1. A Clean Sweep for MEMS-VCSELs

    A Clean Sweep for MEMS-VCSELs

    The first integrated 1310 nm wavelengthMEMS-VCSELs have been reported in this issue of Electronics Lettersby collaborating researchers in the US. Optimised specifically for swept-sourceoptical coherence tomography (SS-OCT) applications, these MEMS-VCSELs can also becontinuously tuned over 150 nm, which is the largest tuning rangeof any surface emitting diode lasers at any wavelength. “MEMS-VCSELshave previously demonstrated speed and coherence length advantages for SS-OCT,but questions remained as to whether MEMS-VCSEL tuning range couldcompete with widely tunable external-cavity lasers,” said Dr Vijaysekhar Jayaramanfrom Praevium Research who took the lead on the designand fabrication. “We believe that this work demonstrates for thefirst time that ...

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    1. MEMS-VCSELs have previously demonstrated speed and coherence length advantages for SS-OCT, but questions remained as to whether MEMS-VCSEL tuning range could compete with widely tunable externalcavity lasers...We believe that this work demonstrates for the first time that MEMS-VCSEL tuning range can be on a par with these other devices...We hope to see a renaissance in the MEMS-VCSEL field...We anticipate new wavelength regimes and wider tuning ranges will be reported in the next few years, as well as new spectroscopic applications. We also anticipate significant cost reductions as we take advantage of Thorlabs’ volume semiconductor manufacturing. We look forward to seeing MEMS-VCSELs become an established commercial product for both medical and spectroscopic applications over the next decade.
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