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Updated: May 27, 2026

Synthesis and Operation of Fluorescent-core Microcavities for Refractometric Sensing
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Coupled optofluidic ring laser for ultrahigh-sensitive sensing.

Xingwang Zhang1, Liqiang Ren, Xiang Wu

  • 1Key Lab for Micro and Nanophotonic Structures (Ministry of Education), Department of Optical Science and Engineering, School of Information Science and Engineering, Fudan University, Shanghai 200433, China.

Optics Express
|November 24, 2011
PubMed
Summary
This summary is machine-generated.

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A novel coupled optofluidic ring laser sensor achieves ultrahigh sensitivity. This new design significantly enhances detection capabilities for refractive index changes, surpassing conventional sensors.

Area of Science:

  • Optoelectronics
  • Nanotechnology
  • Chemical Sensing

Background:

  • Ring resonator sensors are crucial for detecting changes in refractive index.
  • Existing sensors often lack the ultrahigh sensitivity required for certain applications.
  • Optofluidic integration offers potential for enhanced sensor performance.

Purpose of the Study:

  • To develop a novel active sensor structure with ultrahigh sensitivity.
  • To investigate the sensing performance of a coupled optofluidic ring laser.
  • To achieve a significant improvement in sensitivity compared to conventional sensors.

Main Methods:

  • Fabrication of a coupled optofluidic ring laser sensor.
  • Utilizing a ring laser and an integrated optofluidic tube.

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  • Monitoring the envelope shift of the modulated lasing spectrum.

    • Main Results:

    • Achieved ultrahigh sensitivity of 5930 nm/RIU.
    • Demonstrated strong modulation of emission intensity from whispering gallery resonance.
    • The sensitivity is two orders of magnitude higher than conventional ring resonator sensors.

    Conclusions:

    • The coupled optofluidic ring laser is a highly sensitive active sensor.
    • This technology offers a significant advancement for refractive index sensing.
    • Potential applications in various fields requiring ultra-sensitive detection.