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Tunable optofluidic microring laser based on a tapered hollow core microstructured optical fiber
Optics Express
|May 14, 2015
Summary
A tunable optofluidic laser was created in a tapered fiber using a microfluidic dye. This novel laser offers low-threshold operation and tunable emission, enabling new sensor and biomedical applications.
Area of Science:
- Optofluidics
- Microstructured Optical Fibers
- Dye Lasers
Background:
- Microstructured optical fibers offer unique light-confining properties.
- Optofluidic systems integrate fluidics and photonics for advanced functionalities.
Purpose of the Study:
- To demonstrate a tunable optofluidic microring dye laser.
- To explore the potential of tapered hollow core fibers for laser applications.
Main Methods:
- Fabrication of a tapered hollow core microstructured optical fiber.
- Filling the fiber core with a microfluidic gain medium (dye solution).
- Axial pumping with a nanosecond pulse laser at 532 nm.
Main Results:
- Achieved strong radial emission and low-threshold lasing (16 nJ/pulse).
- Lasing occurred at the surface of the microfluidic gain medium plug.
- Demonstrated tunability by adjusting the liquid surface position along the fiber taper.
Conclusions:
- A tunable optofluidic microring dye laser was successfully demonstrated.
- The developed system shows potential for liquid surface position sensing.
- Opportunities exist for applications in biomedical analysis and sensing.
