1. Contaminant-free end-capped and single-mode acetylene photonic microcell for sub-Doppler spectroscopy
- Author
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Fetah Benabid, Foued Amrani, Martin Maurel, Frédéric Gérôme, Matthieu Chafer, Benoit Debord, Thomas Billotte, Photonique Fibre et Sources Cohérentes (XLIM-PHOT), XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), and GLOphotonics S.A.S.
- Subjects
Materials science ,business.industry ,Buffer gas ,Single-mode optical fiber ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Laser ,7. Clean energy ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,law.invention ,010309 optics ,Laser linewidth ,Optics ,law ,0103 physical sciences ,[SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic ,Microcell ,Insertion loss ,0210 nano-technology ,Absorption (electromagnetic radiation) ,business ,Photonic-crystal fiber - Abstract
We report on the development of an acetylene-filled photonic microcell based on an assembly process that is contaminant free and requires no helium buffer gas nor gluing procedure. The microcell consists of a 7-m-long and 30 µm core-diameter inhibited-coupling guiding hollow-core photonic crystal fiber filled with acetylene gas at a pressure in the range of 80 µbar, sealed by capping its ends with fusion-collapsing a glass-tube sleeve, and mounted on FC connectors for integration. The microcell shows a robust single-mode behavior and a total insertion loss of ∼ 1.5 d B . The spectroscopic merit of the formed microcell is tested by generating electromagnetic induced transparency and saturated absorption on R13 and P9 absorption lines, respectively. The sub-Doppler transparencies show a close to transit time limited linewidth of 17 ± 3 M H z . The latter was monitored for over 3 months. As a demonstration, the microcell was used to frequency stabilize a laser with fractional frequency instability improvement by a factor 50 at 100 s integration time compared to free running laser operation.
- Published
- 2021