Development of high-purity optical grade single-crystal CVD diamond for intracavity cooling
Development of high-purity optical grade single-crystal CVD diamond for intracavity cooling
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开发用于腔内冷却的高纯度光学级单晶CVD金刚石
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
M. Bass
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文献类型：
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作者：
A. Bennett;Benjamin Wickham;H. Dhillon;Ying Chen;S. Webster;G. Turri;M. Bass
微波辅助化学气相沉积的块状金刚石产品已被用于一系列高功率激光系统中，这是由于在一系列波长范围内的低吸收和优异的热性能。然而，由于多晶材料的固有特性即双折射和散射，多晶产品的应用经常被限制在较长波长的应用或光路之外的热用途。然而，存在一些固态结构，包括薄盘增益模块和放大器，如果金刚石可以用作光路中的散热器以及盘的后表面上的散热器，则它们将在潜在的输出功率方面显著地增益。因此，已经开发出克服多晶材料的限制的单晶等级的金刚石，其具有低吸收、低散射和低双折射等级，用于要求苛刻的光学应用。我们将提供新的数据，表征这些材料在红外和可见光波长范围内的性能，并通过激光量热法在1064 nm至452 nm的波长范围内测量吸收系数。
Microwave assisted chemical vapour deposited bulk diamond products have been used in a range of high power laser systems, due to low absorption across a range of wavelengths and exceptional thermal properties. However the application of polycrystalline products has frequently been limited to applications at longer wavelengths or thermal uses outside of the optical path due to the birefringence and scatter that are intrinsic properties of the polycrystalline materials. However, there are some solid state structures, including thin disc gain modules and amplifiers, that will gain significantly in terms of potential output powers if diamond could be used as a heat spreader in the optical path as well as a heat spreader on the rear surface of the disk. Therefore single crystal grades of diamond have been developed that overcome the limitations of the polycrystalline material, with low absorption, low scatter and low birefringence grades for demanding optical applications. We will present new data, characterising the performance of these materials across infra-red and visible wavelengths with absorption coefficient measured by laser calorimetry at a range of wavelengths from 1064 nm to 452 nm.