Dual-laser self-injection locking to an integrated microresonator
- URL: http://arxiv.org/abs/2201.02130v1
- Date: Thu, 6 Jan 2022 16:25:15 GMT
- Title: Dual-laser self-injection locking to an integrated microresonator
- Authors: Dmitry A. Chermoshentsev, Artem E. Shitikov, Evgeny A. Lonshakov,
Georgy V. Grechko, Ekaterina A. Sazhina, Nikita M. Kondratiev, Anatoly V.
Masalov, Igor A. Bilenko, Alexander I. Lvovsky and Alexander E. Ulanov
- Abstract summary: We experimentally demonstrate the dual-laser SIL of two multifrequency laser diodes to different modes of an integrated Si$_3$N$_4$ microresonator.
Locking both lasers to the same mode results in a simultaneous frequency and phase stabilization and coherent addition of their outputs.
- Score: 93.17495788476688
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Diode laser self-injection locking (SIL) to a whispering gallery mode of a
high quality factor resonator is a widely used method for laser linewidth
narrowing and high-frequency noise suppression. SIL has already been used for
the demonstration of ultra-low-noise photonic microwave oscillators and soliton
microcomb generation and has a wide range of possible applications. Up to date,
SIL was demonstrated only with a single laser. However, multi-frequency and
narrow-linewidth laser sources are in high demand for modern telecommunication
systems, quantum technologies, and microwave photonics. Here we experimentally
demonstrate the dual-laser SIL of two multifrequency laser diodes to different
modes of an integrated Si$_3$N$_4$ microresonator. Simultaneous spectrum
collapse of both lasers, as well as linewidth narrowing and high-frequency
noise suppression , as well as strong nonlinear interaction of the two fields
with each other, are observed. Locking both lasers to the same mode results in
a simultaneous frequency and phase stabilization and coherent addition of their
outputs. Additionally, we provide a comprehensive dual-SIL theory and
investigate the influence of lasers on each other caused by nonlinear effects
in the microresonator.
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