Results 31 to 40 of about 1,393 (184)
Radiation effect and simulation of 850 nm vertical-cavity surface-emitting laser
He jishu, 2022 BackgroundVertical cavity surface emitting lasers (VCSEL) have very high application value in space radiation environment.PurposeThis study aims to explore the degradation rule and mechanism of 850 nm VCSEL in harsh radiation environment.MethodsFirst of ...
CHEN Jiawei +4 more
doaj +1 more source
Journal of Intelligent Medicine, EarlyView.Abstract With global population aging, age‐related hearing loss has become a major public health concern. Understanding the relationship between auditory functional decline and cochlear structural degeneration is essential for early detection and precise intervention.
Shu Zheng +3 more
wiley +1 more source
1 W Single‐Mode Large‐Area Edge‐Emitting Laser via Non‐Hermitian Spatial Mode Filtering
Laser &Photonics Reviews, EarlyView.We demonstrate a non‐Hermitian spatial mode filtering approach for achieving high‐power single‐mode operation in large‐area edge‐emitting laser diodes. By symmetrically coupling passive filter arrays to the main lasing waveguide, higher‐order transverse modes are effectively suppressed while preserving the fundamental mode.
Ece Karabey +4 more
wiley +1 more source
Crystals, 2019 In this study, we theoretically designed and experimentally fabricated an InGaN vertical-cavity surface-emitting laser (VCSEL) with a tunnel junction (TJ) structure. From numerical simulation results, the optical loss of the device can be reduced by a TJ
Chih-Chiang Shen +11 more
doaj +1 more source
Laser &Photonics Reviews, EarlyView.Room‐temperature lower‐polariton‐like lasing is realized in an InGaN/GaN thin‐film ridge cavity with lateral distributed Bragg reflectors. Near‐field optical microscopy distinguishes the transverse side‐DBR‐confined mode from a longitudinal photon‐like mode, while simulations reproduce their spatial profiles.
Wai Yuen Fu +2 more
wiley +1 more source
Vertical Cavity With a Chirped Heterostructure Dual-Period High-Contrast Grating
IEEE Photonics Journal, 2022 A vertical cavity using a chirped heterostructure dual-period high-contrast grating (HCG) by simple fabrication is demonstrated. The reflectivity spectra of the vertical cavity were measured, consistent well with the calculated results.
Jing Zhang +3 more
doaj +1 more source
Drive‐Efficient GHz‐Rate Binary‐State Updates Enabled by VCSEL Polarization Switching
Laser &Photonics Reviews, EarlyView.Photonic computing needs a compact node that can hold a binary state and update it fast. A vertical‐cavity surface‐emitting laser biased at its polarization‐switching point could serve as one: its two orthogonal linear polarizations are the two states, and a small electrical drive is enough to move the output from one state to the other at gigahertz ...
Zifeng Yuan +6 more
wiley +1 more source
Photonics, 2022 Directly modulated 850-nm multimode vertical-cavity surface-emitting lasers (MM-VCSELs) with different oxide apertures and transmission microstrip lengths are compared on the transmission performance of the non-return-to-zero on-off keying (NRZ-OOK) and ...
Jui-Hung Weng +7 more
doaj +1 more source
Programmable Temporal Dynamics in a Laser Neuron for High‐Speed Photonic Reservoir Computing
Laser &Photonics Reviews, EarlyView.Memory and nonlinearity play crucial roles in reservoir computing (RC). An adaptive photonic RC system is demonstrated based on a high‐speed laser graded neuron, whose dynamics, encompassing memory and nonlinearity, can be flexibly programmed through a straightforward bias‐tuning approach.
Yikun Nie +5 more
wiley +1 more source
IEEE Photonics Journal, 2019 In this paper, we present an application-oriented investigation of parasitic limitation on the large signal performance of VCSELs when multilevel modulation is applied. VCSELs with different damping are taken into consideration.
Chenyu Liang +4 more
doaj +1 more source