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面向第三代地基引力波探测的激光源需求分析

李庆回 李卫 孙瑜 王雅君 田龙 陈力荣 张鹏飞 郑耀辉

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面向第三代地基引力波探测的激光源需求分析

李庆回, 李卫, 孙瑜, 王雅君, 田龙, 陈力荣, 张鹏飞, 郑耀辉

Laser parameters requirement for third-generation ground-based gravitational wave detection

Li Qing-Hui, Li Wei, Sun Yu, Wang Ya-Jun, Tian Long, Chen Li-Rong, Zhang Peng-Fei, Zheng Yao-Hui
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  • 引力波探测是一项重大国际前沿科技研究, 对探索许多基础科学问题具有重大意义, 然而引力波探测装置的建设面临着极大的技术挑战. 山西大学提出利用废弃地下矿井, 建设臂长为10 km、灵敏度达10–24 Hz–1/2的地基引力波探测装置的建设计划. 理论上, 等臂迈克尔逊干涉仪的灵敏度不受光源噪声的限制. 但是实际的激光干涉仪受臂腔线宽差异、腔镜反射率差异、腔镜质量差异、腔内功率差异等因素限制, 灵敏度依赖于激光源的指标. 本文定量分析了激光源指标参数对干涉仪灵敏度的影响, 并从地基引力波探测装置的设计灵敏度出发, 对激光源的波长、振幅噪声、频率噪声、光束指向噪声和基模纯度提出具体要求. 该分析为建设我国的地基引力波探测装置(预期灵敏度达国际上第三代探测器水平)奠定了激光源噪声分析和干涉仪指标分解等方面的坚实基础.
    Gravitational waves (GWs), predicted by the general relativity of Albert Einstein, are ripples in space-time caused by massive accelerating objects. Since the first direct observation of GWs in 2015, more and more binary black hole mergers and neutron star merger were detected by the laser interferometer gravitational-wave observatory (LIGO) and the Virgo interferometric detector. The construction of the third-generation (3G) gravitational wave detector(GWD), whose sensitivity is ten times that of the second-generation (2G) GWD (Advanced LIGO and Virgo), can not only push the gravitational wave astronomy towards the edge of the observable universe, but also test the fundamental laws of physics and study the nature of matter. By utilizing the abandoned underground mines, Shanxi university proposes to construct a 3G ground-based gravitational wave detector with an arm length of 10 km and a strain sensitivity of 10–24 Hz–1/2, improving the location accuracy of wave source by participating in the global GWD network. The construction of 3G GWD has many technical challenges, including ultrahigh large-scale vacuum system, ultrastable seismic isolation system, high-precision control system, high-quality laser and quantum source. Theoretically, the sensitivity of GWD with equal arm length is not limited by the laser source noise. However, in the actual scenario, the sensitivity is limited by the differences in arm length, arm cavity linewidth, arm reflectivity, arm mass, arm power, and the laser parameters. In this work, based on the design sensitivity (10–24 Hz–1/2) of dual-recycled Fabry-Perot Michelson interferometer, we propose the requirements for an ultra low-noise laser, including wavelength, amplitude noise, frequency noise, beam pointing noise and fundamental mode purity. The results show that in order to achieve the design sensitivity at the Fourier frequency of 100 Hz, the wavelength of the laser source should be 1.5 μm, the output power should be higher than 200 W, the amplitude noise should be better than 10–8 Hz–1/2, and the frequency noise should be better than 100 Hz/Hz1/2. To achieve the sensitivity of 10–24 Hz–1/2 at 10 Hz analysis frequency, the requirements for the amplitude and frequency noise of the laser source are much more stringent. This study lays a solid foundation for the analysis of laser source noise and the decomposition of interferometer indexes .
      通信作者: 郑耀辉, yhzheng@sxu.edu.cn
    • 基金项目: 国家重点研发计划(批准号: 2020YFC2200402)、国家自然科学基金(批准号: 62027821, 11874250, 62035015, 12174234)、山西省重点研发计划(批准号: 201903D111001)和山西省三晋学者特聘教授项目资助的课题.
      Corresponding author: Zheng Yao-Hui, yhzheng@sxu.edu.cn
    • Funds: Project supported by the National Key Research and Development Program of China (Grant No. 2020YFC2200402), the National Natural Science Foundation of China (Grant Nos. 62027821, 11874250, 62035015, 12174234), the Key Research and Development Projects of Shanxi Province (Grant No. 201903D111001), and the Program for Sanjin Scholar of Shanxi Province.
    [1]

