Integrated temperature sensor based on an enhanced pyroelectric photonic crystal

Lu, Hai; Sadani, Benattou; Ulliac, Gwenn; Guyot, Clément; Courjal, Nadège; Collet, Manuel; Baida, Fadi; Bernal, Maria–Pilar

doi:10.1364/oe.21.016311

Cited by 51 publications

(17 citation statements)

References 27 publications

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“…Such a technique removes the requirement of an extra phase modulation component such as an EOM or AOM, thus facilitating the application and packaging of the thermometer. It should be noted that with engineering of the resonator geometry and the electrodes the sensitivity of the thermometer could be enhanced by the pyroelectric effect [16] as has been recently observed in LN WGMRs [36]. With this enhanced sensitivity and improved laser locking stability it would suggest that the fundamental-thermal-noise-limited-detectivity may be reached.…”

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confidence: 88%

“…With the same noise floor the detection limit is inversely proportional to the sensitivity, therefore a large sensitivity allows for better resolution of thermometry. While extremely high sensitivities have been demonstrated in a variety of optical thermometers [13][14][15][16][17], the previously reported sensitivities of CaF 2 and MgF 2 WGMR-based dual-mode thermometers only reached ∼ 80 − 500 MHz/K [9][10][11]. In this work, we use a millimetersize lithium niobate (LN) WGMR as the birefringent resonator in a dual-polarization thermometry technique.…”

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confidence: 99%

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Ultra-sensitive lithium niobate thermometer based on a dual-resonant whispering-gallery-mode cavity

2018

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We exploit the strong polarization dependence of the thermooptic coefficients in a lithium niobate whispering-gallery-mode resonator to create a self-referenced thermometer. An unprecedented temperature sensitivity of 3.0 GHz/K in the frequency difference between modes of orthogonal polarizations is demonstrated. In order to lock the lasers to the mode resonances, we use a simple intracavity phase modulation approach that provides for superbly low frequency instability. We demonstrate a record room-temperature thermometer detectivity of 40 nK with 1 s of averaging time. Simulations based on the fluctuation-dissipation theorem are performed to calculate the fundamental thermorefractive noise, showing that the detectivity could be improved with reduced laser-locking instabilities.

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confidence: 88%

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confidence: 99%

Ultra-sensitive lithium niobate thermometer based on a dual-resonant whispering-gallery-mode cavity

2018

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“…Moreover, label-free and real-time monitoring can also be realized. Integrated photonic RI sensors are normally based on the evanescent tail of waveguide modes and various structures have been demonstrated such as Mach-Zehnder interferometers (MZIs) [3], Young interferometers [4], microring resonators [5]- [7], photonic crystals [8], [9] and plasmonic structures [10], [11]. Interferometer RI sensors which have been studied from the beginning still stay vigorous due to the advantages such as high sensitivity and small limit of detection (LOD) [12].…”

Section: Introductionmentioning

confidence: 99%

Bimodal Waveguide Interferometer RI Sensor Fabricated on Low-Cost Polymer Platform

Liang

Zhao

et al. 2019

IEEE Photonics J.

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A refractive index sensor based on bimodal waveguide interferometer is demonstrated on the low-cost polymer platform for the first time. Different from conventional interferometers which make use of the interference between the light from two arms, bimodal waveguide interferometers utilize the interference between the two different internal modes in the waveguide. Since the utilized first higher mode has a wide evanescent tail which interacts with the external environment, the interferometer can reach a high sensitivity. Instead of vertical bimodal structure which is normally employed, the lateral bimodal waveguide is adopted in order to simplify the fabrication process. A unique offset between the centers of single mode waveguide and bimodal waveguide is designed to excite the two different modes with equal power which contributes to the maximum fringe visibility. The bimodal waveguide interferometer is finally fabricated on optical polymer (Ormocore) which is transparent at both infrared and visible wavelengths. It is fabricated using the UV-based soft imprint technique which is simple and reproductive. The bulk sensitivity of fabricated interferometer sensor with a 5 mm sensing length is characterized using different mass concentration sodium chloride solutions. The sensitivity is obtained as 316π rad/RIU and the extinction ratio can reach 18 dB.

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“…In particular, lithium niobate has a larger electro-optic coefficient and nonlinear optical properties. As a result, many specific devices, such as electric field sensors [16,17], modulators [18][19][20][21], optical wavelength converter [22,23] and resonators [24,25], were fabricated with LN material. The most popular and conventional methods to fabricate an optical waveguide on a LN substrate are ion-doping methods such as Ti (titanium) indiffusion or annealed proton exchange (APE).…”

Section: Introductionmentioning

confidence: 99%

Add-Drop Filter Based on Wavelength-Dependent Light Interlink between Lithium-Niobate Microwaveguide Chip and Microfiber Knot Ring

Zhou

Wang

et al. 2016

Crystals

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Abstract:In this paper, we experimentally demonstrate an add-drop filter based on wavelengthdependent light coupling between a lithium-niobate (LN) microwaveguide chip and a microfiber knot ring (MKR). The MKR was fabricated from a standard single-mode fiber, and the LN microwaveguide chip works as a robust substrate to support the MKR. The guided light can be transmitted through add and drop functionality and the behaviors of the add-drop filter can be clearly observed. Furthermore, its performance dependence on the MKR diameter is also studied experimentally. The approach, using a LN microwaveguide chip as a platform to couple and integrate the MKR, may enable us to realize an optical interlink between the microstructured chip and the micro/nano fiber-optic device.

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Integrated temperature sensor based on an enhanced pyroelectric photonic crystal

Cited by 51 publications

References 27 publications

Ultra-sensitive lithium niobate thermometer based on a dual-resonant whispering-gallery-mode cavity

Ultra-sensitive lithium niobate thermometer based on a dual-resonant whispering-gallery-mode cavity

Bimodal Waveguide Interferometer RI Sensor Fabricated on Low-Cost Polymer Platform

Add-Drop Filter Based on Wavelength-Dependent Light Interlink between Lithium-Niobate Microwaveguide Chip and Microfiber Knot Ring

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