Impact Statement:We demonstrate a High-order transverse mode (HM) VCSELs which can emit localized hollow laser beam (HLB) .With the introduction of a circular inverted surface relief with...Show More
Abstract:
Vertical-cavity surface-emitting lasers that can be controlled to emit hollow laser beam in certain LP21 mode are proposed and fabricated. A circular inverted surface rel...Show MoreMetadata
Impact Statement:
We demonstrate a High-order transverse mode (HM) VCSELs which can emit localized hollow laser beam (HLB) .With the introduction of a circular inverted surface relief with precisely designed diameter and thickness, the device shows a stable single LP21 mode.Compared to traditional techniques for producing HLB, our results provide a monolithic HLB generation method, which greatly simplifies the system complexity.
Abstract:
Vertical-cavity surface-emitting lasers that can be controlled to emit hollow laser beam in certain LP21 mode are proposed and fabricated. A circular inverted surface relief with precisely designed diameter and thickness is introduced through theoretical simulation. The fabricated device shows a stable single LP21 mode operation with excellent robustness of mode and power to temperature. Preliminary analysis attribute the excellent performance of the device to the inverted surface relief, leading to hollow near-field spot distribution.
Published in: IEEE Photonics Journal ( Volume: 12, Issue: 4, August 2020)
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