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Photoluminescence: Applications01:14

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Related Experiment Video

Updated: Jun 19, 2026

Triplet Fusion Upconversion Nanocapsule Synthesis
08:36

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Published on: September 7, 2022

Visible cooperative upconversion laser in Er:LiYF(4).

P Xie, S C Rand

    Optics Letters
    |October 3, 2009
    PubMed
    Summary

    We achieved trio upconversion laser action in erbium-doped lithium yttrium fluoride (Er:LiYF(4)) crystals, emitting green light. This performance is compared to previous green erbium upconversion lasers.

    Area of Science:

    • Laser physics
    • Solid-state lasers
    • Upconversion spectroscopy

    Background:

    • Upconversion lasers offer unique spectral pathways.
    • Erbium-doped materials are known for their upconversion properties.
    • Efficient green emission from upconversion is desirable for various applications.

    Purpose of the Study:

    • To report and characterize trio upconversion laser action in Er:LiYF(4).
    • To investigate laser performance under 1.55 micrometer excitation.
    • To compare this performance with existing green erbium upconversion lasers.

    Main Methods:

    • Experimental setup for continuous-wave (cw) laser operation.
    • Optical excitation using a 1.55 micrometer laser source.
    • Temperature-dependent measurements up to 95 Kelvin.

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    Main Results:

    • Achieved continuous-wave (cw) laser emission at 0.55 micrometer (green light).
    • Demonstrated trio upconversion process in Er:LiYF(4).
    • Observed laser action at temperatures up to 95 K.

    Conclusions:

    • Er:LiYF(4) is a viable material for green upconversion lasers.
    • 1.55 micrometer excitation enables efficient green emission via trio upconversion.
    • Performance characteristics warrant further investigation for practical applications.