Acousto-Optic Modulator Thermal Management for EUV Sources
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Solution Overview
Problem
Optical modulators used in extreme ultraviolet (EUV) light sources face thermal damage due to excess heat from high-power input light beams, leading to reduced performance and shortened lifespan.
Innovation Solution
An optical modulator incorporating an acousto-optic assembly with a thermal management apparatus, featuring thermally conductive materials like diamond in contact with the acousto-optic material to dissipate heat, along with anti-reflection coatings and heat sinks to prevent thermal damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high-power input light beam is used to increase modulation capability, then optical modulation performance is improved, but thermal damage to the acousto-optic material occurs
Solution Approach 1:
A thermally conductive material is introduced as an intermediary between the acousto-optic material and the heat sink. This intermediary material with high thermal conductivity facilitates efficient heat transfer from the acousto-optic material to the heat sink, enabling the system to handle high-power input light beams without thermal damage to the acousto-optic material.
Solution Approach 2:
Heat is extracted from the acousto-optic material through the thermally conductive material and heat sink combination. The heat generated by high-power light beam interaction is continuously removed from the acousto-optic material, preventing thermal accumulation and damage while maintaining high modulation capability.
2Device complexity
If conventional thermal management is used, then device structure is simple, but heat dissipation efficiency is insufficient
Solution Approach 1:
The thermal management system uses a composite structure combining different materials with complementary properties: the acousto-optic material for modulation function, and a thermally conductive material with high thermal conductivity for efficient heat dissipation. This composite approach achieves superior heat dissipation efficiency compared to conventional single-material thermal management.
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 thermal management system effectively removes excess heat from the acousto-optic material, enhancing the optical modulator's performance and extending its operational time in high-power EUV light sources by preventing thermal damage.
Implementation Method 1
a first thermally conductive material in thermal contact with the first side of the acousto-optic assembly; and a second thermally conductive material in thermal contact with the second side of the acousto-optic assembly
Implementation Method 2
an acousto-optic material; a first side configured to receive an incident light beam; and a second side configured to emit an output light beam based on the incident light beam
Implementation Method 3
The first thermally conductive material may be attached to the first side by a Van der Waals force, and the second thermally conductive material may be attached to the second side by a Van der Waals force
Data Source
AI summary
An optical modulator includes an acousto-optic assembly and a thermal management apparatus. The acousto-optic assembly includes: an acousto-optic material; a first side configured to receive an incident light beam; and a second side configured to emit an output light beam based on the incident light beam. The thermal management apparatus includes: a first thermally conductive material in thermal contact with the first side of the acousto-optic assembly; and a second thermally conductive material in thermal contact with the second side of the acousto-optic assembly.