= IOO Optical Parameters =
Under construction...

----
== Mirror Location ==
=== Length ===
|| ||iKAGRA ||bKAGRA ||
||MCi to MCo ||0.500m ||same ||
||MCi/o to MCe ||26.400m ||same ||
||MCo to IMMT1 ||5.836m ||same ||
||IMMT1 to IMMT2 ||3.105m ||same ||
||IMMT2 to PRM ||5.017m ||same ||
||PRM to PR2 ||14.7615m ||same ||
||PR2 to PR3 ||11.0661m ||same ||
||PR3 to BS ||15.7638m ||same ||
||BS to ITMX ||53.3829m ||26.6650m ||
||BS to ITMY ||50.0531m ||23.3350m ||
||ITMX/Y to ETMX/Y ||2938.35m ||3000m ||
||BS to SR3 ||none ||15.7386m ||
||SR3 to SR2 ||none ||11.1115m ||
||SR2 to SRM ||none ||14.7412m ||


* note that there's no PRM and ITMs in iKAGRA

* ITMX/Y for iKAGRA is 26.718m ahead of ITMX/Y for bKAGRA (considering MC length and ITM substrate; iKAGRA ITM is silica/8cm thick, bKAGRA ITM is sapphire/15cm thick)

* ETMX/Y for iKAGRA is 34.932m ahead of ETMX/Y for bKAGRA

=== Incident Angles ===
||MCi ||44.729deg || ||PR2 ||0.6860deg || ||SR2 ||0.6860deg ||
||MCe ||0.543deg || ||PR3 ||0.6860deg || ||SR3 ||0.6860deg ||
||MCo ||44.729deg || ||IMMT1 ||3.6deg|| ||IMMT2|| 3.6deg||


=== Beam Radii ===
|| ||iKAGRA ||iKAGRA q-parameter (at HR surface) ||bKAGRA ||bKAGRA q-parameter (at HR surface) ||
||MC waist ||2.3887mm ||- ||same ||- ||
||MCi ||2.3889mm ||0.25+16.8470i ||same ||same ||
||MCo ||2.3889mm ||0.25+16.8470i ||same ||same ||
||MCe ||4.4703mm ||26.6512+16.8470i ||same ||same ||
||IMMT1 ||2.5398mm ||6.0858+16.8470i / -8.5782 + 5.3878i ||2.5413mm ||6.118+16.8465i / 3.9404+0.8524i ||
||IMMT2 ||1.9356mm ||-5.4733 + 5.3878i ||4.4734mm ||7.0454+0.8524i / -12.9093+56.1168i ||
||PRM ||none ||- ||4.4828mm ||8.31934+58.1447i ||
||PR2 ||3.8326mm ||14.3052+5.3878i / 1.4043+0.0455i ||4.4648mm ||6.44215+58.1447i / -1.53283+0.0399461i ||
||PR3 ||34.015mm ||12.4704+0.0455i / -862.87+3182.3i ||36.6854mm ||12.5989+0.0399461i / 1039.26+293.48i ||
||BS ||33.973mm/35.400mm ||-847.11+3182.3i / 964.65+3428.6i ||36.1703mm ||-1023.5+293.48i / 1020.17+293.48i ||
||Arm waist ||mm ||- ||16.1970mm ||- ||
||ITMX/Y ||none ||- ||35.3005mm ||1500+774.597i ||
||ETMX/Y ||39.589mm(Y) ||2141.3+3182.3i / -2023.8+3428.6i ||35.3005mm ||1500+774.597i ||
||SR3 ||none ||- ||36.6846mm ||1039.24+293.48i / 12.5989+0.0399479i ||
||SR2 ||none ||- ||4.3324mm ||-1.48739+0.0399479i / 7.10525+54.4941i ||
||SRM ||none ||- ||4.3380mm ||7.63598+54.4941i ||


* ETM RoCs are 7.32km for iKAGRA

* IMMT1 has RoC = 19.5 +/- 1 m, and IMMT2 is flat for iKAGRA

* Beam radii at PDs are less than ~0.4 mm

----
== Mirror Specs ==
'''MCi'''
||HR Radius of Curvature ||Flat (>100km) ||As flat as possible ||
||AR Radius of Curvature ||Flat (>100km) ||As flat as possible ||
||AR Wedge Angle ||2.5 (+/-??)deg || ||
||Transmission@1064nm ||(6019 +/- 48)ppm || ||
||HR Loss@1064nm ||<100ppm || ||
||AR Reflectivity@1064nm ||410(+/-68)ppm || ||
||Diameter ||95.97 mm ||(measured by Sigma Koki) ||
||Thickness at max ||29.45　mm ||(+/- 0.05 mm; measured by LMA) ||




