Atomic Oscillator Shared Optical Path for Compact MOT Design
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Solution Overview
Problem
Existing atomic oscillators of the magneto-optical trap type face challenges in cost reduction and size reduction due to the complexity of laser light application from multiple directions, requiring numerous optical elements and anti-reflection coatings, which complicate the glass cell structure.
Innovation Solution
The atomic oscillator integrates a first laser device applying laser light from multiple directions through a shared optical path with a second laser device for measuring resonance frequency, reducing the number of optical elements and simplifying the glass cell design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If laser light is applied from multiple directions using separate optical paths, then the magneto-optical trap function is achieved, but the number of optical elements and glass cell complexity increases
Solution Approach 1:
The patent combines multiple laser beams (first and second laser lights) into a single optical path using a beam combining mechanism. This allows laser light to be applied from multiple directions to achieve the magneto-optical trap function while reducing the number of separate optical elements and simplifying the glass cell structure, directly resolving the technical contradiction between trap function reliability and device complexity
Solution Approach 2:
The patent creates a multi-functional optical path that serves multiple purposes: it delivers both the first laser light for trapping and the second laser light for frequency measurement through the same optical channel. This universal optical path reduces the number of required optical elements while maintaining all necessary functions, addressing the contradiction between functional completeness and structural simplicity
2Measurement precision
If anti-reflection film coating is applied on both sides of the glass, then optical performance is improved, but manufacturing cost and process complexity increase
Solution Approach 1:
The patent extracts the anti-reflection coating requirement from both surfaces of the glass cell and applies it only to the necessary surface where laser light enters. By identifying and removing the redundant coating requirement, the patent reduces manufacturing complexity and cost while maintaining sufficient optical performance for the magneto-optical trap operation
3Ease of operation
If multiple jigs and optical elements are used for multi-directional laser application, then laser delivery from multiple directions is achieved, but cost and size of the device increase
Solution Approach 1:
The patent merges multiple laser delivery functions into a single integrated optical path system. By combining the first and second laser beams in one optical channel and using a unified positioning jig, the patent achieves multi-directional laser delivery capability while significantly reducing the number of separate jigs and optical elements, thereby reducing both device complexity and size
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration achieves cost and size reductions by minimizing the number of optical components and simplifying the glass cell structure, while maintaining accurate frequency measurement capabilities.
Implementation Method 1
a quadrupole magnetic field is generated in a glass cell containing alkali metal gas, and laser light of specific circular polarization is applied to the center thereof from six directions to spatially trap an atomic population
Implementation Method 2
the natural frequency of an atom is measured using CPT (Coherent Population Trapping), which is a quantum interference effect that occurs when excitation light of two frequencies is applied to an alkali metal atomic gas
Data Source
AI summary
An atomic oscillator of the present disclosure includes a first laser device that applies a first laser light from a plurality of directions to a glass cell in which alkali metal atoms are enclosed, and a second laser device that applies a second laser light to the glass cell. The atomic oscillator is configured in such a manner that the first laser light from one of the directions and the second laser light are made to enter the glass cell through the same optical path.