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Innovations in Photonics

Innovations in Photonics – Recent Society Publications

Stay up-to-date on the latest in photonics research depicted in Infographics and Video Abstracts, and described in press releases – based on the most recent IEEE Photonics Society Publications.

Infographics

A layered diagram of a Hybrid Plasmonic Waveguide (HPW) optical modulator. The structure, built on a Silicon substrate with SiO₂ and P-Si layers, includes an Ag metallic core and an active AZO layer controlled by a 1V voltage input. Key features are broadband modulation (1500-1650 nm), high efficiency (2.75 V-µm), and a high extinction ratio (45 dB/µm), making it suitable for low-power photonic and quantum systems.

Enhanced Optical Modulation in AZO-Based Engineered Hybrid Plasmonic Waveguide: High Extinction Ratio and Low Voltage Operation

Journal Of Quantum Electronics
A big leap in on-chip optical modulation technology – researchers have developed a hybrid plasmonic waveguide (HPW) for highly efficient intensity and phase modulation of optical signals.
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A diagram illustrating the layered structure of an ITO/p-GaN Vertical-Cavity Surface-Emitting Laser (VCSEL) with defect-blocking heterostructures. The structure features Top DBR and Bottom DBR surrounding layers including ITO, p-GaN, p-EBL, Multiple Quantum Wells (MQWs), u-AlGaN, and n-GaN. The design leads to improved hole injection, faster stabilization, reduced hole trapping, and increased laser output power.

Enhanced Static and Dynamic Performance for GaN-Based VCSELs with ITO/p-GaN Resistive Current Injection Structure 24 Surface-emitting semiconductor lasers

Journal of Quantum Electronics
Researchers propose an ITO/p-GaN resistive current injection structure for GaN-based VCSELs. The design boosts hole injection efficiency, reduces leakage, and enhances laser stability—advancing high-performance optical communication and sensing applications.
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This page presents an infographic summarizing the experimental demonstration of a 150-Channel Laser Array for Dense Wavelength Division Multiplexing Systems. The core finding is that researchers successfully demonstrated a distributed feedback (DFB) laser array for multiwavelength emissions using the reconstructed equivalent chirp (REC) technique.

Experimental Demonstration of 150-Channel REC-DFB Laser Array Based on Asymmetric Multiple-Quantum-Well

Journal of Quantum Electronics
Researchers have experimentally demonstrated a 150-channel multiwavelength distributed feedback laser array—the highest channel count reported to date! With precise wavelength spacing, it advances dense optical communications.
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Diagram illustrating the simulation workflow and structural components of a monolithic mode-locked Indium Arsenide/Indium Phosphide (InAs/InP) quantum dash ridge laser. The workflow steps are: Experimental measurements, Adapted quantum states, Device simulation, and Performance analysis. The device layers shown are p++-InGaAs, p-InP, InAs active region, and n-InP substrate. The model is strong in predicting threshold current density, differential efficiency, temperature dependence, and carrier transport, but weak in predicting spectral output, mode-locking behavior, and optical dynamics.

Numerical Modeling of InAs/InP Quantum Dash Ridge Lasers as a Function of Temperature (JQE)

Journal of Quantum Electronics
A model of InAs/InP quantum dash mode-locked lasers shows accurate predictions of threshold and thermal efficiency—but fails to capture spectral dynamics.
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Research News Stories

Broadband and high-filtering-efficiency band-rejection filters fabricated using femtosecond laser line-by-line technology (JLT)

Broadband and high-filtering-efficiency band-rejection filters fabricated using femtosecond laser line-by-line technology

Journal of Lightwave Technology
While fiber Bragg grating is widely used for selectively filtering wavelengths during optical transmission, existing techniques are unsuitable for bandwidth filtering of broadband optical signals. Researchers have now demonstrated that chirped and tilted fiber Bragg grating (CTFBG) using femtosecond laser line-by-line technology can facilitate highly specific and versatile bandwidth filtering in broadband signals. The technique may offer several added advantages in optical signal filtering beyond flexibility and customizability.
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Video Shorts

Implementation of 105 m dynamic underwater wireless optical communication in the deep sea (PTL)

Implementation of 105 m dynamic underwater wireless optical communication in the deep sea

Photonics Technology Letters
With human exploration of the ocean and continuous innovation in deep-sea technology, deep-sea submersibles have also put forward a demand for high-speed underwater wireless optical communication.
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