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Updated: Jan 22, 2026
09:42
Fabrication of a Dipole-assisted Solid Phase Extraction Microchip for Trace Metal Analysis in Water Samples
Published on: August 7, 2016
9.1K
Summary
Continuous-wave alexandrite microchip lasers were developed for 680.4 nm and 749.5 nm wavelengths. These lasers achieved significant output power and high slope efficiencies when pumped by an indium gallium nitride laser diode.
Area of Science:
- Laser physics
- Solid-state lasers
- Materials science
Background:
- Alexandrite (Cr3+:BeAl2O4) is a tunable solid-state laser medium.
- Microchip lasers offer compact and efficient laser designs.
- Diode-pumping enables portable and high-performance laser systems.
Purpose of the Study:
- To develop continuous-wave (CW) alexandrite microchip lasers.
- To investigate laser performance at specific wavelengths (680.4 nm and 749.5 nm).
- To evaluate the efficiency of diode-pumped alexandrite microchip laser systems.
Main Methods:
- Fabrication of microchip resonators by depositing dielectric mirrors on alexandrite crystal surfaces.
- Utilizing an InGaN laser diode (up to 3.5 W at ~445 nm) as the pump source.
- Characterization of laser output power and slope efficiency at targeted wavelengths.
Main Results:
- Achieved CW operation of alexandrite microchip lasers at 680.4 nm and 749.5 nm.
- Extracted laser radiation of >210 mW at 680.4 nm and >570 mW at 749.5 nm.
- Obtained slope efficiencies of 15% at 680.4 nm and 39% at 749.5% with respect to absorbed pump power.
Conclusions:
- Demonstrated the feasibility of CW alexandrite microchip lasers for specific wavelengths.
- Highlighted the effectiveness of InGaN laser diode pumping for these systems.
- Showcased the potential for high-efficiency, compact laser sources in the visible spectrum.
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