Towards low-loss lightwave circuits for non-classical optics at 800 and 1,550 nm

Meany, Thomas; Gross, Simon; Jovanović, Nemanja; Arriola, Alexander; Steel, M. J.; Withford, Michael J.

doi:10.1007/s00339-013-8090-8

Cited by 51 publications

(38 citation statements)

References 31 publications

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“…1g). For this purpose, the technique of ULI was used to directly inscribe (in the long axis) the reformatter inside the volume of a 30 × 15 × 1 mm substrate of borosilicate glass (SCHOTT AF45; Meany et al 2013). The fibre laser used for inscription emitted a 500-kHz train of 430-fs pulses at a wavelength of 1030 nm light.…”

Section: H Y B R I D R E F O R M At T E R D E S I G Nmentioning

confidence: 99%

Efficient photonic reformatting of celestial light for diffraction-limited spectroscopy

MacLachlan

Harris

Gris-Sánchez

et al. 2016

Mon. Not. R. Astron. Soc.

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The spectral resolution of a dispersive astronomical spectrograph is limited by the trade-off between throughput and the width of the entrance slit. Photonic guided-wave transitions have been proposed as a route to bypass this trade-off, by enabling the efficient reformatting of incoherent seeing-limited light collected by the telescope into a linear array of single modes: a pseudo-slit which is highly multimode in one axis but diffraction-limited in the dispersion axis of the spectrograph. It is anticipated that the size of a single-object spectrograph fed with light in this manner would be essentially independent of the telescope aperture size. A further anticipated benefit is that such spectrographs would be free of 'modal noise', a phenomenon that occurs in high-resolution multimode fibre-fed spectrographs due to the coherent nature of the telescope point-spread-function (PSF). We address these aspects by integrating a multicore fibre photonic lantern with an ultrafast laser inscribed three-dimensional waveguide interconnect to spatially reformat the modes within the PSF into a diffraction-limited pseudo-slit. Using the CANARY adaptive optics (AO) demonstrator on the William Herschel Telescope, and 1530 ± 80 nm stellar light, the device is found to exhibit a transmission of 47 -53 % depending upon the mode of AO correction applied. We also show the advantage of using AO to couple light into such a device by sampling only the core of the CANARY PSF. This result underscores the possibility that a fully-optimised guided-wave device can be used with AO to provide efficient spectroscopy at high spectral resolution.

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Section: H Y B R I D R E F O R M At T E R D E S I G Nmentioning

confidence: 99%

Efficient photonic reformatting of celestial light for diffraction-limited spectroscopy

MacLachlan

Harris

Gris-Sánchez

et al. 2016

Mon. Not. R. Astron. Soc.

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“…Glass purity is also an important fac- tor for achieving low losses. In the case of Corning Eagle2000, a multicomponent silicate glass designed for flat-panel displays, iron impurities cause 0.27 dB/cm absorption losses at 1550 nm, thereby limiting the waveguide transmission [59].…”

Section: Introductionmentioning

confidence: 99%

Ultrafast-laser-inscribed 3D integrated photonics: challenges and emerging applications

2015

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Since the discovery that tightly focused femtosecond laser pulses can induce a highly localised and permanent refractive index modification in a large number of transparent dielectrics, the technique of ultrafast laser inscription has received great attention from a wide range of applications. In particular, the capability to create three-dimensional optical waveguide circuits has opened up new opportunities for integrated photonics that would not have been possible with traditional planar fabrication techniques because it enables full access to the many degrees of freedom in a photon. This paper reviews the basic techniques and technological challenges of 3D integrated photonics fabricated using ultrafast laser inscription as well as reviews the most recent progress in the fields of astrophotonics, optical communication, quantum photonics, emulation of quantum systems, optofluidics and sensing.

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“…This technique produces low birefringence waveguides, which are required for the polarization encoding of single photons [14][15][16] , and has unique three-dimensional capabilities that enable unprecedented device layouts [17][18][19] . Using this technology for devices operating in the telecom band can add further advantages because the insertion losses of these devices in an optical fiber network are very low, due to the almost perfect mode matching and the reduced propagation losses 20,21 . The quality of photonic circuits written via femtosecond lasers has been proven by the demonstration of several classical devices in glass as waveguide amplifiers, lasers, broadband couplers, and demultiplexers [22][23][24][25] , as well as the writing of electro-optic modulators in crystals 26,27 .…”

Section: Introductionmentioning

confidence: 99%

Thermally reconfigurable quantum photonic circuits at telecom wavelength by femtosecond laser micromachining

et al. 2015

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The importance of integrated quantum photonics in the telecom band is based on the possibility of interfacing with the optical network infrastructure that was developed for classical communications. In this framework, femtosecond laser-written integrated photonic circuits, which have already been assessed for use in quantum information experiments in the 800-nm wavelength range, have great potential. In fact, these circuits, being written in glass, can be perfectly mode-matched at telecom wavelength to the in/out coupling fibers, which is a key requirement for a low-loss processing node in future quantum optical networks. In addition, for several applications, quantum photonic devices must be dynamically reconfigurable. Here, we experimentally demonstrate the high performance of femtosecond laser-written photonic circuits for use in quantum experiments in the telecom band, and we demonstrate the use of thermal shifters, which were also fabricated using the same femtosecond laser, to accurately tune such circuits. State-of-the-art manipulation of single-and two-photon states is demonstrated, with fringe visibilities greater than 95%. The results of this work open the way to the realization of reconfigurable quantum photonic circuits based on this technological platform.

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Towards low-loss lightwave circuits for non-classical optics at 800 and 1,550 nm

Cited by 51 publications

References 31 publications

Efficient photonic reformatting of celestial light for diffraction-limited spectroscopy

Efficient photonic reformatting of celestial light for diffraction-limited spectroscopy

Ultrafast-laser-inscribed 3D integrated photonics: challenges and emerging applications

Thermally reconfigurable quantum photonic circuits at telecom wavelength by femtosecond laser micromachining

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