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Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Fabrication And Characterization Of Photonic Crystal Slow Light Waveguides And Cavities

Published on: November 30, 2012

Liquid crystal as laser medium with tunable gain spectra.

L M Blinov¹, G Cipparrone, V V Lazarev

¹Laboratorio Regionale LICRYL INFM-CNR and CEMIF.CAL - Department of Physics, Università della Calabria, 87036 Rende (CS), Italy. blinov@fis.unical.it

|June 12, 2008

Summary

This study demonstrates electrically controlled optical gain in dye-doped liquid crystals. This finding enables potential applications in tunable microlasers and light amplifiers.

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Area of Science:

Optics and Photonics
Materials Science

Background:

Dye-doped liquid crystals are explored for optical applications.
Controlling optical gain is crucial for laser and amplifier development.

Purpose of the Study:

To investigate amplified spontaneous emission (ASE) and gain spectra in polarized light.
To demonstrate electric field control of optical gain in liquid crystals.

Main Methods:

Measurements of ASE intensity and gain spectra.
Variations in optical axis orientation and pump intensity.
Application of external electric fields.

Main Results:

ASE intensity and gain spectra were measured in polarized light.
Optical gain switching was experimentally demonstrated using an electric field.
The orientation of the optical axis and pump intensity influenced the gain.

Conclusions:

Liquid crystals with electrically tunable gain are feasible.
These materials can be utilized in microlasers and light micro-amplifiers.
Both planar and waveguiding geometries are suitable for these applications.