Mid-IR erbium-doped ZBLAN fiber laser is widely tunable

April 5, 2016
The emitter has the largest tuning range of any fiber laser.

A mid-IR rare-earth-doped fiber laser made of ZBLAN (zirconium fluoride/barium fluoride/lanthanum fluoride/aluminum fluoride/sodium fluoride) has an emission center wavelength of 3.5 μm and a tuning range of 450 nm; the long-wavelength end of its range, 3.78 μm, makes this laser the longest-wavelength emission from any room-temperature fiber laser.1 Developed at the University of Adelaide (Australia), has an output power of 1.45 W at its center wavelength.

Importantly, the laser operates in a wavelength range in which the spectroscopic "molecular fingerprints" of many organic molecules occur.

"In fact this laser has the largest wavelength tuning ever demonstrated by a fiber laser," says researcher Ori Henderson-Sapir.

"The new laser is operating at a wavelength where many hydrocarbon gases, including the greenhouse gases, absorb light," says David Ottaway, another researcher. "This means that by changing the wavelength of our laser, we can measure the light absorption patterns of different chemicals with a high degree of sensitivity. This will allow us to detect small concentrations of these gases at considerable distances. Remote detection of greenhouse gasses such as methane and ethane opens up the prospect of differentiating between various potential emission sources, such as natural gas extraction and agriculture, and so pinpoint areas of concern."

Other potential applications for the future include the possibility of analyzing trace gases in exhaled breath at a clinic to detect the presence of disease. For example, acetone can be detected in the breath when someone has diabetes.

The research was supported by the South Australian government through the Premiers Research and Industry Fund and the Australian Research Council.

Source: http://www.adelaide.edu.au/news/news83962.html

REFERENCE:

1. Ori Henderson-Sapir et al., Optics Letters (2016); doi: 10.1364/OL.41.001676

Sponsored Recommendations

Demonstrating Flexible, Powerful 5-axis Laser Micromachining

Sept. 18, 2024
Five-axis scan heads offer fast and flexible solutions for generating precise holes, contoured slots and other geometries with fully defined cross sections. With a suitable system...

Enhance Your Experiments with Chroma's Spectra Viewer

Sept. 5, 2024
Visualize and compare fluorescence spectra with our interactive Spectra Viewer tool. Easily compare and optimize filters and fluorochromes for your experiments with this intuitive...

Optical Filter Orientation Guide

Sept. 5, 2024
Ensure optimal performance of your optical filters with our Orientation Guide. Learn the correct placement and handling techniques to maximize light transmission and filter efficiency...

Ensure Optimal Performance with Shortpass Filters

Sept. 5, 2024
Achieve precise wavelength blocking with our Shortpass Filters. Ideal for applications requiring effective light transmission and cutoff, these filters ensure optimal performance...

Voice your opinion!

To join the conversation, and become an exclusive member of Laser Focus World, create an account today!