Journal ArticleDOI
Integrated Optical Rectangular-Edge Filter Devices in SOI
Parimal Sah,Bijoy Krishna Das +1 more
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TLDR
In this paper, an integrated optical design of a rectangular-edge filter device in 250-nm silicon-on-insulator platform is proposed and demonstrated experimentally, where the device is designed with a multimode waveguide with asymmetric side-wall grating, which is adiabatically interfaced with input/output single-mode waveguides.Abstract:
An integrated optical design of a rectangular-edge filter device in 250-nm silicon-on-insulator platform is proposed and demonstrated experimentally. The device is designed with a multimode waveguide (supporting at least two modes) with asymmetric side-wall grating, which is adiabatically interfaced with input/output single-mode waveguides. The input/output access waveguides are terminated with grating couplers for optical characterizations. Design parameters are optimized for a sharp-edge or nearly rectangular-edge filter response in optical C-band (1530 nm $\leq \lambda _{\text{edge}} \leq $ 1565 nm). The submicron features and the entire footprint of the devices were defined with a single-step e-beam lithography process by using negative-tone resist and subsequent dry etching of $\sim$ 100 nm by using an inductively coupled reactive ion etching system. All the fabricated devices exhibit a rectangular-edge filter response at $\lambda _{\text{edge}} \sim $ 1560 nm with an edge-extinction of $>$ 40 dB at the rate of 118 dB/nm. The rectangular-edge is followed by a broad pass-band of $\sim $ 40 nm till the first-order Bragg reflected wavelength of $\lambda _B^{00} \sim $ 1600 nm in the transmission characteristics obtained for 1520 nm $\leq \lambda \leq$ 1620 nm. Tunability of a rectangular-edge filter is verified with cladding refractive index change and the observed refractive index sensitivity of the edge is $\sim$ 18 nm/RIU. The limit of detection for 1-dB transmitted power extinction at $\lambda _{\text{edge}}$ of a typical fabricated device is estimated to be 5.3 $\times\, \text{10}^{-4}$ RIU.read more
Citations
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Journal ArticleDOI
Optical MEMS accelerometer sensor relying on a micro-ring resonator and an elliptical disk
TL;DR: The achieved functional characteristics of the proposed accelerometer are compared to several recent contributions in the related field and can be a suitable device for many applications ranging from consumer electronics to inertial measurement units.
Journal ArticleDOI
Thermally Stable Optical Filtering Using Silicon-Based Comb-Like Asymmetric Grating for Sensing Applications
Sourabh Jain,Sulabh Srivastava,Swati Rajput,Lalit Singh,Pragya Tiwari,A. K. Srivastava,Mukesh Kumar +6 more
TL;DR: In this paper, a silicon-based compact comb-like asymmetric grating is proposed as a thermally stable optical filter for label-free sensing applications, which allows a single narrow passband transmission peak with a large Free Spectral Range (FSR) attributed to the engineered photonic bandgap of two modes present in the waveguide region.
Journal ArticleDOI
Design of grating based narrow band reflector on SOI waveguide
Tarun Sharma,Tarun Sharma,Vaibhav Rana,Jiaqi Wang,Zhenzhou Cheng,Zhenzhou Cheng,Zhenzhou Cheng,Yuzhi Chen,Youfu Geng,Xueming Hong,Xuejin Li,Kyoungsik Yu,Brajesh Kumar Kaushik +12 more
TL;DR: In this paper, a grating-based narrowband wavelength selective reflector on silicon on insulator waveguide is proposed, which consists of dual-etch layers for different grating sets separated by the center cavity.
Journal ArticleDOI
Investigation of backward cladding-mode coupling in Bragg gratings implemented on a Si3N4 waveguide platform
TL;DR: In this paper, experimental and simulation results of sidewall Bragg gratings (BGs) implemented on a silicon nitride waveguide platform, with emphasis on the appreciable drop of transmission on the high-frequency side of the grating stopband due to the coupling into backward cladding/radiative modes.
Journal ArticleDOI
Integrated Optical Linear Edge Filters Using Apodized Sub-Wavelength Grating Waveguides in SOI
TL;DR: In this article, an integrated optical apodized subwavelength grating waveguide is designed and demonstrated exhibiting high-extinction edge-filter characteristics with a linear rolloff in the dB scale.
References
More filters
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Silicon optical modulators
TL;DR: The techniques that have, and will, be used to implement silicon optical modulators, as well as the outlook for these devices, and the candidate solutions of the future are discussed.
Journal ArticleDOI
Roadmap on silicon photonics
David J. Thomson,Aaron Zilkie,John E. Bowers,Tin Komljenovic,Graham T. Reed,Laurent Vivien,Delphine Marris-Morini,Eric Cassan,Léopold Virot,Jean-Marc Fedeli,J. M. Hartmann,Jens H. Schmid,Dan-Xia Xu,Frederic Boeuf,Peter O'Brien,Goran Z. Mashanovich,Milos Nedeljkovic +16 more
TL;DR: In this article, the authors provide an overview and outlook for the silicon waveguide platform, optical sources, optical modulators, photodetectors, integration approaches, packaging, applications of silicon photonics and approaches required to satisfy applications at mid-infrared wavelengths.
Journal ArticleDOI
Compact efficient broadband grating coupler for silicon-on-insulator waveguides.
TL;DR: A high-efficiency broadband grating coupler for coupling between silicon-on-insulator (SOI) waveguides and optical fibers and the size of the grooves is optimized numerically.
Journal ArticleDOI
Photonic signal processing of microwave signals
TL;DR: In this paper, several photonic signal processors, including high-resolution microwave filters, widely tunable filters, arbitrary waveform generators, and fast signal correlators, are discussed, and a new concept for realizing multiple-tap coherence-free processor filters, based on a new frequencyshifting technique, is presented.
Journal ArticleDOI
Silicon nanostructure cloak operating at optical frequencies
TL;DR: In this paper, a triangular array of silicon nanostructures is experimentally demonstrated to function as an optical cloaking device, operating in the near-infrared at a wavelength of 1550-nm.