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Distributed-feedback dye-doped solgel silica lasers.

X L Zhu¹, S K Lam, D Lo

¹Department of Physics, Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China.

|March 18, 2008

Summary

Researchers demonstrated distributed feedback lasers using dye-doped solgel silica. These lasers, emitting at 480 and 585 nm, showed tunable wavelengths and narrow linewidths, paving the way for new photonic devices.

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Sol-gel silica laser tunable in the blue.

Applied optics·2010

Area of Science:

Materials Science
Optics and Photonics
Laser Physics

Background:

Solgel silica offers a versatile host matrix for optical materials.
Dye-doped solid-state lasers are crucial for tunable light sources.
Distributed feedback (DFB) mechanisms enhance laser performance and spectral control.

Purpose of the Study:

To demonstrate dye-doped solgel silica lasers utilizing distributed feedback.
To investigate the laser characteristics, including emission wavelength, tunability, and linewidth.
To explore the fabrication of periodic gain modulation in solgel silica slabs.

Main Methods:

Fabrication of solgel silica slabs doped with Rhodamine 6G and Coumarin 460 dyes.
Creation of periodic gain modulation using holographic grating and laser interference patterns.
Characterization of laser emission properties, including wavelength, tunability, and linewidth.

Main Results:

Demonstrated distributed feedback lasers in dye-doped solgel silica.
Achieved laser emission centered at 480 nm (Rhodamine 6G) and 585 nm (Coumarin 460).
Observed wavelength tunability of approximately 20 nm and a laser linewidth of ~60 pm.

Conclusions:

Dye-doped solgel silica is a viable material for distributed feedback lasers.
The demonstrated DFB lasers exhibit tunable emission and narrow linewidths.
This work contributes to the development of novel solid-state tunable laser sources.

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