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October 2024

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Infographic detailing a Novel Ultrastable 10 GHz Passive Semiconductor Mode-Locked Laser (SMLL) on a semi-insulating substrate with RF hybrid mode-locking (HML). Key benefits include linewidth reduction (to sub-hertz), >40 dBc/Hz phase noise reduction, and reduced timing jitter (80 fs).

Ultrastable 10 GHz Mode-Locked Laser on Semi-Insulating Substrate Through RF Injection Locking

Photonics Technology Letters
Radiofrequency injection locking improves laser stability! Recent @IEEEPhotonics study describes a stable mode-locked laser with a reduced phase noise and timing jitter, a breakthrough for optical clocks and systems.
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Infographic titled 'A High-Speed Cryogenic-Room Temperature Data Link for Practical Quantum Computing'. It features a diagram of a Cryo-VCSEL structure, showing the Top DBR, Gain cavity, Bottom DBR, and Doped GaAs substrate, positioned next to a quantum computer. The key benefits listed are: Wide operating temperature range (2.8 K–300 K), High-speed data transmission at deep cryogenic temperatures, and Enhanced design flexibility. The overall conclusion is that it is a low-cost, energy-efficient option.

Cryo-VCSELs Operated at 2.8 K and 40 K With Record Bandwidth, Power, and Linearity for Optical Data Links in Quantum Computing

Journal of Quantum Electronics
A new study describes Cryo-VCSELs that operate efficiently at ultra-low temperatures, offering more power for optical data links in quantum computing. These can facilitate high-speed data transfer and greater stability.
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Infographic detailing Neural Network-Optimized Raman Amplification for Enhanced U-Band WDM Transmission. The system flow shows a Transmitter connected to a Distributed Raman-amplified transmission system, leading to a Receiver. Key enabling technologies include a bidirectional LSTM neural network, inverse design of an incoherent pump source, and Erbium-doped fiber amplification over 125 km of G.652.D single-mode fiber. Performance indicators show a Received optical power variation of less than 1.2 dB, a significant Raman gain of approximately 15 dB, and a 7% hard decision forward error correction threshold.

Inverse Design of Incoherent Raman Pump Sources for U-Band WDM Transmission Over 125 km G.652.D Fiber

Photonics Journal
In a new @IEEEPhotonics study, researchers have developed an inverse design for Raman pump sources using neural networks to optimize U-band transmission over long distances of standard fiber.
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The technology uses an advanced chip-scale device to sense acoustic pressure changes via light modulation. The system relies on two main parts: GaN-based Hydrophone: The primary chip used for light detection. Sensing Film: A Deformable $\text{PDMS}^*$ film embedded with $\text{TiO}_2$ nanoparticles, which vibrates in response to sound waves, modulating the light signal.

Miniaturized GaN-Based Optical Hydrophones for Underwater Low-Frequency Acoustic Detection

Photonics Technology Letters
A new study reveals a miniaturized GaN-based optical hydrophone designed for underwater acoustic detection. The device detects low-frequency signals with impressive sensitivity, offering a major step forward for marine research and underwater communication.
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Research News Stories

The Future of Optical Modulation

The Future of Optical Modulation

Despite being a mature technology with existence for over several decades, silicon photonic modulators face scrutiny from industry and academic experts. In a recent editorial interview, experts emphasize the need to explore alternatives beyond the traditional platforms. The discussion centered on innovative modulator materials and configurations that could cater to emerging applications in data centers, artificial intelligence, quantum information processing, and LIDAR. Experts also outlined the challenges that lie ahead in this field.
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