    Abbott B P, Abbott R, Abbott T D, et al. 2016 Phys. Rev. Lett. 116 061102Google Scholar

    [2]

    Abbott B P, Abbott R, Abbott T D, et al. 2016 Phys. Rev. Lett. 116 241103Google Scholar

    [3]

    Vermeulen S M, Relton P, Grote H, et al. 2021 Nature 600 424Google Scholar

    [4]

    Bailes M, Berger B K, Brady P R, et al. 2021 Nat. Rev. Phys. 3 344Google Scholar

    [5]

    Abbott R, Abbott T D, Abraham S, et al. 2021 Astrophys. J. Lett. 915 L5Google Scholar

    [6]

    Badaracco F, Rossi C D, Fiori I, Harms J, Miyo K, Paoletti F, Tanaka T, Washimi T, Yokozawa T 2021 Phys. Rev. D 104 042006Google Scholar

    [7]

    Hall E D, Kuns K, Smith J R, et al. 2021 Phys. Rev. D 103 122004Google Scholar

    [8]

    Buikema A, Cahillane C, Mansell G L, et al. 2020 Phys. Rev. D 102 062003Google Scholar

    [9]

    Adhikari R X 2014 Rev. Mod. Phys. 86 121Google Scholar

    [10]

    Bond C, Brown D, Freise A, Strain K A 2016 Living Rev. Relativ. 19 3Google Scholar

    [11]

    Matichard F, Lantz B, Mittleman R, et al. 2015 Classical Quant. Grav. 32 185003Google Scholar

    [12]

    P. Nguyen, Schofield R M S, Effler A, et al. 2021 Classical Quant. Grav. 38 145001Google Scholar

    [13]

    Adhikari R X, Arai K, Brooks A F, et al. 2020 Classical Quant. Grav. 37 165003Google Scholar

    [14]

    Hammond G, Hild S, Pitkin M 2014 J. Mod. Optic. 61 S10Google Scholar

    [15]

    Heurs M 2018 Philos. T. R. Soc. A 376 20170289Google Scholar

    [16]

    Danilishin S L, Khalili F Y, Miao H 2019 Living Rev. Relativ. 22 2Google Scholar

    [17]

    Sigg D 1997 LIGO Report No. LIGO- T970084-00 D

    [18]

    Rana A 2004 Ph. D. Dissertation (Cambridge: Massachusetts Institute of Technology)

    [19]

    Somiya K, Chen Y 2006 Phys. Rev. D 73 122005Google Scholar

    [20]

    Izumi K, Sigg D, Kawabe K 2016 LIGO Report No. LIGO-T1500325

    [21]

    Izumi K, Sigg D, Kawabe K 2016 LIGO Report No. LIGO-T1500461

    [22]

    Izumi K, Sigg D, Kawabe K 2016 LIGO Report No. LIGO-T1500559

    [23]

    Cahillane C 2021 Ph. D. Dissertation (Pasadena: California Institute of Technology)

    [24]

    Cahillane C, Mansell G L, Sigg D 2021 Opt. Express 29 42144Google Scholar

    [25]

    Buonanno A, Chen Y 2001 Phys. Rev. D 64 042006Google Scholar

    [26]

