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physics.optics2025

Chip-scale modulation-free laser stabilization using vacuum-gap micro-Fabry-Pérot cavity

Mohamad Hossein Idjadi, Haotian Cheng, Farshid Ashtiani +5

Narrow-linewidth lasers are vital for a broad range of scientific and technological applications, including atomic clocks and precision sensing. Achieving high frequency stability…

physics.optics2025

From ultra-noisy to ultra-stable: optimization of the optoelectronic laser lock

Takuma Nakamura, Yifan Liu, Naijun Jin +5

We demonstrate thermal-noise-limited direct locking of a semiconductor distributed feedback (DFB) laser to a sub-1 mL volume, ultrastable optical cavity, enabling extremely compact…

physics.optics2025

Dual Laser Self-Injection Locking to a Micro Fabry-Perot for Low Phase Noise Millimeter-wave Generation

William Groman, Naijun Jin, Haotian Cheng +8

Low-noise and accessible millimeter-wave sources are critical for emergent telecommunications, radar and sensing applications. Current limitations to realizing low-noise, deployabl…

physics.optics2024

Harnessing micro-Fabry-Perot reference cavities in photonic integrated circuits

Haotian Cheng, Chao Xiang, Naijun Jin +12

Compact photonic systems that offer high frequency stability and low noise are of increasing importance to applications in precision metrology, quantum computing, communication, an…

physics.optics2024

Ultrastable vacuum-gap Fabry-Pérot cavities operated in air

Yifan Liu, Naijun Jin, Dahyeon Lee +9

We demonstrate a vacuum-gap ultrastable optical reference cavity that does not require a vacuum enclosure. Our simple method of optical contact bonding in a vacuum environment allo…