Lenses for Low-Loss Chip-to-Fiber and Fiber-to-Fiber Coupling Fabricated by 3D Direct-Write Lithography

Dietrich, Philipp; Reuter, I.; Blaicher, Matthias; Schneider, Sebastian; Billah, Muhammad Rodlin; Hoose, T.; Hofmann, Andreas; Caër, Charles; Dangel, R.; Offrein, Bert Jan; Möhrle, Martin G.; Troppenz, U.; Zander, Marlene; Freude, W.; Koos, C.

doi:10.1364/cleo_si.2016.sm1g.4

Cited by 15 publications

(15 citation statements)

References 9 publications

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“…One part is collimated by a chip-attached microlens, see Inset (3) of Fig. 1a [28], sent to the measurement target, and the backscattered light is coupled back into the on-chip waveguide and superimposed with a first portion of the LO comb in the measurement detector (Measurement PD) for multi-heterodyne detection. The other part of the signal comb is directly guided to the reference detector (Reference PD).…”

Section: Vision and Conceptmentioning

confidence: 99%

Ultrafast optical ranging using microresonator soliton frequency combs

Trocha

Karpov

Ganin

et al. 2018

Science

Self Cite

688

344

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Light detection and ranging is widely used in science and industry. Over the past decade, optical frequency combs were shown to offer advantages in optical ranging, enabling fast distance acquisition with high accuracy. Driven by emerging high-volume applications such as industrial sensing, drone navigation, or autonomous driving, there is now a growing demand for compact ranging systems. Here, we show that soliton Kerr comb generation in integrated silicon nitride microresonators provides a route to high-performance chip-scale ranging systems. We demonstrate dual-comb distance measurements with Allan deviations down to 12 nanometers at averaging times of 13 microseconds along with ultrafast ranging at acquisition rates of 100 megahertz, allowing for in-flight sampling of gun projectiles moving at 150 meters per second. Combining integrated soliton-comb ranging systems with chip-scale nanophotonic phased arrays could enable compact ultrafast ranging systems for emerging mass applications.

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Section: Vision and Conceptmentioning

confidence: 99%

Ultrafast optical ranging using microresonator soliton frequency combs

Trocha

Karpov

Ganin

et al. 2018

Science

Self Cite

688

344

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show abstract

“…We show beam forming elements with virtually arbitrary three-dimensional geometry, which do not only allow adaptation of vastly different mode profiles, but can also relax alignment tolerances to the extent that simple and cost-efficient passive assembly processes can be used. In first a set of experiments, we expand on our earlier work 28,29 and demonstrate highly efficient coupling between SMF and edge-emitting semiconductor lasers using beam shaping elements either at the laser or the fiber facet, thereby demonstration coupling losses down to 0.6 dB (coupling efficiencies  of up to 88 %). In a second set of experiments, we further show that in-situ printing of curved mirror surfaces for simultaneously defining beam shape and propagation direction opens up vast design freedom for optical assemblies by allowing to flexibly combine surface-emitting and edge-emitting devices in compact arrangements.…”

mentioning

confidence: 94%

In situ 3D nanoprinting of free-form coupling elements for hybrid photonic integration

et al. 2018

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Hybrid photonic integration exploits complementary strengths of different material platforms, thereby offering superior performance and design flexibility in comparison to monolithic approaches. This applies in particular to multi-chip concepts, where components can be individually optimized and tested on separate dies before integration into more complex systems. The assembly of such systems, however, still represents a major challenge, requiring complex and expensive processes for high-precision alignment as well as careful adaptation of optical mode profiles. Here we show that these challenges can be overcome by in-situ nano-printing of freeform beam-shaping elements to facets of optical components. The approach is applicable to a wide variety of devices and assembly concepts and allows adaptation of vastly dissimilar mode profiles while considerably relaxing alignment tolerances to the extent that scalable, cost-effective passive assembly techniques can be used. We experimentally prove the viability of the concept by fabricating and testing a selection of beam-shaping elements at chip and fiber facets, achieving coupling efficiencies of up to 88 % between an InP laser and an optical fiber. We also demonstrate printed freeform mirrors for simultaneously adapting beam shape and propagation direction, and we explore multi-lens systems for beam expansion. The concept paves the way to automated fabrication of photonic multi-chip assemblies with unprecedented performance and versatility.

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“…A true 3D capable method such as 2PP-DLW allows for full freeform designs without restrictions on the size of the micro-optics [16]. Exemplary realized designs are micro-prisms [2], single-tier micro-lenses [17,18], multi-tier lenses with undercuts and hidden features [19]. As mentioned above, the typical limitation of 2PP-DLW is the writing time and thus writing area and height.…”

Section: Layering Versus Postprocessing For Roughness Smootheningmentioning

confidence: 99%

Surface smoothening of the inherent roughness of micro-lenses fabricated with 2-photon lithography

Schift

Kirchner

Chidambaram

et al. 2018

Nanophotonics Australasia 2017

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Two-photon polymerization by direct laser writing enables to write refractive micro-optical elements with sub-µm precision. The trajectories and layering during the direct writing process often result in roughness in the range of the writing increment, which has adverse effects for optical applications. Instead of increasing overlap between adjacent voxels, roughness in the range of 100 nm can be smoothed out by post-processing. For this a method known as TASTE was developed, which allows polishing of surfaces without changing the structural details or the overall shape. It works particularly well with thermoplastic polymers and enables sub-10 nm roughness. The optical quality was confirmed for an array with several 100 microlenses.

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Lenses for Low-Loss Chip-to-Fiber and Fiber-to-Fiber Coupling Fabricated by 3D Direct-Write Lithography

Cited by 15 publications

References 9 publications

Ultrafast optical ranging using microresonator soliton frequency combs

Ultrafast optical ranging using microresonator soliton frequency combs

In situ 3D nanoprinting of free-form coupling elements for hybrid photonic integration

Surface smoothening of the inherent roughness of micro-lenses fabricated with 2-photon lithography

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