    Pitkin M, Reid S, Rowan S, Hough J 2011 Living Rev. Relativ. 14 5Google Scholar

    [27]

    Kwee P 2010 Ph. D. Dissertation (Hanover: Wilhelm Leibniz University)

    [28]

    Chen Z, Guo M, Zhang R, Zhou B, Wei Q 2018 Sensors 18 02603Google Scholar

    [29]

    Degallaix J, Komma J, Forest D, Hofmann G 2014 Classical Quant. Grav. 31 185010Google Scholar

    [30]

    Khalaidovski A, Steinlechner J, Schnabel R 2013 Classical Quant. Grav. 30 165001Google Scholar

    [31]

    Biscans S, Gras S, Blair C D, Driggers J, Evans M, Fritschel P, Hardwick T, Mansell G 2019 Phys. Rev. D 100 122003Google Scholar

  • 图 1  引力波探测器光路图

    Fig. 1.  Diagram of the optical layout of Gravitational wave detection.

    图 2  探测灵敏度与激光功率的关系图

    Fig. 2.  Detection sensitivity as a function of laser power.

    图 3  激光源振幅噪声耦合传递函数图  (a) DARM偏移、辐射压力差异和对比度缺陷引起的振幅噪声耦合; (b) 辐射压力差异引起的振幅噪声耦合

    Fig. 3.  Coupling transfer function of laser amplitude noise: (a) Amplitude noise coupling due to DARM offset, radiation pressure difference and contrast defect; (b) amplitude noise coupling due to radiation pressure difference.

    图 4  探测灵敏度与激光源振幅噪声关系图

    Fig. 4.  Detection sensitivity as a function of laser amplitude noise.

    图 5  激光频率噪声耦合传递函数图

    Fig. 5.  Coupling transfer function of laser frequency noise.

    图 6  探测灵敏度与激光源频率噪声关系图

    Fig. 6.  Detection sensitivity as a function of laser frequency noise.

    表 1  山西大学引力波探测干涉仪参数表

    Table 1.  Parameter of Shanxi University gravitation waves detection interferometer.

