多波长辐照下熔石英光学元件的损伤及损伤增长

邱荣; 蒋勇; 郭德成; 叶成; 史晋芳; 周强; 韩伟; 黄进

doi:10.11884/HPLPB201931.190211

多波长辐照下熔石英光学元件的损伤及损伤增长

doi: 10.11884/HPLPB201931.190211

邱荣^{1, 2,},
蒋勇^{1, 2},
郭德成^{1, 2},
叶成¹,
史晋芳¹,
周强¹,
韩伟³,
黄进³

1.
西南科技大学极端条件物质特性联合实验室, 四川绵阳 621010
2.
四川省军民融合研究院, 四川绵阳 621010
3.
中国工程物理研究院激光聚变研究中心, 四川绵阳 621900

基金项目:

国家自然科学基金委员会与中国工程物理研究院联合基金项目 U1530109

详细信息

作者简介:
邱荣(1978—), 男, 副教授, 主要从事强激光与物质相互作用的理论与应用技术研究, 43951700@qq.com

中图分类号: O469
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- 被引次数: 0
出版历程
- 收稿日期: 2019-06-12
- 修回日期: 2019-06-27
- 刊出日期: 2019-08-15

Damage and damage growth of fused silica optical elements under multi-wavelength irradiation

Qiu Rong^{1, 2
,},
Jiang Yong^{1, 2},
Guo Decheng^{1, 2},
Ye Cheng¹,
Shi Jinfang¹,
Zhou Qiang¹,
Han Wei³,
Huang Jin³

1.
Joint Laboratory for Extreme Conditions Matter Properties, Southwest University ofScience and Technology, Mianyang 621010, China
2.
Sichuan Civil-military Integration Institute, Mianyang 621010, China
3.
Research Center of Laser Fusion, CAEP, P.O.Box 919-988, Mianyang 621900, China

摘要

摘要: 对比研究了基频、二倍频和三倍频激光单独和同时辐照下熔石英光学元件的初始损伤和损伤增长规律, 重点研究了基频和二倍频的加入对三倍频诱导初始损伤和损伤增长的影响, 分析了基频和二倍频相对于三倍频的折算因子。研究结果表明: 当基频和二倍频能量密度较低时, 它们对三倍频损伤几率曲线的影响可以忽略, 但会引起损伤程度的增加; 在多波长同时辐照的损伤增长中, 损伤增长阈值主要取决于三倍频的能量密度, 而损伤增长系数与总的能量密度有关; 折算因子可以同时反映初始损伤和损伤增长的波长效应和波长间的能量耦合效应。
- 激光诱导损伤 /
- 熔石英 /
- 多波长激光 /
- 初始损伤 /
- 损伤增长 /
- 折算因子
Abstract: The initial damage and damage growth of fused quartz optical elements irradiated by fundamental frequency, double frequency and triple frequency lasers alone and at the same time are studied comparatively.The effects of fundamental and double frequencies on the initial damage and damage growth induced by triple frequencies are emphatically studied.The conversion factors of fundamental frequency and double frequency relative to triple frequency are analyzed.Research results show that, when the energy density of fundamental frequency and double frequency is low, their influence on damage probability curve of triple frequency can be neglected.However, it will cause an increase in the degree of damage.In multi-wavelength simultaneous irradiation damage growth, the damage growth threshold mainly depends on the energy density of triple frequency, and the damage growth coefficient is related to the total energy density.The conversion factor can reflect both the wavelength effect of initial damage and damage growth and the energy coupling effect between wavelengths.
- laser induced damage /
- fused silica /
- multi-wavelength laser /
- initial damage /
- damage growth /
- conversion factor

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图 1 多波长激光损伤实验系统光路示意图

Figure 1. Optical path diagram of multi-wavelength laser damage experimental system

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图 2 1ω, 2ω和3ω单独辐照下熔石英的损伤几率曲线

