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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

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Published on: August 5, 2013

Tailoring Whispering Gallery Lasing and Random Lasing in A Compound Cavity.

Zhiyang Xu¹, Junhua Tong¹, Xiaoyu Shi¹

¹College of Applied Sciences, Beijing University of Technology, Beijing 100124, China.

|March 19, 2020

Summary

Researchers developed a novel compound cavity for whispering gallery mode (WGM) and random lasing. This polymer laser device shows tunable performance, offering new possibilities for integrated light sources in sensing applications.

Keywords:

compound cavity polymer laser random laser whispering gallery mode

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Area of Science:

Optics and Photonics
Materials Science
Nanotechnology

Background:

Whispering gallery mode (WGM) lasers and random lasers offer unique optical properties.
Integrating different lasing mechanisms into a single device is challenging.
Developing tunable and efficient light sources is crucial for advanced applications.

Purpose of the Study:

To propose and fabricate a novel compound cavity capable of both WGM and random lasing.
To investigate the transformation between WGM and random lasing modes.
To demonstrate the tunability of laser performance for potential sensing applications.

Main Methods:

Fabrication of a WGM-random compound cavity using inkjet printing and metal-assisted chemical etching.
Integration of an ultrathin polymer membrane to create a polymer laser device.
Optical pumping to induce and observe lasing phenomena.

Main Results:

Successful fabrication of a compound cavity supporting both WGM and random lasing.
Observation of a transformation between WGM lasing and random lasing under optical pumping.
Demonstration of easily tailorable laser performance by adjusting cavity parameters.

Conclusions:

The developed WGM-random compound cavity provides a new platform for integrated light sources.
The tunable laser performance makes it suitable for advanced sensing applications.
This work opens new avenues for designing multifunctional photonic devices.