Paper 14090-16
Paper 14090-16
Achieving 170 Hz intrinsic linewidth with a 452 nm GaN DFB Laser Diode through FBG external cavity injection locking
13 April 2026 • 14:20 - 14:40 CEST | Leicester/Salon 12 (Niveau/Level 1)
Abstract
The advancement of narrow linewidth lasers in the visible spectrum is essential for various applications, including laser cooling, atomic clocks, and gas sensing. We report a fiber Bragg grating (FBG) external cavity GaN DFB laser diode emitting at 452 nm with unprecedented narrow linewidth performance. The injection locking scheme reduces the intrinsic linewidth from ~ 1 MHz to 170 Hz, corresponding to nearly 40 dB of noise reduction. The integrated linewidth over a 10 ms time interval is roughly 100 kHz. This approach opens a path toward an integration in a compact package.
Presenter
Georges Perin
L’Institut Foton, Univ. de Rennes, CNRS (France)
Georges Perin is a post-doctorate at the Foton Institut. Most of his work is dedicated to visible light sources and their spectral narrowing to target quantum applications. He previously reported a sub-20 kHz compact laser at 400 nm and will share today a more impressive result at 452 nm.