Nanoimprinted Distributed Feedback Dye Laser Sensors for High Frame Rate Refractometric Imaging of Dissolution and Fluid Flow

Vannahme, Christoph; Sørensen, Kristian Tølbøl; Gade, Carsten; Hermannsson, Pétur Gordon; Dufva, Martin

doi:10.1364/sensors.2015.set3c.4

Cited by 1 publication

(1 citation statement)

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“…The larger reaction area can link more antibodies that can specifically recognize the antigen in biosensing, which can reduce the detection limit of the antigen. Others have used different active films, including dye-doped polymers [15,16,17,18] and organic semiconductors [19,20,21,22,23,24,25], for bulk and bio-detection.…”

Section: Introductionmentioning

confidence: 99%

Design for Distributed Feedback Laser Biosensors Based on the Active Grating Model

Wang

Zhou

Guo

et al. 2019

Sensors

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The distributed feedback (DFB) laser is widely used in sensing because of its portable size, simple fabrication and high sensitivity. Most theoretical design models are based on passive Bragg gratings. However, passive grating models cannot be used to predict sensor performance using the important indicator of figure of merit (FOM) through theoretical calculations. To solve this problem, we replaced the passive grating with an active grating by using the imaginary part of the coupling constant that represents the value of the gain. As a comparison, the influence of the full width at half maximum (FWHM) and sensitivity were analyzed for different grating duty cycles and depths in the passive grating sensors. To obtain a higher FOM in the active grating sensors, we systematically investigated the effects of duty cycle and gain value through numerical simulations. We found that the redshift caused by a duty cycle increase can improve the sensitivity of biomolecule detection by 1.7 times.

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