Fiber-coupled external cavity DFB-laser

2025/05/21 by David C. Nak, Nak, David C., Jasper Riebesehl +3 · 1 citation
Physics and Astronomy · Computer Science · #Advanced Frequency and Time Standards #Cold Atom Physics and Bose-Einstein Condensates #Quantum Information and Cryptography

paper · pdf · doi:10.48550/arxiv.2505.15591

Abstract

Narrow-linewidth, compact and robust laser systems are of high interest, especially with prospects for portable quantum metrological applications. We realized an external cavity DFB-laser incorporating an intra-cavity EOM in a fully fiber-coupled manner. Additional active feedback on the EOM, by referencing a high finesse cavity, enabled us to reach low kHz-linewidths. We analyzed the laser spectrum by means of delayed self-heterodyne measurements to reconstruct the power spectral density. This is achieved by utilizing a data-driven power spectrum equalization approach. The presented laser setup is successfully used to create an ultracold gas by laser cooling on a narrow atomic transition of ⁴⁰Ca at 1978 nm.

Citations

• Interference Fringe Mitigation in Short-Delay Self-Heterodyne Laser Phase Noise Measurements

Cited by

• Interference Fringe Mitigation in Short-Delay Self-Heterodyne Laser Phase Noise Measurements

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