Optical Power 180 W Laser k W PreMC

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各ミラーでのパワー Optical Power 180 W Laser (k. W) Pre-MC MC in/out MC end 10

各ミラーでのパワー Optical Power 180 W Laser (k. W) Pre-MC MC in/out MC end 10 = 200 W x 50 24 = 150 W x 158 PRM, PR 2 0. 8 PR 3 0. 8 ITM 400 ETM 400 2012/3/22 3 km の共振器に 400 k. W の光が蓄積され 重力波(時空歪み)を 検知する。 日本天文学会 2012年春季 @龍谷大学、京都

各ミラーでのパワー密度 Intra-Cavity Power Beam Radius (k. W) (cm) Power Density (k. W/cm 2) 10

各ミラーでのパワー密度 Intra-Cavity Power Beam Radius (k. W) (cm) Power Density (k. W/cm 2) 10 0. 046 1500 24 0. 25 118 24 0. 44 39 PRM, PR 2 0. 8 0. 40 1. 6 PR 3 0. 8 3. 65 0. 02 ITM 400 3. 51 10 ETM 400 4. 00 8   Pre-MC MC in/out MC end 2012/3/22 = 200 W x 50 = 150 W x 158 日本天文学会 2012年春季 パワー密度 の点では 「カテゴリー1」 が一番シビア。 @龍谷大学、京都

熱変形・熱レンズ 熱吸収 0. 2 ppm Power Density Thermal Distortion (k. W/cm 2) Pre-MC MC

熱変形・熱レンズ 熱吸収 0. 2 ppm Power Density Thermal Distortion (k. W/cm 2) Pre-MC MC in/out MC end PRM, PR 2 PR 3 2012/3/22 Thermal Lens Designed Ro. C (meter) 1500 1667 67 0. 3 118 21200 847 flat 39 64100 2560 40 1. 6 1562500 304 -2. 76 0. 02 125000000 24. 574 日本天文学会 2012年春季 @龍谷大学、京都

滑らかに研磨された基板 どれくらい滑らか? Relationship between Total Integrating Scatter (TIS) and micro-roughness (d) 総散乱量 l =

滑らかに研磨された基板 どれくらい滑らか? Relationship between Total Integrating Scatter (TIS) and micro-roughness (d) 総散乱量 l = 1064 nm s 相関距離 総散乱量 = 1 ppm d = 0. 85 Angstrom

Non-coating Super-polished substrate Micro-roughness <0. 75 Angstrom RMS

Non-coating Super-polished substrate Micro-roughness <0. 75 Angstrom RMS

25 mm

25 mm

市販ミラーの散乱量 Maker   Product#     Refrectivity >99. 97% Angle Scattering (ppm) Ro. C

市販ミラーの散乱量 Maker   Product#     Refrectivity >99. 97% Angle Scattering (ppm) Ro. C 0 flat 27 2012/2/9 99. 998% 0 flat 27 2012/2/13 ? ? ? 99. 999% 0 1 m, concave 26 2012/2/12 ? ? ? FS 52% 45 flat 44 2012/2/15 Y 1 S-1025 -0   FS >99. 99% 0 flat     6     7     8     9     10 CVI Melles Griot PR 1 -1064 -99 -IF-2037 -C EB BK 7 99% 0 flat w/ wedge 126  2012/2/10 11 CVI Melles Griot Y 1 -2037 -45 S EB BK 7 >99. 5% 45 flat 146  2012/2/18 13     14         15 ALTECHNA   ? ? ? BK 7 45 flat 133 2012/2/14 16     17     18     19     20 NEW FOCUS ? ? ? Pyrex 0 -45 flat 279 2012/2/10 1 Newport 10 CM 00 SR. 50 T IBS FS 2 Showa Optronics Co. LTD 2010 年購入 IBS ? ? ? 3 Advanced Thin Films CRD 1064 -1025 -100 IBS 4 Lattice Electro Optics BS-1064 -Rs 50 -45 -UF-2038 4 CVI Melles Griot 5 5104     99. 80% >99%

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Fundamentals Thermal lens which has a curvature radius of R is expected by the

Fundamentals Thermal lens which has a curvature radius of R is expected by the following equations. Heating laser power density P/pw 2

Deformation and lensing coefficient The effect of thermal lensing is larger than that of

Deformation and lensing coefficient The effect of thermal lensing is larger than that of thermal distortion Fused Silica lensing Sapphire 2012/3/22 日本天文学会 2012年春季 @龍谷大学、京都

Pre Mode Cleaner Shape Bow tie Beam Pass Air (in air tight case) Round

Pre Mode Cleaner Shape Bow tie Beam Pass Air (in air tight case) Round trip length 1. 95 m Reflectivity of in/out coupler 98% Radius of Curvature of in/out 0. 3 m Free Spectrum Range 154 MHz Finesse (intra power gain) 155 (50) Cutoff frequency of the cavity 25 k. Hz Beam radius at the waist 0. 199 mm Beam radius on the mirrors 0. 460 mm Material of spacer Supper invar or aluminum Actuator PZT stage (DC-0. 1 Hz) or Heater Modulation frequency To be decided 2012/3/22 日本天文学会 2012年春季 @龍谷大学、京都

Mode Cleaner Shape Narrow triangle Beam Pass in vacuum Distance between in/out mirrors 0.

Mode Cleaner Shape Narrow triangle Beam Pass in vacuum Distance between in/out mirrors 0. 5 m Round trip length 53. 296 m Reflectivity of in/out mirror 99. 37 % Reflectivity of end mirror 99. 99 % Radius of Curvature of in/out flat Radius of Curvature of end mirror 40 m Mirror dimension Diameter 100 mm, thickness 30 mm Wedge angle of AR side 2. 5 degree 2012/3/22 日本天文学会 2012年春季 @龍谷大学、京都

Mode Cleaner Free Spectrum Range 5. 625 MHz Finesse (intra power gain) 500 (158)

Mode Cleaner Free Spectrum Range 5. 625 MHz Finesse (intra power gain) 500 (158) Cutoff frequency of the cavity 5. 625 k. Hz Beam radius at the waist / in / out 2. 53 mm Beam radius on end mirrors 4. 38 mm Vibration isolator Type C Actuator Coil magnet Modulateion frequency To be decided 2012/3/22 日本天文学会 2012年春季 @龍谷大学、京都

Arm Cavity Pre Mode Cleaner Shape Linear Beam Pass in vacuum Round trip length

Arm Cavity Pre Mode Cleaner Shape Linear Beam Pass in vacuum Round trip length 6000 m Reflectivity of input mirror 99. 6% Radius of Curvature of input 1. 68 km (0. 008) Reflectivity of end mirror 99. 995 % Radius of Curvature of end 1. 87 km (0. 009) Free Spectrum Range 1. 55 k. Hz Finesse (intra power gain) 1550 (1000) Beam radius on input mirror 35. 064 mm Beam radius on end mirror 39. 983 mm Vibration isolator Type A Actuator Coil magnet or Electrostatic 2012/3/22 日本天文学会 2012年春季 @龍谷大学、京都

<2 Angstrom

<2 Angstrom