    参数符号表示数值
    臂长$ L $10 km
    激光波长$ \lambda $1550 nm
    激光频率$ {\nu _0} $1.94 × 1014 Hz
    ITM, ETM质量$ M $200 kg
    约化质量$ \mu = \dfrac{{{m_{\text{i}}}{m_{\text{e}}}}}{{{m_{\text{i}}} + {m_{\text{e}}}}} = \dfrac{M}{2} $100 kg
    $ \delta \mu = \dfrac{{{\mu _x} - {\mu _y}}}{2} $–0.001 kg
    ITM透射率$ t_{\text{i}}^{\text{2}} $1.4%
    ETM透射率$ t_{\text{e}}^2 $5 × 10–6
    PRM透射率$ t_{\text{p}}^2 $3%
    SRM透射率$ t_{\text{s}}^{\text{2}} $20%
    激光功率$ {P_{{\text{in}}}} $200 W
    功率循环腔增益$ g_{\text{p}}^2 = {\left( {\dfrac{{{t_{\text{p}}}}}{{1 - {r_{\text{p}}}{r_{\text{a}}}}}} \right)^2} $120
    信号循环腔增益$ g_{\text{s}}^{\text{2}} = {\left( {\dfrac{{{t_{\text{s}}}}}{{1 + {r_{\text{s}}}{r_{\text{a}}}}}} \right)^2} $0.06
    臂腔增益$ g_{{\text{arm}}}^{\text{2}} = {\left( {\dfrac{{{t_{\text{i}}}}}{{1 - {r_{\text{e}}}{r_{\text{i}}}}}} \right)^2} $284
    臂腔反射率$ {r_{\text{a}}} = \dfrac{{ - {r_{\text{i}}} + {r_{\text{e}}}}}{{1 - {r_{\text{i}}}{r_{\text{e}}}}} $0.99929
    $ \delta {r_{\text{a}}} = \dfrac{{{r_{{\text{a}}x}} - {r_{{\text{a}}y}}}}{2} $31 × 10–6
    反射率导数$r_{\text{a} }' = \dfrac{ {t_{\text{i} }^{\text{2} }{r_{\text{e} } } }}{ { { {\left( {1 - {r_{\text{i} } }{r_{\text{e} } } } \right)}^2} } }$283.5
    臂腔线宽$ {f_c} = \dfrac{c}{{4{\text{π }}L}}\lg \left( {\dfrac{1}{{r_{\text{i}}^{\text{2}}r_{\text{e}}^{\text{2}}}}} \right) $14.6 Hz
    $ \delta {f_c} = \dfrac{{{f_{cx}} - {f_{cy}}}}{2} $0.05 Hz
    臂腔精细度$ F = \dfrac{{{\text{π }}\sqrt {{r_{\text{i}}}{r_{\text{e}}}} }}{{1 - {r_{\text{i}}}{r_{\text{e}}}}} $445.5
    总损耗$ T $2.24 %
    臂腔功率$ {P_{\text{a}}} = \dfrac{1}{2}{P_{{\text{laser}}}}g_{\text{p}}^{\text{2}}g_{{\text{arm}}}^2 $3.4 MW
    $ \delta {P_{\text{a}}} = \dfrac{{{P_{ax}} - {P_{ay}}}}{2} $–6.5 kW
    CARM腔
    线宽
    ${f_{cc} } = \dfrac{c}{ {4{\text{π } }L} }\lg \left( {\dfrac{ {1 + {r_{\text{i} } }{r_{\text{p} } } }}{ { {r_{\text{i} } }{r_{\text{e} } } + {r_{\text{p} } }{r_{\text{e} } }\left( {t_{\text{i} }^{\text{2} } + r_{\text{i} }^{\text{2} } } \right)} } } \right)$0.06 Hz
    DARM腔
    线宽
    $ {f_{{\text{rse}}}} = \dfrac{c}{{4{\text{π }}L}}\lg \left( {\dfrac{{1 - {r_{\text{i}}}{r_{\text{s}}}}}{{{r_{\text{i}}}{r_{\text{e}}} - {r_{\text{s}}}{r_{\text{e}}}\left( {t_{\text{i}}^{\text{2}} + r_{\text{i}}^{\text{2}}} \right)}}} \right) $131 Hz
    Schnupp
    不对称
    $ {l_{{\text{sch}}}} = {l_x} - {l_y} $0.08 m
    DARM偏移$ \Delta {L_{{\text{DC}}}} $10–13 m
    高阶模耦合$ {q_{{\text{HOM}}}} $1 × 10–7 W/RAN
    $ {k_{{\text{HOM}}}} $8 × 10–17 m/Hz
    下载: 导出CSV

    表 2  熔融石英和硅材料的物理性质对比

    Table 2.  Comparison of physical properties of fused silica and silicon materials.

    比较参数硅(~123 K)熔融石英(~300 K)
    密度/(g·cm3)3.432.21
    折射率(@1.5 μm)~3.48411.445
    热膨胀系数/K–10.001 × 10–65.5 × 10–7
    热导率/
    (W·(m K)–1)
    598.31.38
    吸收系数/cm–11.11×10 @1064 nm4×10–6@1064 nm
    3.2×10–8 @1550 nm2×10–5@1550 nm
    机械损耗角/rad0.00139 × 10–61 × 10–4
    杨氏模量/GPa131.173
    泊松比0.2790.17
    下载: 导出CSV
  • [1]

    Abbott B P, Abbott R, Abbott T D, et al. 2016 Phys. Rev. Lett. 116 061102Google Scholar

    [2]

    Abbott B P, Abbott R, Abbott T D, et al. 2016 Phys. Rev. Lett. 116 241103Google Scholar

    [3]

