Chip-scale, full-Stokes polarimeter

Lin, Zhongjin; Rusch, Leslie A.; Chen, Yuxuan; Shi, Wei

doi:10.1364/oe.27.004867

Cited by 36 publications

(21 citation statements)

References 25 publications

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“…The birefringence and dichroism of a material can be determined by measuring changes in the polarisation of light passing through the material, by so-called polarimetry measurements [16][17][18][19]. Polarimetry is a relatively easy technique to implement -at its most simple, requiring only: a light source (laser), polarising filters (and quarter wave plate for circular birefringence and dichroism measurements), and a detector [20,21]. To achieve greater sensitivity of measurements, one can employ interferometric techniques.…”

Section: Introductionmentioning

confidence: 99%

3D Mueller Matrix Reconstruction of the Optical Anisotropy Parameters of Myocardial Histopathology Tissue Samples

et al. 2021

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Diseases affecting myocardial tissues are currently a leading cause of death in developed nations. Fast and reliable techniques for analysing and understanding how tissues are affected by disease and respond to treatment are fundamental to combating the effects of heart disease. A 3D Mueller matrix method that reconstructs the linear and circular birefringence and dichroism parameters has been developed to image the biological structures in myocardial tissues. The required optical data is gathered using a Stokes polarimeter and then processed mathematically to recover the individual optical anisotropy parameters, expanding on existing 2D Mueller matrix implementations by combining with a digital holography approach. Changes in the different optical anisotropy parameters are rationalised with reference to the general tissue structure, such that the structures can be identified from the anisotropy distributions. The first to fourth order statistical moments characterising the distribution of the parameters of the optical anisotropy of the polycrystalline structure of the partially depolarising layer of tissues in different phase sections of their volumes are investigated and analysed. The third and fourth order statistical moments are found to be the most sensitive to changes in the phase and amplitude anisotropy. The possibility of forensic medical differentiation of death in cases of acute coronary insufficiency (ACI) and coronary heart disease (CHD) is considered as a diagnostic application. The optimal phase plane (θ∗=0.7rad) has been found, in which excellent differentiation accuracy is achieved ACI and CHD -Ac(ΔZ4(θ∗,ΦL,ΔL))=93.05%÷95.8%. A comparative analysis of the accuracy of the Mueller-matrix reconstruction of the parameters of the optical anisotropy of the myocardium in different phase planes (θ=0.9rad and θ=1.2rad), as well as the 2D Mueller-matrix reconstruction method was carried out. This work demonstrates that a 3D Mueller matrix method can be used to effectively analyse the optical anisotropy parameters of myocardial tissues with potential for definitive diagnostics in forensic medicine.

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Section: Introductionmentioning

confidence: 99%

3D Mueller Matrix Reconstruction of the Optical Anisotropy Parameters of Myocardial Histopathology Tissue Samples

et al. 2021

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“…The distinct optical response of plasmonic chiral metamaterials to left-handed (LCP) and right-handed (RCP) circularly polarized light has been exploited to realize circular polarizers 10,[14][15][16][17] . Despite the relative ease with which these structures can be merged with standard electronics 14 , they are limited by low circular polarization extinction ratios and low optical efficiency 10 due to the losses of the parasitic currents generated in the nanoinclusions 18 . Regarding the compactness of the device, a major drawback of these structures is the requirement of off-chip detector to sense the scattered light 18 .…”

Section: Introductionmentioning

confidence: 99%

Polarization sensitive photodectector based on GaAsN

Ibarra-Sierra,

Sandoval-Santana,

Joshya

et al. 2021

Preprint

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We propose and numerically simulate an optoelectronic compact circular polarimeter. It allows to electrically measure the degree of circular polarization and light intensity at room temperature for a wide range of incidence angles in a single shot. The device, being based on GaAsN, is easy to integrate into standard electronics and does not require bulky movable parts nor extra detectors. Its operation hinges mainly on two phenomena: the spin dependent capture of electrons and the hyperfine interaction between bound electrons and nuclei on Ga 2+ paramagnetic centers in GaAsN. The first phenomenon confers the device with sensitivity to the degree of circular polarization and the latter allows to discriminate the handedness of the incident light.

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“…In recent years, photonic integrated circuits (PICs) has attracted more and more attentions because of the increasing demand of signal bandwidth and message transmission rate. Optical power splitter (OPS) is one of the basic elements in PICs and has been used in plenty of fields, such as signal detection [1], signal feedback [2], filter [3], [4], power distribution [5], [6], and so on. Although the uniform OPS has been researched comprehensively and well-thought-out, non-uniform OPS, or tunable OPS is needed in some specific application scenarios which require unequal power splitting ratio (PSR), such as: power equalizers [7], ring lasers [8], [9], optical switch [10] and modulators [11].…”

Section: Introductionmentioning

confidence: 99%

Integrated Optical Power Splitter With Continuously Adjustable Power Splitting Ratio

et al. 2020

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Optical power splitter (OPS) as one of the basic elements in photonic integrated circuits (PIC) is widely used in many fields. The OPS with continuously adjustable power splitting ratio (PSR) can improve the flexibility of PIC and also simplify the PIC system. We propose and demonstrate an integrated OPS based on silicon-on-insulator. Our scheme combines several common structures such as 2 × 2 multimode interference coupler, waveguide grating and slot. The PSR of the OPS can be continuously adjustable by tuning the wavelength of the input signal or the voltages applied to the electrodes on the chip. The maximum tunable range of the PSR is from 28.2 dB to −1.7 dB when no voltages are applied to the electrodes and the wavelength of the input signal varies from 1542.62 nm to 1547.94 nm. And the maximum and minimum tunable ranges of the PSR are 35 dB and 0.4 dB, respectively, when the power consumption of the micro-heaters varies from 0 to 27 mW. So, our OPS can be both temperature-sensitive and temperature-insensitive. Our scheme has the advantages of compact structure and high flexibility, and it can be widely used in optical switching, signal channel division and power distribution.

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Chip-scale, full-Stokes polarimeter

Cited by 36 publications

References 25 publications

3D Mueller Matrix Reconstruction of the Optical Anisotropy Parameters of Myocardial Histopathology Tissue Samples

3D Mueller Matrix Reconstruction of the Optical Anisotropy Parameters of Myocardial Histopathology Tissue Samples

Polarization sensitive photodectector based on GaAsN

Integrated Optical Power Splitter With Continuously Adjustable Power Splitting Ratio

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