Concept of a high-resolution miniature spectrometer using an integrated filter array

Wang, Shaowei; Xia, Chao; Chen, Xiaoshuang; Lü, Wei; Li, Ming; Wang, Haiqian; Zheng, Weibo; Zhang, Tao

doi:10.1364/ol.32.000632

Cited by 187 publications

(106 citation statements)

References 19 publications

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“…It is also desirable in optical networks as a compact wavemeter. Significant progress has been made and chip-scale spectrometers have been demonstrated with various configurations, such as superprism or arrayed waveguide grating [92,93], Fabry-Perot filter array [94], microresonator array [95], etc. However, there is a fundamental tradeoff between the resolution and footprint on these dispersive components or resonance array.…”

Section: Chip-scale Optical Spectrometermentioning

confidence: 99%

High-contrast gratings for integrated optoelectronics

Chang-Hasnain¹,

Yang²

2012

Adv. Opt. Photon.

478

171

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Integrated optoelectronics has seen its rapid development in the past decade. From its original primary application in long-haul optical communications and access network, integrated optoelectronics has expanded itself to data center, consumer electronics, energy harness, environmental sensing, biological and medical imaging, industry manufacture control etc. This revolutionary progress benefits from the advancement in light generation, manipulation, detection and its interaction with other systems. Device innovation is the key in this advancement. Together they build up the component library for integrated optoelectronics, which facilities the system integration.High contrast grating (HCG) is an emerging element in integrated optoelectronics. Compared to the other elements, HCG has very rich properties and design flexibility. Some of them are fascinating and extraordinary, such as broadband high reflectivity, and high quality factor resonance -all it needs is a single thin-layer of HCG. Furthermore, it can be a microelectromechanical structure. These rich properties are readily to be harnessed and turned into novel devices.This dissertation is devoted to investigate the physical origins of the extraordinary features of HCG, and explore its applications in novel devices for integrated optoelectronics. An intuitive picture will be presented to explain the HCG physics. The essence of HCG lies in its superb manipulation of light, which can be coupled to applications in light generation and detection. Various device innovations, such as lowloss hollow-core waveguide, fast optical phased array, tunable VCSEL and detector are demonstrated with the HCG as a key element. This breadth of functionality of HCG suggests that HCG has reached beyond a single element in integrated optoelectronics; it has enabled a new platform for integrated optoelectronics.

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Section: Chip-scale Optical Spectrometermentioning

confidence: 99%

High-contrast gratings for integrated optoelectronics

Chang-Hasnain¹,

Yang²

2012

Adv. Opt. Photon.

478

171

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“…4 For free-space spectroscopy, one of the attractive designs consists of an array of on-chip narrowband band-pass optical filters placed on a photodetector array. 5 Collimated incident light beam with a broadband spectrum of interest is filtered out by the narrowband band-pass filters with different central wavelengths, and the corresponding photodetectors underneath is used to detect the power intensity of the light in the filtered spectrum, allowing to analyze the spectral information for the incident light. Such a narrowband optical filter may be implemented by using Fabry-Perot (FP) resonators formed by two highly reflective distributed Bragg reflectors (DBRs) with spatially varied cavity length so that each of the resonators has a different resonance wavelength.…”

Section: Introductionmentioning

confidence: 99%

On-chip broadband spectral filtering using planar double high-contrast grating reflectors

2015

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We propose a broadband free-space on-chip spectrometer based on an array of integrated narrowband filters consisting of Fabry-Perot resonators formed by two high-contrast grating (HCG) based reflectors separated by a low-index thin layer with a fixed cavity thickness. Using numerical simulations, broadband tunability of resonance wavelengths was achieved only by changing the in-plane grating parameters such as period or duty cycle of HCGs while the substrate geometry was kept fixed. Experimentally, the HCG reflectors were fabricated on silicon on insulator (SOI) substrates and high reflectivity was measured, fabrication process for the proposed double HCG-based narrowband filter array was developed. The filtering function that can be spanned over a wide range of wavelengths was measured.

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“…These spectrometers, built with integrated-filter arrays, provide superior portability, flexibility, and cost-effectiveness [2,3] . The spectrometers also provide fine details about the various spectral components of the incident light.…”

Section: ⅰ Introductionmentioning

confidence: 99%

“…These spectral components reveal a wealth of information concerning the composition and the structure of the various objects being observed [3] .…”

Section: ⅰ Introductionmentioning

confidence: 99%

Evaluation of Resolution Improvement Ability of a DSP Technique for Filter-Array-Based Spectrometers

Oliver

Lee

Park

et al. 2013

The Journal of Korean Institute of Communications and Informati

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In this paper, we aim to evaluate the performance of the digital signal processing (DSP) algorithm used in [8] in order to improve the resolution of spectrometers with fixed number of low-cost, non-ideal filters. In such spectrometers, the resolution is limited by the number of filters. We aim to demonstrate via new experiments that the resolution improvement by six times over the conventional limit is possible by using the DSP algorithm as claimed by [8].

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Concept of a high-resolution miniature spectrometer using an integrated filter array

Cited by 187 publications

References 19 publications

High-contrast gratings for integrated optoelectronics

High-contrast gratings for integrated optoelectronics

On-chip broadband spectral filtering using planar double high-contrast grating reflectors

Evaluation of Resolution Improvement Ability of a DSP Technique for Filter-Array-Based Spectrometers

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