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

5.868m

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 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

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+16.8465i

same

same

MCe

2.3889mm

26.6512+16.8465i

same

same

MCo

4.4703mm

0.25+16.8465i

same

same

IMMT1

2.5413mm

6.118+16.8465i

2.5413mm

6.118+16.8465i / 3.9404+0.8524i

IMMT2

2.7232mm

9.223+16.8465i

4.4734mm

7.0454+0.8524i / -12.9093+56.1168i

PRM

none

-

4.4828mm

8.31934+58.1447i

PR2

3.9637mm

15.0231+5.5228i / -1.40973+0.0428807i

4.4648mm

6.44215+58.1447i / -1.53283+0.0399461i

PR3

35.062mm

12.4758+0.0428807i / 1234.22+3145.49i

36.6854mm

12.5989+0.0399461i / 1039.26+293.48i

BS

35.002mm

-1218.45+3145.49i / 1215.12+3145.49i

36.1703mm

-1023.5+293.48i / 1020.17+293.48i

Arm waist

33.723mm

-

16.1970mm

-

ITMX/Y

34.806mm

857.932+3357.83i

35.3005mm

1500+774.597i

ETMX/Y

39.671mm

2080.42+3357.83i

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

* I/ETM RoCs are 14km and 7.5km for iKAGRA

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

(6000 +/- 100)ppm

HR Loss@1064nm

<100ppm

AR Reflectivity@1064nm

?(+/-??)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

(6000 +/- 100)ppm

HR Loss@1064nm

<100ppm

AR Reflectivity@1064nm

??(+/-??)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

??+/-??deg

Transmission@1064nm

<200ppm

HR Loss@1064nm

<100ppm

AR Reflectivity@1064nm

??(+/-??)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

-8.953(+/-0.1)m

AR Radius of Curvature

Flat (>100km)

As flat as possible

AR Wedge Angle

0.3(+/-??)deg

Transmission@1064nm

1500ppm<T<2000ppm

HR Loss@1064nm

<1000ppm

AR Reflectivity@1064nm

<0.1%

AR Reflectivity@670nm

>40%

Diameter

100mm?

Thickness

30mm?

MMT2 (bKAGRA)

HR Radius of Curvature

13.910(+/-0.1)m

AR Radius of Curvature

Flat (>100km)

As flat as possible

AR Wedge Angle

0.3(+/-??)deg

Transmission@1064nm

200ppm<T<400ppm

HR Loss@1064nm

<1000ppm

AR Reflectivity@1064nm

<0.1%

AR Reflectivity@670nm

>40%

Diameter

100mm?

Thickness

30mm?

MMT1 (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

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

???mm

TGG Thickness

??mm

TGG Wedge Angle

??deg

QR Diameter

???mm

QR Thickness

??mm

QR Wedge Angle

??deg

CWP Diameter

???mm

CWP Thickness

??mm

CWP Wedge Angle

??deg

HWP Diameter

???mm

HWP Thickness

??mm

HWP Wedge Angle

??deg