Atomic Clock Laser Evaluation via Optical Shutter Switching
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Solution Overview
Problem
Existing methods for evaluating laser light characteristics in optical apparatuses, such as atomic clocks, incur additional costs and increase the size of the apparatus due to the need for detachment of components or separate optical paths for beam profiling, which is not feasible for stable and accurate operation.
Innovation Solution
An evaluation method using an optical shutter to switch between irradiation and cut-off of laser light, allowing for the detection of temporal changes in light quantity to assess characteristics without additional components or detachment, utilizing existing apparatus components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visual observation or beam profile measurement is used to evaluate laser light characteristics, then measurement accuracy is improved, but apparatus cost and size increase
Solution Approach 1:
The optical shutter is designed to serve dual purposes: controlling laser light irradiation to atoms during normal atomic clock operation, and enabling laser light characteristic evaluation by switching between irradiation and cut-off states. This multi-functionality eliminates the need for separate evaluation equipment, resolving the contradiction between measurement accuracy and apparatus complexity.
Solution Approach 2:
The atomic clock apparatus evaluates its own laser light characteristics using its existing components (optical shutter and atom detector) without requiring external evaluation equipment. The system uses its operational components to perform self-diagnosis, achieving accurate measurement while avoiding additional apparatus cost and size.
2Ease of operation
If housing detachment is performed for visual observation of laser light, then measurement accessibility is improved, but work cost and operation time increase
Solution Approach 1:
The evaluation system operates entirely within the sealed housing using existing components. The optical shutter and atom detector evaluate laser light characteristics without requiring housing detachment, eliminating work time loss while maintaining measurement capability.
Solution Approach 2:
The optical shutter performs both its primary function of controlling laser irradiation to atoms and the additional function of enabling laser characteristic evaluation. This dual functionality allows evaluation to be conducted through the existing optical path without housing detachment, improving ease of operation.
3Measurement precision
If beam profiler is provided in housing for laser light evaluation, then measurement capability is improved, but apparatus cost and size increase
Solution Approach 1:
The optical shutter enables the atom detector to perform dual functions: detecting atoms during normal operation and measuring laser light characteristics during evaluation. This eliminates the need for a separate beam profiler, reducing apparatus cost and size while maintaining measurement capability.
Solution Approach 2:
The atom detector evaluates laser light characteristics using its existing detection capability, without requiring a dedicated beam profiling device. The system uses its own components for self-evaluation, avoiding additional apparatus complexity.
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
Enables cost-effective and size-efficient evaluation of laser light characteristics, ensuring stable operation of atomic clocks by monitoring laser light variations without increasing apparatus size or cost.
Implementation Method 1
an optical shutter that switches between irradiation of the detector with laser light and cut-off of laser light to the detector
Implementation Method 2
a detector that detects laser light
Data Source
AI summary
An evaluation method evaluates characteristics of laser light in an optical apparatus. The optical apparatus includes a laser light source that emits laser light, a detector that detects laser light, and an optical shutter that switches between irradiation of the detector with laser light and cut-off of laser light to the detector. The evaluation method includes transmitting to the optical shutter, an instruction to switch between irradiation and cut-off, obtaining temporal change in quantity of light detected by the detector during a period from transmission of the instruction until completion of switching, and evaluating characteristics of laser light based on the obtained temporal change.