'''MCo'''
||HR Radius of Curvature ||Flat (>100km) ||As flat as possible ||
||AR Radius of Curvature ||Flat (>100km) ||As flat as possible ||
||AR Wedge Angle ||2.5 (+/-??)deg || ||
||Transmission@1064nm ||(6098 +/- 48)ppm || ||
||HR Loss@1064nm ||<100ppm || ||
||AR Reflectivity@1064nm ||302(+/-30)ppm || ||
||Diameter ||95.95 mm ||(measured by Sigma Koki) ||
||Thickness at max ||29.50　mm ||(+/- 0.05 mm; measured by LMA) ||




'''MCe'''
||HR Radius of Curvature ||37.3(+/-0.1)m ||0.5% error ||
||AR Radius of Curvature ||Flat (>100km) ||As flat as possible ||
||AR Wedge Angle ||2.5+/-??deg || ||
||Transmission@1064nm ||4.7ppm || ||
||HR Loss@1064nm ||<100ppm || ||
||AR Reflectivity@1064nm ||17(+/-3)ppm || ||
||Diameter ||95.95 mm ||(measured by Sigma Koki) ||
||Thickness at max ||29.45　mm ||(+/- 0.05 mm; measured by LMA) ||




'''MMT1 (bKAGRA)'''
||HR Radius of Curvature ||-8.910 +/- 0.009 m ||measured; [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5981|JGW-T1605981]] (spec was -8.953(+/-0.1)m)||
||AR Radius of Curvature ||Flat (>100km) ||As flat as possible ||
||AR Wedge Angle ||2.45 deg ||measured ||
||Transmission@1064nm ||2700ppm<T<3200ppm || ||
||HR Loss@1064nm ||<1000ppm || ||
||HR Transmissivity@1064nm|| 0.3%(AOI = 2.59deg)|| measured by vendor||
||AR Reflectivity@1064nm ||0.03% || measured by vendor ||
||AR Reflectivity@670nm ||~48%（AOI=0deg), ~50.5%(AOI=30deg), ~49.5%(AOI=45deg)|| ||
||Diameter ||99.77mm ||measured ||
||Thickness ||51.76mm ||measured at thinnest point ||




'''MMT2 (bKAGRA)'''
||HR Radius of Curvature ||14.005 +/- 0.238 m ||measured; [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5981|JGW-T1605981]] (spec was 13.910(+/-0.1)m)||
||AR Radius of Curvature ||Flat (>100km) ||As flat as possible ||
||AR Wedge Angle ||2.45 deg ||measured ||
||Transmission@1064nm ||200ppm<T<400ppm || ||
||HR Loss@1064nm ||<1000ppm || ||
||HR Transmissivity@1064nm|| 0.028%(AOI = 2.59deg)|| measured by vendor||
||AR Reflectivity@1064nm ||0.03% || measured by vendor ||
||AR Reflectivity@670nm ||~48%（AOI=0deg), ~50.5%(AOI=30deg), ~49.5%(AOI=45deg)|| ||
||Diameter ||99.75mm ||measured ||
||Thickness ||52.93mm ||measured at thinnest point ||




'''MMT1 (iKAGRA)'''
||HR Radius of Curvature ||19.5(+/-1)m || ||
||AR Radius of Curvature ||Flat || ||
||AR Wedge Angle ||??+/-??deg || ||
||HR Reflectivity@1064nm ||> 99.5% || ||
||Transmission@1064nm ||0.78% (measured) || ||
||HR Loss@1064nm ||?? || ||
||AR Reflectivity@1064nm ||< 1% || ||
||Diameter ||???mm || ||
||Thickness ||??mm || ||




'''MMT2 (iKAGRA)'''
||HR Radius of Curvature ||Flat || ||
||AR Radius of Curvature ||Flat || ||
||AR Wedge Angle ||??+/-??deg || ||
||Transmission@1064nm ||?? +/-?? || ||
||HR Loss@1064nm ||<100ppm || ||
||AR Reflectivity@1064nm ||?(+/-??)ppm || ||
||Diameter ||???mm || ||
||Thickness ||??mm || ||




'''IFI'''
||TGG Diameter ||20mm || ||
||TGG Thickness ||12mm || ||
||TGG Wedge Angle ||0deg || ||
||TGGin pol. rotation (meas.) ||22.53deg || ||
||TGGout pol. rotation (meas.) ||22.54deg || ||
||QR Diameter ||20mm || ||
||QR pol. rotation ||67.5deg || ||
||QR Wedge Angle ||0deg || ||
||CWP width ||25.4mm || ||
||CWP Thickness ||??mm || ||
||CWP Wedge Angle ||8.8deg || ||
||DKDP Diameter ||25.4mm || ||
||DKDP Thickness (KAGRA) ||3mm || ||
||DKDP Wedge Angle ||0deg || ||

'''EOM'''
|| Size || 4mm x 4mm x 40 mm||
||Wedge (in) ||2.8/2.8deg ||
|| Wedge (out) ||2.8/2.0deg||

See, T1605400