High Power Diode Lasers - Center for Biomedical Optics and New ...
High Power Diode Lasers - Center for Biomedical Optics and New ...
High Power Diode Lasers - Center for Biomedical Optics and New ...
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Fabrication<br />
•Materials<br />
• Epitaxy<br />
• Process<br />
Characterization<br />
Laser diodes<br />
• power <strong>and</strong> spectrum measurement<br />
• far-field <strong>and</strong> near-field measurement<br />
• The M² factor : definition, measurement<br />
• Saturation of the power : cause <strong>and</strong> solution = the large optical cavity<br />
Main epitaxial structures : at 808 nm, 940 nm, 980 nm <strong>and</strong> 732 nm<br />
Examples of lasers diodes<br />
• Ridge <strong>and</strong> broad-area lasers at 980 nm<br />
• high brigthness lasers near at 980 nm<br />
• state of the art<br />
• external approach : four-wave mixing<br />
• internal approach : the tapered laser diode<br />
• Tapered lasers bars at 980 nm coupled into an optical fiber<br />
• Laser diodes at 732 nm : broad-area laser results <strong>and</strong> aging test<br />
• Application to photodynamic therapy of laser diodes at 732 nm<br />
• Application to surgery <strong>and</strong> dentistry of laser diodes at 980 nm
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