Potential applications of ring resonators for astronomical instrumentation

Ellis, S. C.; Crouzier, Antoine; Bland-Hawthorn, Joss; Lawrence, Jon; Kepple, J.

doi:10.1117/12.925804

Cited by 16 publications

(23 citation statements)

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“…The result obtained in the reduction of the simulated OH transmission profile was of a factor of 4 (6.8 dB), which is much smaller than the factor of 1000 (30 dB) obtained by the GNOSIS instrument which suppresses 103 OH doublets between 1.47 and 1.7 µm (Ellis et al 2012). However, it is important to emphasize that in this experiment a commercial Bragg grating was used, and the spectral response obtained for the transmission profile was enough to highlight the viability of this technique.…”

Section: Analysis Of Resultsmentioning

confidence: 63%

“…This solution has proved to be very successful to reduce 103 OH emission lines doublets in the 1.47 − 1.7µm band by a factor of ≈1,000 using seven 50 µm core fibers connected to 19 single mode fibers with two sets of AFBGs each (GNOSIS instrument). However, the results were not as successful as expected in the reduction of the background between the OH lines (Ellis et al 2012;Trinh et al 2013). Despite the success of the above technique of OH emission lines reduction, we believe that it can be further improved.…”

Section: Introductionmentioning

confidence: 76%

“…The astrophotonics solution for OH suppression at NIR wavelengths consists of the use of two innovations: aperiodic fiber Bragg gratings (AFBGs) and photonic lanterns (Ellis & Bland-Hawthorn 2008;Bland-Hawthorn et al 2004;Ellis et al 2012;Trinh et al 2013;Trinh 2013;León-Saval et al 2005;Birks et al 2015). AFBGs have the capability to behave as complex multi-notch filters that can suppress hundreds of OH emission lines in the 1,000 to 1,800 nm band at high attenuation (≈ 30dB in transmission) over a large bandpass ( 200 nm), with low attenuation between the lines (< 0.2dB) and a narrow wavelength interval [δλ = 0.16nm] (Bland-Hawthorn et al 2011).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A New Method for Actively Tuning Fbg's to Particular Infrared Wavelengths for Oh Emission Lines Suppression

Benítez-Álvarez

Martínez-Piñón

Orlov

2019

RMxAA

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This paper presents the conceptual design for a new method for the suppression of OH emission lines at near-infrared (NIR) wavelengths by actively adjusting the aperiodic fiber optic Bragg gratings tension. First, we prepared an experimental study in which we simulated an OH emission line using a semiconductor laser at 1548.43 nm and a commercial FBG, with a Bragg wavelength of 1547.76 nm. We demonstrated that the grating Bragg wavelength can be adjusted by controlling the linear deformation of the fiber with a force in the range of 0 to 53.88 gf (0.528 N) that provides a sensitivity of 0.014 nm g −1 . Second, we proposed the design of a system connected to the telescope instrumentation, with the different stages that would allow monitoring the suppression of emission lines.

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Section: Analysis Of Resultsmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A New Method for Actively Tuning Fbg's to Particular Infrared Wavelengths for Oh Emission Lines Suppression

Benítez-Álvarez

Martínez-Piñón

Orlov

2019

RMxAA

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“…The astronomical requirements of ring resonators have been investigated by Ellis et al 69 The development of ring resonators for astronomy is still in its infancy and there are several challenges to be met. For example, each ring resonator produces a spectrum of resonant wavelengths, which will lead to unwanted notches unless the free spectral range is large enough (up to hundreds of nm for OH suppression).…”

Section: Ring Resonatorsmentioning

confidence: 99%

Speciality optical fibres for astronomy

Ellis

Bland-Hawthorn

2015

Micro-Structured and Specialty Optical Fibres IV

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Astrophotonics is a rapidly developing area of research which applies photonic technology to astronomical instrumentation. Such technology has the capability of significantly improving the sensitivity, calibration and stability of astronomical instruments, or indeed providing novel capabilities which are not possible using classical optics. We review the development and application of speciality fibres for astronomy, including multi-mode to single-mode converters, notch filters and frequency combs.In particular we focus on our development of instruments designed to filter atmospheric emission lines to enable much deeper spectroscopic observations in the near-infrared. These instruments employ two novel photonic technologies. First, we have developed complex aperiodic fibre Bragg gratings which filter over 100 irregularly spaced wavelengths in a single device, covering a bandwidth of over 200 nm. However, astronomical instruments require highly multi-mode fibres to enable sufficient coupling into the fibre, since atmospheric turbulence heavily distorts the wavefront. But photonic technologies such as fibre Bragg gratings, require single mode fibres. This problem is solved by the photonic lantern, which enables efficient coupling from a multi-mode fibre to an array of single-mode fibres and vice versa.We present the results of laboratory tests of these technologies and of on-sky experiments made using the first instruments to deploy these technologies on a telescope. These tests show that the fibre Bragg gratings suppress the night sky background by a factor of 9. Current instruments are limited by thermal and detector emission. Planned instruments should improved the background suppression even further, by optimising the design of the spectrograph for the properties of the photonic components.Finally we review ongoing research in astrophotonics, including multi-moded multicore fibre Bragg gratings, which enable multiple gratings to be written into the same device simultaneously, femtosecond direct-write photonic lanterns and Bragg gratings, and complex notch filters and frequency combs using microring resonators, and plans for future astrophotonic instrumentation.

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“…Given the enormous usage of optical systems in safety-critical applications, ranging from astronomy 6 to the refractive index measurement of cancer cells, 7 their precise analysis is a dire need. Therefore, we propose a higher-order-logic theorem proving based framework for the accurate analysis of electromagnetic theory based optical system models.…”

Section: Introductionmentioning

confidence: 99%

Formal analysis of electromagnetic optics

Khan-Afshar¹,

Hasan²,

Tahar³

2014

SPIE Proceedings

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Optical systems are increasingly being used in safety-critical applications. Due to the complexity and sensitivity of optical systems, their verification raises many challenges for engineers. Traditionally, the analysis of such systems has been carried out by paper-and-pencil based proofs and numerical computations. However, these techniques cannot provide accurate results due to the risk of human error and inherent approximations of numerical algorithms. In order to overcome these limitations, we propose to use theorem proving (i.e., a computer-based technique that allows to express mathematical expressions and reason about their correctness by taking into account all the details of mathematical reasoning) as a complementary approach to improve optical system analysis. This paper provides a higher-order logic (a language used to express mathematical theories) formalization of electromagnetic optics in the HOL Light theorem prover. In order to demonstrate the practical effectiveness of our approach, we present the analysis of resonant cavity enhanced photonic devices.

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Potential applications of ring resonators for astronomical instrumentation

Cited by 16 publications

References 0 publications

A New Method for Actively Tuning Fbg's to Particular Infrared Wavelengths for Oh Emission Lines Suppression

A New Method for Actively Tuning Fbg's to Particular Infrared Wavelengths for Oh Emission Lines Suppression

Speciality optical fibres for astronomy

Formal analysis of electromagnetic optics

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