    Vermeulen S M, Relton P, Grote H, et al. 2021 Nature 600 424Google Scholar

    [4]

    Bailes M, Berger B K, Brady P R, et al. 2021 Nat. Rev. Phys. 3 344Google Scholar

    [5]

    Abbott R, Abbott T D, Abraham S, et al. 2021 Astrophys. J. Lett. 915 L5Google Scholar

    [6]

    Badaracco F, Rossi C D, Fiori I, Harms J, Miyo K, Paoletti F, Tanaka T, Washimi T, Yokozawa T 2021 Phys. Rev. D 104 042006Google Scholar

    [7]

    Hall E D, Kuns K, Smith J R, et al. 2021 Phys. Rev. D 103 122004Google Scholar

    [8]

    Buikema A, Cahillane C, Mansell G L, et al. 2020 Phys. Rev. D 102 062003Google Scholar

    [9]

    Adhikari R X 2014 Rev. Mod. Phys. 86 121Google Scholar

    [10]

    Bond C, Brown D, Freise A, Strain K A 2016 Living Rev. Relativ. 19 3Google Scholar

    [11]

    Matichard F, Lantz B, Mittleman R, et al. 2015 Classical Quant. Grav. 32 185003Google Scholar

    [12]

    P. Nguyen, Schofield R M S, Effler A, et al. 2021 Classical Quant. Grav. 38 145001Google Scholar

    [13]

    Adhikari R X, Arai K, Brooks A F, et al. 2020 Classical Quant. Grav. 37 165003Google Scholar

    [14]

    Hammond G, Hild S, Pitkin M 2014 J. Mod. Optic. 61 S10Google Scholar

    [15]

    Heurs M 2018 Philos. T. R. Soc. A 376 20170289Google Scholar

    [16]

    Danilishin S L, Khalili F Y, Miao H 2019 Living Rev. Relativ. 22 2Google Scholar

    [17]

    Sigg D 1997 LIGO Report No. LIGO- T970084-00 D

    [18]

    Rana A 2004 Ph. D. Dissertation (Cambridge: Massachusetts Institute of Technology)

    [19]

    Somiya K, Chen Y 2006 Phys. Rev. D 73 122005Google Scholar

    [20]

    Izumi K, Sigg D, Kawabe K 2016 LIGO Report No. LIGO-T1500325

    [21]

    Izumi K, Sigg D, Kawabe K 2016 LIGO Report No. LIGO-T1500461

    [22]

    Izumi K, Sigg D, Kawabe K 2016 LIGO Report No. LIGO-T1500559

    [23]

    Cahillane C 2021 Ph. D. Dissertation (Pasadena: California Institute of Technology)

    [24]

    Cahillane C, Mansell G L, Sigg D 2021 Opt. Express 29 42144Google Scholar

    [25]

    Buonanno A, Chen Y 2001 Phys. Rev. D 64 042006Google Scholar

    [26]

    Pitkin M, Reid S, Rowan S, Hough J 2011 Living Rev. Relativ. 14 5Google Scholar

    [27]

    Kwee P 2010 Ph. D. Dissertation (Hanover: Wilhelm Leibniz University)

    [28]

    Chen Z, Guo M, Zhang R, Zhou B, Wei Q 2018 Sensors 18 02603Google Scholar

    [29]

    Degallaix J, Komma J, Forest D, Hofmann G 2014 Classical Quant. Grav. 31 185010Google Scholar

    [30]

    Khalaidovski A, Steinlechner J, Schnabel R 2013 Classical Quant. Grav. 30 165001Google Scholar

    [31]

    Biscans S, Gras S, Blair C D, Driggers J, Evans M, Fritschel P, Hardwick T, Mansell G 2019 Phys. Rev. D 100 122003Google Scholar

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出版历程
  • 收稿日期:  2022-03-26
  • 修回日期:  2022-04-15
  • 上网日期:  2022-08-09
  • 刊出日期:  2022-08-20

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