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Silicon Raman Laser Cascades Toward Mid-IR Spectral Region

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First and second Stokes wavelengths are useful for molecular spectroscopy.

Breck Hitz

The mid-IR spectral region, often defined as wavelengths between 2 and 5 μm, is important to spectroscopy because virtually all molecules have unique rotational-vibrational “fingerprints” in that region. However, building compact and efficient laser sources in the region is challenging. Today, most mid-IR laser sources are based on bulky and expensive solid-state lasers, whose nominal 1-μm outputs are converted via nonlinear optics, or on lead-salt diode lasers that typically operate at cryogenic temperatures. Figure 1. Nine ring resonators, such as the one diagrammed in Figure...Read full article

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    Published: April 2008
    Basic Sciencediode lasersLaser Sourcesmid-IR spectral regionResearch & TechnologyspectroscopywavelengthsLasers

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