A New and Comprehensive Approach for the Development of a Compact, High-Performance Rubidium Clock using Raman-Ramsey Interference in Atomic Vapor
Abstract
The research was carried out keeping in mind compact, high-performance clock development, which relies on technologies that can be miniaturized. We designed a prototype of the Raman clock using a small (2 cm in length), buffer-gas filled, and isotopically pure 87Rb cell. A fiber-coupled, waveguide electro-optic modulator was used to generate the frequency-modulated CPT beam for the experiments. The experimental setup was operated either by continuous excitation or pulsed excitation for experimentally characterizing CPT and Ramsey interference and testing different optical excitation schemes. Several iterations of the clock physics package were developed in order to attain better frequency stability performance of the Raman clock. The experimental work provided the basis to develop a new repeated-query technique for producing Ramsey fringe with high S/N ratio. Atom-field interaction involved in a vapor medium is often more complex. It is difficult to model this interaction in order to predict its influence on CPT characteristics and, hence, the performance of the Raman clock. We developed a comprehensive atomic model to investigate light shift with pulsed excitation. It demonstrated the possibility of reducing (or suppressing) the light shift associated with Ramsey interference for achieving higher frequency stability in the Raman clock.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 2017
- Accession Number
- AD1063218
Entities
People
- G. S. Pati
- Renu Tripathi
- S. Shahriar
Organizations
- Delaware State University