A complex multi-notch astronomical filter to suppress the bright infrared sky

Bland-Hawthorn, Joss; Ellis, S. C.; Leon-Saval, Sergio G.; Haynes, Roger; Roth, Martin; Löhmannsröben, Hans‐Gerd; Horton, Anthony; Cuby, Jean-Gabriel; Birks, T. A.; Lawrence, Jon; Gillingham, Peter; Ryder, S. D.; Trinh, Christopher

doi:10.1038/ncomms1584

Cited by 126 publications

(83 citation statements)

References 20 publications

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“…Further integration of advanced fiber-based components, e.g., fiber-based Bragg gratings [32], with the existing optical components, would allow the separation of signals of interest (e.g., Raman) and minimizing unwanted background signals (e.g., from silica). Further refinement of chip design (e.g., optimization of distance between the ends of the two cleaved fibers) will enhance the detection range and sensitivity for in-fiber Raman spectroscopy and other spectroscopic techniques.…”

Section: Discussionmentioning

confidence: 99%

“…Finally, the multilevel fabrication scheme described here can also be used to implement more complex geometries where optical and fluidic elements are separated [10,11], thus significantly broadening the number of possible LoC applications of the technology including optogenetic stimulation and detection [32], shape recognition [3], and flow cytometry [33].…”

Section: Discussionmentioning

confidence: 99%

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Fiber-Based, Injection-Molded Optofluidic Systems: Improvements in Assembly and Applications

et al. 2015

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Abstract:We present a method to fabricate polymer optofluidic systems by means of injection molding that allow the insertion of standard optical fibers. The chip fabrication and assembly methods produce large numbers of robust optofluidic systems that can be easily assembled and disposed of, yet allow precise optical alignment and improve delivery of optical power. Using a multi-level chip fabrication process, complex channel designs with extremely vertical sidewalls, and dimensions that range from few tens of nanometers to hundreds of microns can be obtained. The technology has been used to align optical fibers in a quick and precise manner, with a lateral alignment accuracy of 2.7˘1.8 µm. We report the production, assembly methods, and the characterization of the resulting injection-molded chips for Lab-on-Chip (LoC) applications. We demonstrate the versatility of this technology by carrying out two types of experiments that benefit from the improved optical system: optical stretching of red blood cells (RBCs) and Raman spectroscopy of a solution loaded into a hollow core fiber. The advantages offered by the presented technology are intended to encourage the use of LoC technology for commercialization and educational purposes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Fiber-Based, Injection-Molded Optofluidic Systems: Improvements in Assembly and Applications

et al. 2015

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“…These include for example 'photonic lanterns' that can efficiently transfer light from highly multimoded waveguides to a large number of identical single-mode channels 24 , as well as individually phase-matched single-mode Note that in all cases, the highest accessible layer is exclusively populated in its node-free ground mode. The mixtures of modes in (b) and (c) were prepared by tilting the input wave front at appropriate angles.…”

Section: Supersymmetric Optical Structuresmentioning

confidence: 99%

Supersymmetric mode converters

et al. 2014

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Originally developed in the context of quantum field theory, the concept of supersymmetry can be used to systematically design a new class of optical structures. In this work, we demonstrate how key features arising from optical supersymmetry can be exploited to control the flow of light for mode-division multiplexing applications. Superpartner configurations are experimentally realized in coupled optical networks, and the corresponding light dynamics in such systems are directly observed. We show that supersymmetry can be judiciously used to remove the fundamental mode of a multimode optical structure while establishing global phase-matching conditions for the remaining set of modes. Along these lines, supersymmetry may serve as a promising platform for versatile optical components with desirable properties and functionalities.

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“…There are two major drivers in astronomy for the photonic lantern technology: one is the use of singlemode photonic technologies such as Fiber Bragg Gratings (FBG) [30] and Arrayed Waveguide Gratings [31,32], and the second is a push towards more compact, stable and precise next generation astronomical spectrographs working in the diffraction limited regime [33,34] and hence requiring single-mode fiber inputs. The latter also has direct applications to small satellite instrumentation and exoplanets research.…”

Section: Astronomy and Spectroscopymentioning

confidence: 99%

Photonic lanterns

2013

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Multimode optical fibers have been primarily (and almost solely) used as "light pipes" in short distance telecommunications and in remote and astronomical spectroscopy. The modal properties of the multimode waveguides are rarely exploited and mostly discussed in the context of guiding light. Until recently, most photonic applications in the applied sciences have arisen from developments in telecommunications. However, the photonic lantern is one of several devices that arose to solve problems in astrophotonics and space photonics. Interestingly, these devices are now being explored for use in telecommunications and are likely to find commercial use in the next few years, particularly in the development of compact spectrographs. Photonic lanterns allow for a low-loss transformation of a multimode waveguide into a discrete number of single-mode waveguides and vice versa, thus enabling the use of single-mode photonic technologies in multimode systems. In this review, we will discuss the theory and function of the photonic lantern, along with several different variants of the technology. We will also discuss some of its applications in more detail. Furthermore, we foreshadow future applications of this technology to the field of nanophotonics.

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A complex multi-notch astronomical filter to suppress the bright infrared sky

Cited by 126 publications

References 20 publications

Fiber-Based, Injection-Molded Optofluidic Systems: Improvements in Assembly and Applications

Fiber-Based, Injection-Molded Optofluidic Systems: Improvements in Assembly and Applications

Supersymmetric mode converters

Photonic lanterns

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