A general approach for robust integrated polarization rotators

Alonso-Ramos, C.; Halir, Robert; Ortega‐Moñux, Alejandro; Cheben, Pavel; Vivien, Laurent; Molina-Fernández, Í.; Marris‐Morini, Delphine; Janz, Siegfried; Xu, Dan‐Xia; Schmid, Jens H.

doi:10.1117/12.2016845

Cited by 4 publications

(8 citation statements)

References 15 publications

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“…A common characteristic of the previously described GC structures is that the etch depth (e) is the same along the whole grating; thus, a single etch step is sufficient to define all the grating trenches in the Si waveguide. An alternative approach to enhance the CE of the gratings is to design more complex grating structures, including multiple etch depths in a single grating [77][78][79][80][81]. In [77], for example, a uniform SOI grating implemented with a double-level etch was proposed and analyzed from an antenna theory point of view.…”

Section: Multiple Etch-depth Grating Couplersmentioning

confidence: 99%

Coupling strategies for silicon photonics integrated chips [Invited]

Marchetti¹,

Lacava²,

Carroll³

et al. 2019

Photon. Res.

398

206

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Over the last 20 years, silicon photonics has revolutionized the field of integrated optics, providing a novel and powerful platform to build mass-producible optical circuits. One of the most attractive aspects of silicon photonics is its ability to provide extremely small optical components, whose typical dimensions are an order of magnitude smaller than those of optical fiber devices. This dimension difference makes the design of fiberto-chip interfaces challenging and, over the years, has stimulated considerable technical and research efforts in the field. Fiber-to-silicon photonic chip interfaces can be broadly divided into two principle categories: in-plane and out-of-plane couplers. Devices falling into the first category typically offer relatively high coupling efficiency, broad coupling bandwidth (in wavelength), and low polarization dependence but require relatively complex fabrication and assembly procedures that are not directly compatible with wafer-scale testing. Conversely, out-of-plane coupling devices offer lower efficiency, narrower bandwidth, and are usually polarization dependent. However, they are often more compatible with high-volume fabrication and packaging processes and allow for on-wafer access to any part of the optical circuit. In this paper, we review the current state-of-the-art of optical couplers for photonic integrated circuits, aiming to give to the reader a comprehensive and broad view of the field, identifying advantages and disadvantages of each solution. As fiber-to-chip couplers are inherently related to packaging technologies and the co-design of optical packages has become essential, we also review the main solutions currently used to package and assemble optical fibers with silicon-photonic integrated circuits.

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Section: Multiple Etch-depth Grating Couplersmentioning

confidence: 99%

Coupling strategies for silicon photonics integrated chips [Invited]

Marchetti¹,

Lacava²,

Carroll³

et al. 2019

Photon. Res.

398

206

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show abstract

“…Each TPPS will tune the polarization phase in order to feed the PRs with the suitable polarization phase so that, at the output of the third PR (point F), the desired PER is achieved. The last TPPS then produces the appropriate polarization phase shift so that the desired SOP is obtained at the output (point G) [9,15].…”

Section: Device Operationmentioning

confidence: 99%

“…A polarization controller is composed of two main elements: polarization rotators (PRs) (or wave plates) with precisely controlled rotation angles and polarization phase shifters. While the latter can be implemented with judiciously designed waveguide heaters, the former require either specialized fabrication processes and materials [7,8] or extremely tight fabrication tolerances on the order of a few nanometers [9]. Indeed, the polarization controllers proposed in [10,11], which rely on precise PRs, have been experimentally demonstrated only with a hybrid integration approach.…”

Section: Introductionmentioning

confidence: 99%

“…Our design yields a PER range of ∼40 dB, which is, furthermore, tunable in the full C-band. This is achieved by using three polarization-rotating elements, as first proposed for PRs in [9], combined with polarization phase shifters. The key advantage of our scheme is that the polarization phase shifters both compensate fabrication deviations in the PRs and enable wavelength tuning over a range of at least 40 nm.…”

Section: Introductionmentioning

confidence: 99%

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Demonstration of integrated polarization control with a 40 dB range in extinction ratio

Sarmiento-Merenguel

Halir

Roux

et al. 2015

Optica

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Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Demonstration of integrated polarization control with a 40 dB range in extinction ratio Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1364/OPTICA.2.001019 Optica, 2, 12, pp. 1019Optica, 2, 12, pp. -1023Optica, 2, 12, pp. , 2015 Demonstration of integrated polarization control with a 40 dB range in extinction ratio Polarization controllers are key elements in many fields of optics, including coherent communications, optical imaging, and quantum applications. Here we present a technology-independent polarization controller scheme based on electrically tunable phase shifters and polarization rotators with largely relaxed fabrication tolerances. Using this scheme, we experimentally demonstrate a fully integrated polarization controller in the silicon-on-insulator platform that is tunable over the complete C-band and achieves a polarization extinction range of 40 dB (20 dB). These results constitute, to the best of our knowledge, the highest polarization extinction range achieved in a fully integrated device, and overcome the existing limitation in the trade-off between integration and performance in polarization management circuits.

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“…Research has been performed on finding tolerant designs for different integrated photonic devices [6]- [11]. Similarly, the adverse effects of fabrication variations on the performance of microrings has been exhibited in [12].…”

Section: Introductionmentioning

confidence: 99%

System Robust Optimization of Ring Resonator-Based Optical Filters

Rehman

Langelaar

2016

J. Lightwave Technol.

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Fabrication variations can have a detrimental effect on the performance of optical filters based on ring resonators. However, by using robust optimization these effects can be minimized and device yield can be significantly improved. This paper presents an efficient robust optimization technique for designing manufacturable optical filters based on serial ring resonators. The serial ring resonator is treated as a system which has computationally expensive (directional coupler section) and cheap components (ring section). Cheap mathematical models are constructed of the directional coupler sections in the resonators. The approximate system response based on the cheap model is then robustly optimized. The robust bandpass filter performance is compared against designs that do not take uncertainties into account. The optimality of the robust solutions is confirmed by simulating it on the expensive physical model as a post-processing step. Results indicatethat the employed approach can provide an efficient means for robust optimization of ring resonator-based optical filters.

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A general approach for robust integrated polarization rotators

Cited by 4 publications

References 15 publications

Coupling strategies for silicon photonics integrated chips [Invited]

Coupling strategies for silicon photonics integrated chips [Invited]

Demonstration of integrated polarization control with a 40 dB range in extinction ratio

System Robust Optimization of Ring Resonator-Based Optical Filters

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