Compact Laser Non-Planar Resonator Geometry
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Solution Overview
Problem
Existing laser technologies face challenges in achieving high-power output while maintaining a compact form factor and thermo-mechanical hardiness, with issues related to resonant mode selection and pulse shaping, which can lead to increased size, weight, and power requirements due to high electric potential demands and limited dynamic range of Q-switches.
Innovation Solution
A compact laser design featuring a non-planar resonator geometry with integrated laser gain medium and pump source, utilizing counter-propagating modes and feedback mechanisms to select dominant resonant modes, and a Q-switch with enhanced dynamic range to achieve high-intensity pulsed output, while mitigating thermal aberrations and maintaining compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional laser resonator designs are used to achieve high-power output, then power output is improved, but device size and weight increase
Solution Approach 1:
The patent combines the pump source and gain medium into an integrated assembly that forms part of the resonator structure itself. The pump chamber is integrated within the resonator, eliminating the need for separate external pumping systems and reducing overall device weight while maintaining high-power output capability.
Solution Approach 2:
The patent implements a nested structure where the gain medium is positioned within the pump chamber, which is itself integrated into the resonator structure. This multi-level nesting allows compact arrangement of components, achieving high power output in a minimized weight package.
2Power
If Q-switches with high dynamic range are used to achieve high-intensity pulsed output, then pulse intensity is improved, but device complexity and power requirements increase
Solution Approach 1:
The patent introduces an intermediary optical element (such as a polarizer or wave plate) within the resonator that acts as a passive Q-switching mechanism. This intermediary component enables high-intensity pulsed output through optical feedback mechanisms rather than requiring complex electronically-controlled Q-switches, thereby reducing device complexity and power requirements.
3Volume of stationary object
If compact resonator structures are used to reduce size, then device volume is reduced, but thermal management challenges increase
Solution Approach 1:
The patent segments the resonator into distinct functional zones including pump chambers, gain medium regions, and output coupling areas. This segmentation allows optimized thermal management in each zone, with pump chambers designed for efficient heat dissipation and gain medium regions optimized for lasing action, enabling compact overall size while managing thermal challenges.
4Volume of stationary object
If non-planar resonator geometry is used to achieve compactness, then device volume is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs asymmetric non-planar resonator geometry where mirror surfaces are positioned at specific non-equal angles and distances. This asymmetric design achieves compact volume while using standard manufacturing tolerances for the optical components, avoiding the need for ultra-precise symmetric configurations that would be difficult and expensive to manufacture.
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
The solution enables high-intensity, compact, and thermally robust laser operation, meeting industry and military specifications with reduced size and weight, and improved pulse shaping capabilities, while avoiding detrimental increases in electric potential and complexity.
Implementation Method 1
a laser gain medium and a pump source integrated within an optical path of the resonator
Implementation Method 2
a laser gain medium and a pump source integrated within an optical path of the resonator
Implementation Method 3
A compact laser in accordance with an exemplary embodiment in the present disclosure includes a compact resonator structure using a non-planar resonator geometry of bulk components
Data Source
AI summary
A compact laser is provided for in accordance with an exemplary embodiment in the present disclosure includes a compact resonator structure using a non-planar geometry of bulk components. The laser includes a preferred rotational direction of lasing modes and employs bulk components for establishing the preferred rotational direction of lasing modes within resonator. In some embodiments, the preferred rotational direction of lasing modes is established using a reflective element that is outside the resonator structure. In some embodiments, the reflective element induces polarization shifts in the reflected light that are compensated for by a wave plate, which may be outside the resonator structure.