We describe an analogy between mode-selective sum-frequency conversion and a network of spatial beam splitters. Furthermore, we analyse the limits on the achievable squeezing in waveguides with current technology and the loss limits in the conversion process.This article is part of the themed issue 'Quantum technology for the 21st century'.

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Section: (B) Loss Limitssupporting

confidence: 68%

Harnessing temporal modes for multi-photon quantum information processing based on integrated optics

Harder

Ansari

Bartley

et al. 2017

Phil. Trans. R. Soc. A.

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“…Concerning the coupling of energy from the single-mode fiber to waveguide spectrometer, the coupling quality is very well correlated to the match between the fiber mode diameter and the waveguide geometric-mean diameter. [28][29][30][31] show that a wide range of coupling techniques are currently being explored with an efficiency as high as 95% (CEF#3 in Fig. 13).…”

Section: Innovative Methodsmentioning

confidence: 99%

Focal Plane Array Spectrometer FPAS: preliminary development results and recommendations

Madi¹,

Osowiecki²,

Alberti³

et al. 2021

International Conference on Space Optics — ICSO 2020

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The focal plane array spectrometer (FPAS) is a miniaturization concept for imaging spectrometers compared to classical dispersive and FTS instruments. FPAS is an imaging implementation of interferogram integrated FTS, targeting space-borne and commercial applications. It is based on a bi-dimensional array of waveguide spectrometers which can be assembled in small size, and form a compact package of single spectrometers. When this system is positioned in the focal plane of an objective (in a similar way as a CMOS detector array or a CCD in a camera), it will allow imaging spectrometry of the observed surface (objects). The instrument is therefore reduced to the imaging optics and the FPAS in the focal plane, which takes over the role of spectrometer and detector array. This is a breakthrough concept enabling imaging spectroscopy in a reduced volume with low power consumption. This article describes the preliminary development results of a FPAS based on arrays of single-mode waveguides. The developed linear array forms an acquisition line to image with lateral scanning. The light is injected with micro-lenses into several optical polymer waveguides. In order to circumvent the sub-sampling limitation due to nano-sampler spacing and to expand the spectral bandwidth, the basic principle of a static Lippmann spectrometer is combined with a dynamic Fourier-transform spectrometer, by adopting a piezo actuated movable mirror located at the waveguide end-facet. This waveguide spectrometer is designed for a nominal bandwidth of 25 nm at central wavelength of 762.5 nm and a spectral resolution of about 0.06 nm. The throughput and SNR in this preliminary linear array prototype are analysed and design limitations are discussed. The authors then introduce a new method for the realization of FPAS aiming at enhancing throughput and bandwidth of the integrated device. This new concept uses a bundle of single-mode waveguides, instead of only one, at the focal distance of the optical element. The novel FPAS concept is elaborated and its characteristics are described.

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“…Conventional LiNbO 3 waveguides are typically made by diffusion or proton-exchange methods [14,15]. Here, a novel technology that can realize much more compact LiNbO 3 devices on silicon substrates is introduced.…”

Section: The Novel Device Concept and Fabrication Methodsmentioning

confidence: 99%

Heterogeneous lithium niobate photonics on silicon substrates

Rabiei¹,

Ma²,

Khan³

et al. 2013

Opt. Express

233

122

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A platform for the realization of tightly-confined lithium niobate photonic devices and circuits on silicon substrates is reported based on wafer bonding and selective oxidation of refractory metals. The heterogeneous photonic platform is employed to demonstrate high-performance lithium niobate microring optical resonators and Mach-Zehnder optical modulators. A quality factor of ~7.2 × 10⁴ is measured in the microresonators, and a half-wave voltage-length product of 4 V.cm and an extinction ratio of 20 dB is measured in the modulators.

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Efficient single-mode fiber to titanium diffused lithium niobate waveguide coupling for λ = 1.32 µm

Cited by 65 publications

References 12 publications

Harnessing temporal modes for multi-photon quantum information processing based on integrated optics

Harnessing temporal modes for multi-photon quantum information processing based on integrated optics

Focal Plane Array Spectrometer FPAS: preliminary development results and recommendations

Heterogeneous lithium niobate photonics on silicon substrates

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