Fast FBG Interrogator on Chip Based on Silicon on Insulator Ring Resonator Add/Drop Filters

Tozzetti, Lorenzo; Bontempi, F.; Giacobbe, Anna; Pasquale, F. Di; Faralli, S.

doi:10.1109/jlt.2022.3174770

Cited by 8 publications

(4 citation statements)

References 29 publications

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“…The general problem with intensity interrogation is the need for a broadband optical source [ 26 ] or a cascade of narrow-band sources [ 6 ], which complicates the integrated implementation of the interrogator and increases its cost. Thus, it is crucial to consider how to obtain a feeding optical signal on a PIC and how to reduce its influence on the sensing system characteristics.…”

Section: Pic-based Sensing System Concept and Operation Principlementioning

confidence: 99%

“…For the practical application of optical sensors, indirect methods have been developed to analyze the optical emission spectrum for high-speed interrogation with high resolution [ 25 ]. Depending on the analyzed parameters of the output electrical signal, three methods of interrogation are distinguished: by intensity, when the photocurrent power is measured [ 26 ]; by frequency, when the frequency of the signal at the output of the photodetector is estimated [ 27 , 28 ]; and by time, when the shape of the output signal envelope is analyzed [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

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Design and Modeling of a Fully Integrated Microring-Based Photonic Sensing System for Liquid Refractometry

Voronkov

Zakoyan

Ivanov

et al. 2022

Sensors

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The design of a refractometric sensing system for liquids analysis with a sensor and the scheme for its intensity interrogation combined on a single photonic integrated circuit (PIC) is proposed. A racetrack microring resonator with a channel for the analyzed liquid formed on the top is used as a sensor, and another microring resonator with a lower Q-factor is utilized to detect the change in the resonant wavelength of the sensor. As a measurement result, the optical power at its drop port is detected in comparison with the sum of the powers at the through and drop ports. Simulations showed the possibility of registering a change in the analyte refractive index with a sensitivity of 110 nm per refractive index unit. The proposed scheme was analyzed with a broadband source, as well as a source based on an optoelectronic oscillator using an optical phase modulator. The second case showed the fundamental possibility of implementing an intensity interrogator on a PIC using an external typical single-mode laser as a source. Meanwhile, additional simulations demonstrated an increased system sensitivity compared to the conventional interrogation scheme with a broadband or tunable light source. The proposed approach provides the opportunity to increase the integration level of a sensing device, significantly reducing its cost, power consumption, and dimensions.

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Section: Pic-based Sensing System Concept and Operation Principlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and Modeling of a Fully Integrated Microring-Based Photonic Sensing System for Liquid Refractometry

Voronkov

Zakoyan

Ivanov

et al. 2022

Sensors

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“…Another method is to use micro-ring resonators, which are easy to integrate in silicon photonics, and are also easy to tune with integrated heaters. The wavelength can be extracted passively by tuning the ring to the FBG maximum slope, as in [7], or by actively sweeping or dithering the ring along a wider range, as in [8,9]. The main drawback of using ring resonators is the freespectral range (FSR), which is limited to 20-30 nm, and their tunability range, which is also limited by a similar amount.…”

Section: Introductionmentioning

confidence: 99%

Ultracompact Microinterferometer-Based Fiber Bragg Grating Interrogator on a Silicon Chip

Elaskar

Bontempi

Velha

et al. 2023

J. Lightwave Technol.

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We report an interferometer-based multiplexed fiber Bragg grating (FBG) interrogator using silicon photonic technology. The photonic-integrated system includes the grating coupler, active and passive interferometers, a 12-channel wavelength-division-multiplexing (WDM) filter, and Ge photodiodes, all integrated on a 6x8 mm 2 silicon chip. The system also includes optical and electric interfaces to a printed board, which is connected to a real-time electronic board that actively performs the phase demodulation processing using a multitone mixing (MTM) technique. The device with active demodulation, which uses thermally-based phase shifters, features a noise figure of σ = 0.13 pm at a bandwidth of 700 Hz, which corresponds to a dynamic spectral resolution of 4.9 fm/Hz 1/2 . On the other hand, the passive version of the system, based on a 90º-hybrid coupler, features a noise figure of σ = 2.55 pm at a bandwidth of 10 kHz, also showing successful detection of a 42 kHz signal when setting the bandwidth to 50 kHz. These results demonstrate the advantage of integrated photonics, which allows the integration of several systems with different demodulation schemes in the same chip and guarantees easy scalability to a higher number of ports without increasing the dimensions or the cost.

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“…Currently, the main tasks in developing MRR-based sensors are to increase their sensitivity and quality factor, as well as methods for their interrogation. Three methods of scanning liquid sensors based on MRR are usually considered: interrogation by intensity [11,12], frequency [13], and time [14].…”

Section: Introductionmentioning

confidence: 99%

Design and simulation of a multichannel sensing system for liquid refractometry based on integrated photonics

Zakoyan,

Voronkov,

Lyubopytov

et al. 2023

Computer Optics

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The paper proposes a new architecture for the photonic laboratory-on-a-chip sensing systems, where multiple sensors based on microring resonators (MRR) are fed by a MRR with low quality factor, working as a spectrum shaper. This architecture enables simultaneous intensity scanning of at least four MRR-based sensors on the silicon-on-insulator platform. We evaluated numerically the system’s sensitivity for various schemes of connecting the sensors and the spectrum shaper. The sensor’s sensitivity was 110 nm/RIU. The sensing system configuration largely determines its sensitivity, which reaches 1980 dB/RIU. The considered architecture may be useful for implementing fully integrated optical lab-on-a-chip structures, as well as distributed multichannel sensing systems.

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Fast FBG Interrogator on Chip Based on Silicon on Insulator Ring Resonator Add/Drop Filters

Cited by 8 publications

References 29 publications

Design and Modeling of a Fully Integrated Microring-Based Photonic Sensing System for Liquid Refractometry

Design and Modeling of a Fully Integrated Microring-Based Photonic Sensing System for Liquid Refractometry

Ultracompact Microinterferometer-Based Fiber Bragg Grating Interrogator on a Silicon Chip

Design and simulation of a multichannel sensing system for liquid refractometry based on integrated photonics

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