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Mid-IR VCSEL Operates at Room Temperature

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Michael D. Wheeler

An optically pumped vertical-cavity surface-emitting laser (VCSEL) that emits in the mid-IR at above room temperature in pulsed mode could have far-reaching implications for chemical analysis and atmospheric pollution monitoring. Nearly all gas molecules, including a number of important pollutants, have their strongest absorption in the mid-infrared portion of the spectrum. Therefore, the sensitivity of gas detection using mid-IR radiation is several magnitudes higher than it is using near-IR. No semiconductor laser emitting in the mid-IR, however, comes close to the performance or the...Read full article

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    Published: May 2002
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