Absolute frequency references at 1529 nm and 1560 nm using modulation transfer spectroscopy

2015/09/22 by Y. N. Martinez de Escobar, Y. Natali Martinez de Escobar, de Escobar, Y. Natali Martinez +11
Chemistry · Decision Sciences · Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic Physics (physics.atom-ph) #Atomic and Subatomic Physics Research #FOS: Physical sciences #Scientific Measurement and Uncertainty Evaluation #Spectroscopy and Laser Applications #physics.atom-ph

paper · pdf · doi:10.48550/arxiv.1509.06485

5 pages, 4 figures

arxiv created 2015/09/22 · openalex publication_date 2015/09/22 · arxiv updated 2015/09/23 · openalex created_date 2022/10/02 · openalex updated_date 2026/07/28

Abstract

We demonstrate a double optical frequency reference (1529 nm and 1560 nm) for the telecom C-band using ⁸⁷Rb modulation transfer spectroscopy. The two reference frequencies are defined by the 5S_1/2 F=2 → 5P_3/2 F'=3 two-level and 5S_1/2 F=2 → 5P_3/2 F'=3 → 4D_5/2 F"=4 ladder transitions. We examine the sensitivity of the frequency stabilization to probe power and magnetic field fluctuations, calculate its frequency shift due to residual amplitude modulation, and estimate its shift due to gas collisions. The short-term Allan deviation was estimated from the error signal slope for the two transitions. Our scheme provides a simple and high performing system for references at these important wavelengths. We estimate an absolute accuracy of ∼ 1 kHz is realistic.

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