MIF's Interface with IOO

Carrier

iKAGRA

Wavelength

1064nm

Comment

Power

>500mW at PRM AR

Polarization

S

Complex beam radius at the PRM AR

9.8358048093144834+i*18.307397678406861

So called q-parameter in the unit of m. Although there is no PRM in iKAGRA, this is a beam parameter at the position where the AR surface of the PRM will be located in bKAGRA. This parameter gives the perfect mode match to the iKAGRA arm cavities. However, the MIF does not require IOO to provide 100% mode matching in iKAGRA phase.

Frequency Noise Requirement

To be calculated from the viewpoint of lock acquisition.

Residual frequency noise after the MC.

Beam Jitter

To be calculated from the viewpoint of lock acquisition.

bKAGRA

Wavelength

1064nm

Comment

Power

75W at PRM AR

Polarization

S

Complex beam radius at the PRM AR

-10.580258464886768+i*56.648923633432595

So called q-parameter in the unit of m.

Frequency Noise Requirement

BRSE, DRSE

Residual frequency noise after the MC. For more detailed discussion, see this.

Beam Jitter

3e-11 rad/rtHz@10Hz, 7e-14 rad/rtHz@100Hz (Safety mergin of 20)

Detail

Modulations

iKAGRA

Name

Freqency

Type

Mod. index

Relative Amplitude to Carrier before PRM

Comment

f1

16.880961MHz

PM

0.1rad

bKAGRA

Name

Frequency

Type

Mod. index

Relative Amplitude to Carrier before PRM

Comment

f1

16.880961MHz

PM

0.15rad

f2

45.0159MHz

PM

0.05rad

f3

56.2699MHz

AM

0.05rad

Non-resonant sidebands to be used only for lock acquisition.

Assumed modulator arrangement