Figure 2. Damage probability curves of fused quartz irradiated by 1ω, 2ω and 3ω lasers

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图 3 1ω和3ω同时辐照下熔石英的损伤几率曲线

Figure 3. Damage probability curves of fused quartz under simultaneous irradiation of 1ω and 3ω lasers

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图 4 2ω和3ω同时辐照下熔石英的损伤几率曲线

Figure 4. Damage probability curves of fused quartz under simultaneous irradiation of 2ω and 3ω lasers

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图 5 三波长辐照下熔石英的损伤几率曲线

Figure 5. Damage probability curve of fused quartz under three-wavelength irradiation

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图 6 单波长和双波长辐照下熔石英的损伤增长规律

Figure 6. Damage growth of fused quartz under single and double wavelength irradiation

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图 7 单波长辐照下的熔石英损伤增长系数与能量密度的关系

Figure 7. Relationship between damage growth coefficient and energy density of fused quartz under single wavelength irradiation

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图 8 双波长同时辐照下熔石英的损伤增长系数与总能量密度的关系

Figure 8. Relation between damage growth coefficient and total energy density under dual wavelength simultaneous irradiation

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表 1 1ω和3ω同时辐照下初始损伤的折算因子

Table 1. Conversion factor of initial damage under simultaneous irradiation of 1ω and 3ω lasers

damage probability/%	conversion factor
damage probability/%	8.0 J/cm²	11.5 J/cm²	16.0 J/cm²	22.8 J/cm²	49.0 J/cm²
0	~0.02	~0.04	~0.05	~0.08	0.18
50	~0.02	~0.04	~0.05	~0.08	0.22
100	~0.02	~0.04	~0.05	~0.08	0.28

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表 2 2ω和3ω同时辐照下初始损伤的折算因子

Table 2. Conversion factor of initial damage under simultaneous irradiation of 2ω and 3ω lasers

damage probability/%	conversion factor
damage probability/%	4.0 J/cm²	7.2 J/cm²	14.4 J/cm²	23.0 J/cm²	25.6 J/cm²
0	—	0.2	0.27	0.31	0.33
50	—	0.23	0.35	0.4	0.42
100	—	0.27	0.46	0.53	0.55

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表 3 三波长同时辐照下初始损伤的折算子(1ω与2ω之和相对于3ω)

Table 3. Conversion operator for initial damage under simultaneous irradiation of three wavelengths (sum of 1ω and 2ω lasers relative to 3ω laser)

damage probability/%	conversion factor
damage probability/%	2ω@ 5.8 J/cm²	1ω@ 5.8 J/cm²	2ω@ 11.5 J/cm²	1ω@ 11.5 J/cm²	2ω@ 23.0 J/cm²	1ω@ 23.0 J/cm²
0	0.16		0.28		0.34
50	0.2		0.34		0.45
100	0.22		0.45		0.6
注：上述折算因子通过损伤几率曲线拟合得到。

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表 4 1ω和3ω同时辐照下损伤增长的折算因子

Table 4. Conversion factors of damage growth under simultaneous irradiation of 1ω and 3ω lasers

damage growth coefficient	conversion factor
damage growth coefficient	4 J/cm²	6 J/cm²	8 J/cm²
0.1	—	—	—
0.2	0.75	0.7	0.7
0.3	0.83	0.82	0.76
0.4	0.92	0.9	0.82
0.5	0.98	0.98	0.88

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表 5 2ω和3ω同时辐照下损伤增长的折算因子

Table 5. Conversion factors of damage growth under simultaneous irradiation of 2ω and 3ω lasers

damage growth coefficient	conversion factor
damage growth coefficient	4 J/cm²	6 J/cm²	8 J/cm²
0.1	0.7	0.64	0.63
0.2	0.72	0.67	0.65
0.3	0.75	0.73	0.75
0.4	0.82	0.8	0.78
0.5	0.95	0.98	0.87

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