Turbocharging the Datalink
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Turbocharging the Datalink
The VCSEL is, without doubt, a highly successful device. Over the last 20 years its shipments have totalled more than a billion, with devices primarily used in data communication and sensing applications. In the latter market, data coms, the VCSEL is the most common type of laser deployed. First commercialised as a transceiver by Honeywell in 1996, this class of device, predominantly based on AlGaAs and operating at 850 nm, initially offered a line rate of 1 Gbit/s. Today this has increased to 28 Gbit/s, by which time the number of VCSELs in the data centres has climbed to total more than hundreds of millions.
