http://myvcsel.com/what-is-a-vcsel/" alt="Image result for what is vcsel" align="middle" height="160" src="data:image/jpeg;base64,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" width="182" class="iuth" />
A vertical-cavity surface-emitting laser(VCSEL) is a semiconductor-based laser diode that emits a highly efficient optical beam vertically from its top surface.