Advances in GaN laser diodes for quantum sensors and optical atomic clocks

S. P. Najda; P. Perlin; M. Leszczynski; S. Stanczyk; C. C. Clark; T. J. Slight; J. Macarthur; L. Prade; L. McKnight

doi:10.1117/12.2566465

20 September 2020 Advances in GaN laser diodes for quantum sensors and optical atomic clocks

S. P. Najda, P. Perlin, M. Leszczynski, S. Stanczyk, C. C. Clark, T. J. Slight, J. Macarthur, L. Prade, L. McKnight

Proceedings Volume 11540, Emerging Imaging and Sensing Technologies for Security and Defence V; and Advanced Manufacturing Technologies for Micro- and Nanosystems in Security and Defence III; 115400C (2020) https://doi.org/10.1117/12.2566465
Event: SPIE Security + Defence, 2020, Online Only

Abstract

Quantum technologies containing key GaN laser components will enable a new generation of precision sensors, optical atomic clocks and secure communication systems for many applications such as next generation navigation, gravity mapping and timing since the AlGaInN material system allows for laser diodes to be fabricated over a wide range of wavelengths from the u.v. to the visible. We report our latest results on a range of AlGaInN diode-lasers targeted to meet the linewidth, wavelength and power requirements suitable for optical clocks and cold-atom interferometry systems. This includes the [5s²S_1/2-5p²P_1/2] cooling transition in strontium⁺ ion optical clocks at 422 nm, the [5s₂¹S₀-5p¹P₁] cooling transition in neutral strontium clocks at 461 nm and the [5s²s_1/2 – 6p²P_3/2] transition in rubidium at 420 nm. Several approaches are taken to achieve the required linewidth, wavelength and power, including an extended cavity laser diode (ECLD) system and an on-chip grating, distributed feedback (DFB) GaN laser diode.

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S. P. Najda, P. Perlin, M. Leszczynski, S. Stanczyk, C. C. Clark, T. J. Slight, J. Macarthur, L. Prade, and L. McKnight "Advances in GaN laser diodes for quantum sensors and optical atomic clocks", Proc. SPIE 11540, Emerging Imaging and Sensing Technologies for Security and Defence V; and Advanced Manufacturing Technologies for Micro- and Nanosystems in Security and Defence III, 115400C (20 September 2020); https://doi.org/10.1117/12.2566465

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